**Note from Author: I’d advise to read previous part(s) first to fully understand what’s going on in the story. The story you’re about to read contains scenes of minors under light bondage and being tickled, so if this concept makes you uncomfortable, or is illegal where you live, then read no further. The story absolutely DOES NOT contain any sex related content or nudity whatsoever, so if you are looking for that you’ll have to look elsewhere, and if it includes kids, then you should go seek psychologist's help instead. Also, (because of recent conversations with various people) what I write about absolutely DOES NOT reflect anything I do in real life, and is very much separate from it, and what I mean by that I do not practice tickling or bondage of minors/adults or anyone/anything as some people thought I did after first 2 stories. This story is based around UNDERTALE owned by Toby Fox and is entirely fictional, so any similarity between characters of this story and actual people are coincidental. It’s also recommended to play or watch a playthrough of that game to fully understand the stories. If you have any questions about this and the upcoming stories don’t fear to ask in the comments or notes and I’ll try to answer them. Thank you and Enjoy! UltimateReader4768 [September 2019-February 2020]**

Enjoy!

Playfultale – A Trail Through the Past

Chapter 2: Exploration full of laughter, part 2.

During the night, the newbound siblings slept peacefully, smiling in their deep sleep, apparently having good dreams. In the morning, Asriel woke up to the smell of butterscotch, and smiled when he realized he was cuddling with Chara again. Being gentle not to wake his sister up, he got out of their bed and noticed that he got tucked in with his clothes on. Chara also had been tucked in with her clothes on. He then left his room silently and headed towards the kitchen, where he heard Asgore and Toriel having a conversation with Sans and Gaster. Surprised by the skeletons’ early presence, he walked in and greeted them all.

Azzy: Good morning everyone!

Asgore: Good morning, my son! How was your night?

Toriel: You’re up early this morning.

Sans: Sup’ kid!

Gaster: Good morning, Young Prince!

Azzy: I slept well, and Chara is still asleep. By the way, what time is it? And what are you doing here, Gaster and Sans? *he said smiling at his family and friends*

Sans: Tori invited us over for a breakfast, and we decided to wait for you two to wake up so that we could continue showing Chara around The Underground. *he answered the young boy’s question*

Azzy: That’s great, thanks you two! *his stomach grumbled, to which he blushed and smiled shyly*

Toriel: Heeheehee! Sit down, I’ll serve you butterscotch-chocolate pancakes in a minute.

Azzy: Thanks Ma!

He took a seat at the table and started waiting for breakfast. He chatted with Sans and Gaster about what they’ll explore this time and how and where did they plan to let Chara “get him back”. The skeletons winked at themselves and said that they’ll stop by somewhere at the Ruins, to which Toriel and Asgore smiled.

Azzy: Cool, that means she’ll be able to meet with Papyrus, Undyne, Alphys and MK (monster kid)! Oh, Sans, do you think she'll like the guard dogs? Their massive appearance may scare her!

Sans: Nah. I think she'll love them. Besides, all you have to do to win them over is to play with them or pet them. *He said while he pat and stroked the little kid's head, to which he smiled*

Azzy: *lets out a puppy-like yawn and relaxes his head for Sans to stroke, making everyone smile at the cute scene*

Gaster: D-aaaawww, why do you have to be so cute, Fluffy? *He exclaimed, showing his weakness for cute things, which he keeps super-secret around anyone else, but The Dreemurrs and his close family, and trustworthy friends.* By the way, do you know what else she may find really great, well, except Papyrus of course? *He asked him, smiling and chuckling at the mention of his younger son.*

Azzy: I don't know? *He smiled back at him innocently*

Gaster & Sans: *in unison* This! *They started tickling the young prince of The Underground, with Gaster attacking his ribs and sides and Sans going to town on his overly-sensitive ears and neck*

Azzy: YAAAAAAAAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA!!! STAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAP, IHIHIHIHIHIHIHIHIHIHIHIHIHIT TIHIHIHIHIHIHIHIHIHIHIHIHICKLEHEHEHEHEHEHEHEHEHS!!!! NAAAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA!!!!

Chara: *enters the kitchen, rubbing her eyes* Just what on earth is going on here? * She asked, her voice a bit groggy and sleepy*

Sans: Oh, hey Chara! Did we wake you up? *He greeted her, still continuing his assault on poor Asriel*

Chara: No, you didn't. I woke up to this wonderful smell, and heard Azzy's laughter while in the hallway.

By that point Sans and Gaster eased up their tickle attack on Azzy and let the kids have breakfast. Chara was absolutely amazed by the taste of Toriel's butterscotch-chocolate pancakes. After they ate their pancakes Toriel gave them a plate of bacon and eggs each to finish up the breakfast. With full tummies the kids thanked Toriel for the breakfast and headed to their room to collect items they'll need to take with them. When they finished up packing, Chara suddenly launched herself at Asriel, pinning him down on the floor.

Azzy: *surprised by his sister's sudden attack* Um… Chara? What are you doing?

Chara: *smiling widely at her brother* Oh, nothing really. I'm just gonna show you a preview of what you'll get at the end of today! *She exclaimed excitedly and stuck her hands under his turquoise-red t-shirt and vibrated her fingers deep into his belly, being cautious not to cause accidental pain.*

Azzy: NAAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAT AHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAGAIN!!!! EEEEEEEEEEEHEEHEEHEEHEEHEEHEEHEEHEEHEEHEEHEEHEEHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA HOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHO!!!!!! *He laughed out, faking irritation and being annoyed by his sister* YOU WIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHHIHIHIHIHIHIHIHIHILL GEHEHEHEHEHEHEHEHEHEHEHEHEHET MEEHEEHEEHEEHEEHEEHEEHEE BAHAHAHAHAHAHAHAHAHACK LAHAHAHAHAHAHAHAHAHAHAHAHATER!!!! BAAAAAAAAAAAAAAAAH!!!!! EEEEEEEEEEEEEEEEEEEEEEEEEHEEHEEHEEHEEHEEHEEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA!!!!!

Chara: Oh, wow! All this precious laughter and bleats from just some light vibrations on your belly? You really are extremely ticklish! *She said as she eased up on his belly, and moved onto his ribs and sides.*

Azzy: NAAAAHAAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAA!!!!!! BAAAAAAAAAAAAAAAAAAAAAAAAAAAAH!!!!!! STAHAHAHAHAHAHAAHAHAHAHAHAHAHAHAAHAHAHAHAHAHAHAHAHAHAHAPPIHIHIHIHIHIHIHIHIHIHIHIHIT!!!!!! *He laughed preciously and wiggled cutely under Chara's hold.* PLEEEEEHEEHEEHEEHEEHEEHEEHEEHEEHEEHEEHEEHEEHEEZ!!!!!

Chara: *stops her assault, but still holds him down with her fingers resting on his belly to tease him* Ok, I will stop now, but I have to say that your precious laughter is pretty addictive and very cute! *Skitters her fingertips very lightly around his fluffy and soft belly, making the precious goat boy laugh lightly.*

Azzy: *blushes from the unusual compliment he just received and laughs lightly at the light tickling sensation* HEHEHEHEHEHEHEHEHEHEY!! YOU SAHAHAHAHAHAHAID YOU WIHIHIHIHILL STOHOHOHOHOP!!! BAAAAAAAAAAAAAAAAH!!

Chara: *Stops her assault completely and helps her giggly brother get up.* Hehehe! Sorry, I just couldn't resist! You're like the cutest, precious thing in the world! *She said, hugging him tightly.*

Azzy: Aaaawwwww! Thank you! *He returned the hug, tearing up a bit, which Chara noticed…*

Chara: Hey, no need to cry over a simple compliment! Here, let me cheer you up! *She tightened her hold on him and started poking his ribs through his turquoise-red sweater, making him laugh again!*

Azzy: BAAAAAAAAAAAAAAAAAH! NAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA!!!! OKAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAY, I'M FIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHINEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHE!!! YOU CAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAN STOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOP!!!! *He laughed out, wiggling in Chara's hold again and falling down onto his knees, while she continued her assault, until…*

Sans and Gaster were listening to them from the corridor and they decided to help Asriel get out of this ticklish situation. They walked into the room unnoticed by Chara, and snuck up behind her.

Sans: *snaps his fingers, activating his telekinesis powers on Chara and lightly yanking her away from Azzy.* Well, well, well… looks like someone loves tickling their siblings!

Gaster: Hehe, well, I couldn't really blame you, Chara. Hearing such cute laughter can be addictive! *He said, poking her stomach a few times.*

Chara: *starts giggling* Hehehehey! Cuhuhuhuhuhut it ohohohohohout! I wahahahas juhuhuhuhuhust showing him whahahahahat to ehehehehexpect at thehe end of the day!

Sans: *releases her* Hehe, we know you were! We actually overheard your conversation a bit. You really created a tight and strong bond with Asriel in a very short time… which is impressive!

Chara: How could I not love him as my brother, when he, and Asgore and Toriel accepted me into their family with open arms? They have shown me love which I haven't been given for a very long time…

Gaster: *stops her delicately from going into a flashback by putting his index finger onto her lips lightly* Shhhhh… It's ok. We know. *everyone was awkwardly silent for two minutes, until he broke the silence* Ahem… Anyways, are you ready to head out? We've got a lot of things to show you today, Chara.

Azzy & Chara: Yeah! We are ready, let's head out! *They said in perfect unison, looked at each other and laughed* Wow, that was perfectly synchronised! *Again, they laughed at the silly event.*

Gaster looked at them and smiled, hiding his shock, as such perfect synchronisation wasn't possible without a strong, magical connection between SOULS, which he has seen only two examples of when Monsters were on The Surface. Sans couldn't hide his own shock as well as his father did, and his eye sockets widened when he caught up on what has happened. He looked at Gaster and then at the kids and signed in wingdings to his father if he was sure he was really seeing what he just saw. That just shows how rare these bonds are, and how special they can be. There is a saying between the Monsters, that when two souls, a human and a monster ones, form this kind of bond, they will be able to talk, think, feel and live as if they were one being. Some legends say that the connection is so strong, that given enough power in very special form, it will be able to bring the two fallen ones back to life. That bond is so strong, that not even death or pure hate can break it. The monsters that experience this special bond accumulate the magic of Human's side and SOUL trait, and vice versa, the humans accumulate the Monster's magic and traits, if existent. It is so very rare because it can only be formed between two very pure and innocent souls, and only between Humans and Monsters.

The moment was so brief, that the kids didn't notice their friends' shock, and they grabbed their backpacks and went over to the two skeletons waiting for them, snapping them out of their thoughts.

Chara: Umm… Sans? We are ready!

Sans: *a bit startled* Oh, sorry about the delay kiddos…

Azzy: *goes over to Gaster and takes his hand* Uncle Gaster? Hello! Are you there?

Gaster: *jolts lightly at feeling Asriel's fuzzy hand touching his own hand* Oh, umm… sorry about that, I was just lost in thought… So, to the lab we go! *He snaps his fingers and teleports all of them into his lab, where they finished their journey last time*

Chara: AAAAAAAAH! Woah! You need to warn me before you teleport us like that! *She literally spun around and flopped down into the floor onto her butt* My head spins so much now!

Azzy: *bursts into laughter* PFFFFFFFFFFFFFFFFFT!!! BWAHAHAHAHAHAAHAHAHAHAHAHAHA!!!! Oh my god, you should've seen yourself! *He imitates what she did just a minute ago and continues laughing, rolling around on the floor*

Gaster: Hehehe, sorry Chara. I forgot you aren't used to being teleported over long distances yet! *He went over to her and helped her get up from the ground*

Chara: Thanks, and no problem haha! Now, I think we have some fuzzball rolling around gere uncontrollably. Would it be ok if I stopped it so that we could continue?

Sans: *chuckling* Hehehe, I guess it would be, yes!

Asriel had lost himself in the funniness of his sister falling to the ground like she did just a moment ago, that he didn't pay attention to what was happening around him. Having noticed that, Chara went over to him and when he rolled over onto his belly, she quickly sat on his calves and started scribbling her fingers all around his adorable, little, furry three-toed feet, going in between the toes and paying close attention to the balls of his feet. When the little goat monster felt those unbearably intense tickles on his feet, he started bleating and laughing hysterically.

Chara: *in a sing-songy, teasing voice* Coochie coochie coo!! That's what you get for laughing at someone's incidents, Fluffy!

Azzy: NAAAAAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA!!!! BAAAAAAAAAAAAAAAAAAAAAH!!!! NOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOT FEET TEEHEEHEEHEEHEEHEEHEEHEEHEEHEEHEEHEEHEEHEEHEEHEECKLIHIHIHIHHIHIHIHIHHIHIHIHHIHIHIHIHIHIHIHING AGAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAIN!!!!!!

Chara: *stops her tickle assault and helps the giggling goat boy get up* Hehehehe, you have just asked for it, and you knew that, you cute fluffball! *She teased and hugged him, making him blush.*

Sans: <Why do those kids have to be so darn adorable?> Hehehe, someone really likes the affection, huh Azzy?

Asriel was blushing so much that you could see him get red in the face through his fluffy white fur! But he couldn’t really disagree with Sans. He did like the affection Chara was giving him ever since the previous day, but was a little bit confused as to how she really got so comfortable around him and other monsters so fast. Either way, he was really happy to have an ‘adopted’ sibling in his life, and even though he knew her for only three days, he did love her just as she loved him.

Chara: *lets go of him and takes his hand* Ok, we calmed down, we may proceed.

Gaster: Ok, It’s about time we head on too, as very soon this place will beco- *SLAM*

Just as he was about to finish his sentence, he had been hit by something/someone from behind and they were sent tumbling across the lab floor.

???: *Realizes what has happened and hastily gets up from Gaster and proceeds to help him get up* O-oh, D-d-doctor G-Gaster!! I’m S-sorry, I slipped a-a-and h-h-hit you!

Gaster: *gets up, and smiles at the person who knocked him out off his feet* Ehhh, it’s nothing, Dr. Alphys, I’ll be fine. I’m more concerned about your wellbeing. Just tell me, how in the entire Underground did you manage to slip on a carpeted floor? *he said while chuckling to himself*

Alphys: *blushes* Um… I-I, ummm… T-this was t-t-truly u-unintentional!

Gaster: *lifts her up with his telekinesis* Let me guess, you thought you were late to work again? You are here 15 minutes before your shift starts!

Alphys: W-what? I thought I h-have set my clock c-c-correctly t-this time! *Tries to wiggle out of his hold, but is unable to do so* <Also, could you please set me down already?>

Gaster: Or did you fall asleep while WATCHing anime and forgot to set it? *He said, pointing to his watch*

Chara and Azzy: *they giggle at Gaster's pun, and drive Alphys' attention towards them.*

Alphys: *notices Chara* W-woah! Wh-wh-who are y-you?

Chara: I’m Chara. I fell down here 2 days ago and Asgore and Toriel adopted me, because my foster parents were abusive towards me. *she said, putting her hand forward to greet the shy yellow lizard monster*

Alphys: *shakes Chara’s hand.* P-p-pleasure to meet y-you, C-chara. *she said shyly*

Azzy: We were planning to continue showing Chara around the Underground. Yesterday we finished here, and I’ve tickled Chara senseless because she was being checked up by Gaster because she was injured by her fall and after that he tickled her briefly, but she told us she liked being tickled because people who were nice towards her used to cheer her up by tickling her, and she wanted to try being tickled for a longer time and restrained, so I tickled her while Sans and Gaster restrained her with their magic, and today she is going to tickle me at the end of the journey as a kind of revenge. *he said in one breath and very fast, almost fainting*

Sans: Kid, don’t forget to breathe! *he said while chuckling*

Alphys: Oh, sounds like both of you had fun! You two can visit me tomorrow if you’d like, and we’d do some origami and watch some anime together. *she said, smiling* I won’t be stopping you now, you have a long way to the Ruins. I also have some work to do here today, so I’ll get going.

She then grabbed her things and walked down the hallway and into her office. Gaster then proceeded to guide Chara around the lab, showing her some of the machines and explaining how everything was powered by magic generated by The Core. When he finished, the four of them walked out of the Lab and proceeded to cross the bridge leading to the Waterfall. Chara stopped sometimes to take in the beautiful view of complex machinery The Core was, alongside some other minor things, and the castle outlined in the fog surrounding the Hotlands. When they approached The Waterfall, it was raining, so the kids changed into appropriate clothing and when they were ready, they took their umbrellas out of their backpacks and proceeded walking along with Gaster and Sans. While walking, Chara and Asriel were poking each other in the ribs or bellies playfully, giggling all the way. Suddenly Asriel perked up and started running. He ran for a while, gaining speed and leaped through the air. There was a surprised scream and a metallic ‘CLANK’ noise could be heard.

Azzy: *giggling loudly* Hahaha! I’ve got you this time, Undyne! *He said while getting off her back*

Undyne: *Gets off the ground* HUHUHUHUHUHU!! I surely wasn’t expecting you here this early, Fluffbuns Jr! And be aware that I’ll take my revenge!

Asriel then ran away from her and hid behind Chara, while Undyne chased after him. She stopped abruptly in shock just before Chara and looked at her in confusion.

Undyne: Wait, what’s a human doing here? *She asked, very confused.*

Azzy: That’s my new sister, Chara! Mom and Dad adopted her yesterday, because two days ago she fell down here while running from her abusive foster parents. *He quickly explained, knowing that Undyne has a short temper and is very protective about monsters.*

Chara: Azzy, I could’ve introduced myself! You’ve done that for me second time now, you know I’m not that shy anymore, because I know no monster will hurt me.

Undyne: Ah, yeah I’ve heard about that. I was actually wondering why were you running so desperately at that time, Asriel. *She smiled* I’m Undyne by the way, pleasure to meet you, Chara. *she shook her hand and ruffled her hair* What are the four of you doing here this early?

Gaster: We are showing Chara the way around The Underground. Yesterday we finished in my Lab where I checked Chara up for injuries, and Asriel tickled Chara senseless.

Chara: And today I’ll be getting him back for that! *she exclaimed, tickling Azzy’s sides for a while, making the boy laugh.*

Sans: We’ll be ending at The Ruins. *He said, winking to her as if telling her a secret*

Undyne: Huhuhu! I’ll sure be waiting for you there! *she whispered back to him, making sure the Kids didn’t hear a thing.*

What Sans was implying was that Asgore requested Gaster and Sans to make a playroom in The Ruins for Asriel and his friends, in the place Sans reported to him as being Azzy’s “Secret hideout”. They basically used some of the abandoned buildings to build a big place for them to play in, making sure it was immune to any kind of magical abilities, be it fire or explosion, or ice. There was a bedroom for them when they tire out and want to take a nap, and a specialised room designed to train their magic skills. They were planning a belated birthday party for the Prince, but due to Chara arriving abruptly they actually had to get another bed in there for her, as well as make sure the bathroom was functioning properly. Every Monster’s house had a bathroom in it in case of accidents similar to Chara’s.

Gaster: We’d better get going, kids, we have a lot of things to sow you, Chara. *He said, taking a look at his watch, stopping Chara’s ticklish assault on her brother.*

The quatro passed through the waterfall, showing Chara multiple rooms. She was astounded by the beautiful look of the crystal ceiling of one of the rooms, and the pretty crystals that grew on the pathway. She also found the Echo Flowers to be very amusing, and had fun with them for a while. They showed her where she could find the River Person, who could easily transport her between Snowdin, Waterfall and Hotlands. The trip through The Waterfall took them around 3 hours in total. It was a good thing that Snowdin area was pretty simple to guide through, as most of the puzzles were deactivated there.

When they were entering snowdin, Chara and Azzy changed into some winter clothes, and Chara asked Sans and Gaster some questions about Undyne and Alphys. She learned that they were a couple, despite being females, and that Alphys is Gaster’s right hand at the Lab, and takes care of things while he isn't there. She started admiring Undyne after she heard about her being the Captain of the Royal Guard. Gaster told her that she would rather die herself than have other monsters injured or dusted, and that she’s pretty determined and a fierce fighter, but a big softie inside.

The kids were ready yet again, and they were getting ready to pass through the foggy way into the Snowdin Town. While they were walking, they didn’t notice that someone was walking right behind Chara and Asriel, and when they made it into clear air, Sans looked confused, which was unusual. Suddenly…

Papyrus: *puts his head between Asriel’s and Chara’s heads, and starts laughing slowly in a voice much lower than his usual voice.* Nyeheheheheh!

The Kids: *they literally leaped up into the air, startled by the third skeleton’s sudden appearance.* AAAAAAAHHHHHHHHH!!!!!!

Paps: *in his normal voice* NYE HEH!! Hello there, Asriel and Asriel’s friend! Sorry for startling you, but I just couldn’t resist getting a prank in on you.

Azzy: *starts giggling* Well, that was great! You should’ve seen my face!

Paps: Well, I am the GREAT PAPYRUS afterall! *he exclaimed while cackling to himself*

Chara: Oh, so you are Sans’ brother, and Gaster’s other son? I’ve heard some great things about you! I’m Chara, by the way, and I’m Asriel’s sister. *she said, excited to meet the cheerful skeleton.*

Paps: *shakes Chara’s hand, and pokes her ribs playfully* Pleasure to meet you, Chara! Oh, by the way, Why haven’t you said anything about leaving so early Sans? *he asked the hoodie-wearing skeleton, turning abruptly towards him* I’ve been searching for you this entire time, because I thought you were sleepwalking again, brother!

Azzy and Chara started giggling at the scene unfolding right before their eyes, as the wacky skelebros went into an argue.

Sans: Well, you seem to have a BONE to pick with me. *he shot an answer back to his brother, making him angry about the pun he made.*

Paps: SANS!! I’M BEING SERIOUS HERE!! *he exclaimed in a shout, stomping his right foot on the ground furiously*

Sans: O c’mon, why’s your humor so BONE DRY? At least the kids found it HUMOROUS…

Paps: *storms off back into their house* AGH! COME BACK TO THE HOUSE WHEN YOU FINISH WITH THOSE TERRIBLE PUNS!!! *he screamed vigorously, and went into the house, slamming the door behind him.*

Chara: Is he always like this? *she asked, slightly confused at Papyrus’ reaction*

Sans: Yeah, he pretends to hate my puns, but I know deep inside he likes them. *he explained.*

Chara: You guys are so wacky! *she giggled out*

Gaster: Indeed we are. But only when we don’t have to be serious. *he said, smiling.*

They then proceeded to show Chara Snowdin town, and when they approached the tree in the center of the town, a yellow lizard monster wearing orange-yellow striped shirt approached them.

MK: YO AZ! *he said while running towards them, and tripping, falling face first onto the snow before Azzy and Chara.*

Chara: *kneels down to help him and see if he’s ok* Oh my god, are you OK? That looked like it hurt…

MK: *gets up onto his feet and smiles at her* Imma be fine. It happens a lot, since I don’t have any arms, but my face seems to have developed an immunity against the ground! *starts laughing*

Azzy: *giggling with his friend* Hahaha, yeah, MK smashes his face into the ground like that almost a hundred times during the day! Oh, by the way MK, that’s my sister, Chara.

MK: *notices that Chara is a human and gets really excited* Woah, you’re a human! That’s so cool! I’ve never actually seen a human before, except in comics… which I find often in the trash dump.

Chara: *giggles* Hehehe, I guess you really don’t get a lot of visitors. By the way, you look both cool and cute! *she said, smiling at the 7-yo lizard boy.*

MK: *blushes* U-um… I dunno what to reply to that, but thanks?

Azzy: *giggles* Hehehe! Someone finally said that, huh?

Chara: *turns to Azzy* But you are still the cutest, Azzy! *boops his snoot, making him blush deeply and sneeze a puppy-sneeze*

Azzy: Chara, no! Not in front of everyone! *he said, blushing even more.*

Sans: Oh, so that’s not the first time this had happened? How did I miss that? *he asked teasingly*

Chara: Asriel, but you really are the cutest! Just look at yourself! Who would hate such a big fluffball like you? *she hugs him after saying that, getting “d-aawwww”-s out of everyone. Asriel hugged her back*

MK: *walks up to Sans* Can I join you? I don’t really have anything to do now.

Sans & Gaster: Sure thing kiddo! Just beware of the “tickle monsters”! *Then they tackled him down onto the snow and started wiggling their fingers on his belly, sides and where his armpits would have been*

MK: NOOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHO!!!! EEEEEEEEEEEEEEEK!!! AHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA!!!! STOHOHOHOHOHOHOHOHOHOHOHOP, YOU BOHOHOHOHOHOHOHOHOHOHOHOHOHOHONEHEAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHADS!!! *he laughed out hysterically*

Papyrus: *appears out of nowhere* GREAT PAPYRUS TO THE RESCUE!! NYEHEHEHEHEHEHE!! *he uses his blue magic to lift Gaster and Sans up off off MK and grabs him, hugging him tight* I shall join you too, Brother and Father! Nyehehehehehe!

MK: *nudges Papyrus with his cheek on his face, showing affection* Thanks Papyrus!

The six of them all chuckled and then continued the journey through the Snowdin town, greeting all the Monsters that live there and they headed for the forest. MK, Azzy and Chara were throwing snowballs at each other all the way through the path leading to the Ruins entrance. They even stopped by the river to build a snowman, using both the snow and water, to make him very hard and durable. The kids were soaking wet and chilly by the time they could see the gigantic door in front of them, and Sans decided to teleport them all into the Ruins, so that the kids wouldn’t catch a cold. They stopped for a while in the old Dreemurrs’ place and the kids changed their wet clothes to some lighter wear, because the Ruins had a spring-like atmosphere everywhere, and it was nicely warm. MK had to throw off his neon-coloured sweater to dry it up on the the rack beside the fireplace Sans was lighting up at the time, leaving his torso to be bare. Asriel lent him some khaki shorts to change into, and he headed to one of the rooms for privacy. Meanwhile, Asriel and Chara talked with the Skeletons about what was gonna happen next.

Sans: We can take a break for some time here. We need to scout the Ruins to see if everything is safe there, and will leave you kids alone for some time, is that ok with you? *he asked, knowing that both Asriel and MK know this place very well and would find them if anything happened, and that the doors to the Ruins were sealed from the outside in a way that only the royal guards/family could open them, and were basically unbreakable, so no one could get in besides them, Undyne Asgore Toriel Gerson and the guard dogs, who were taking time off of their duty for now.* I know we shouldn’t leave you alone for quite so long as we’re going to be out, but I trust you kids will behave and nothing bad will happen. We made sure everything can handle any type of magic possible in this building… *he suddenly summoned a gaster blaster and shot a beam at the wall to prove his point, and pull a scary prank on the kids and Papyrus.*

The kids jumped into the air frightened by his sudden action, and Papyrus almost fainted.

Sans: *his permanent smile widens seeing the kids’ reactions* ...So you don’t have to be worried if any one of you has an outburst. Take care! *he teleports himself, Gaster and Papyrus out into Asriel’s old hideout, meeting up with Undyne to set up a party for Asriel and Chara’s belated birthdays.*

Asriel showed Chara around the place and the kids brought our some board games to play with, but after half an hour they were getting bored. Asriel and Chara suddenly had an idea. They decided to tickle MK senseless, but needed to get his feet and tail bound up, because for a little boy he was, he had quite some strength and was a HUGE wiggle worm, and they didn’t want to get kicked in the face or slapped by his tail. They thought about it for a while and decided to play “rescue”. The three of them went into an old bedroom, where they had a dispute about who wanted to go first, and Chara and Asriel, having already thought about that, decided to go from the youngest to the oldest of them.

Chara: *smiles at MK* So, this is how it’s gonna work. Me and Asriel are going to tie you down to this bed, and then we’re gonna pretend to be an evil spy trying to get information out of you, and a hero that’s going to try and rescue you. *she explained the made up rules of this game, nodding to Asriel*

MK: *getting both nervous and excited, sitting on the bed* Um, how are you gonna tie me guys? Like, I don’t mind that at all, but I can’t help to get a little bit nervous.

Chara: *turns towards him and smiles* You don’t have to worry about it. We promise not to harm you in any way. We’re just gonna tie your ankles together and your toes together too, then we’ll immobilise your tail and tie your torso down to the bed, so that you won’t be able to move or escape.

MK: *he seems to catch their drift as to what they are planning on doing with him like this.* Oh, OK. Are you going to tickle me? Because I wouldn’t turn down a chance like that to get Az for example!

Chara and Azzy: Maybe, maybe not.

Chara: *curiously asking him, because she knows he knows how it’ll end up anyways* But on the subject of tickling, do you like being tickled? Just curious, since you brought it up?

MK: *grinning widely, since he managed to bust their plans* Well, since I’m anyone’s prime tickle target, because I don’t have any arms, I do like being tickled, very much actually! It just brings me and anyone who tickles me closer. My parents also tickle me often, as do Alphys, Undyne and Papyrus. It’s just a very harmless and fun way to show someone you like/love them very much in a very simple and easy way in my opinion. But sometimes you have to find other ways to show that, since not everyone likes being tickled.

Azzy: *giggling* You have been ‘round Alphys for quite some time again, haven’t you? You sound just like her!

MK: *blushing a bit* Well, I love Aunt Alphys, and yeah, I’ve been at her place yesterday for a whole day and a sleepover. Undyne got me good there!

Chara: Oh, so Alphys is your aunt? Good to know, because I was going to ask you about it eventually, because you seem very much alike! *she said, smiling towards him.*

MK: Yeah, she is, and she’s great! She shows me anime and teaches me how to make origami, and overall science! *he said excitedly.*

Azzy: I agree! You will have fun when we visit her someday! But now MK, let’s tie you down and start playing!

The kids prepared some soft rope and tied MK to the bed, tying his waist and chest to the bed itself. Then they tied his ankles together and his big toes to the ankle-tie, and then tied it all to the bed frame. They turned him over and tied his tail to his legs. MK giggled all the time while his toes were being tied, immobilising his feet, and making him unable to scrunch his toes. Once he was tied, chara skittered her fingertips over the soles of his feet and he let out a surprised laugh.

MK: *feels Chara tickling his feet* EEEEEEEEEEEEK!!! HAHAHAHAHAHAHAHAHAHAHAHAHAHA!!!!

Chara: Hehe, sorry, couldn’t help it. Your feet are really ticklish.

Azzy: Yeah, but it’s nothing compared to his tail!

MK: Yeah, but I like it on both spots. My tail is the killer spot though! *he said, grinning widely.*

Then, Azzy and Chara initiated their plan. They pretended to fight over who will go first, who will be the “hero” or “villain”. They started by playing “rock, paper, scissors”, but they kept getting ties all the time. Then, Azzy “came up” with an idea to resolve this problem.

Azzy: Ok, so I’ve got an idea. Since MK is already tied up, we could make a contest. Whoever gets the best reactions from him wins, and becomes the “villain”. *He said, looking at MK, who started giggling from anticipation*.

Chara: That’s a great idea bro! But what are we going to be doing to him? *she asked, an Azzy laughed at her silly question.*.

Azzy: Well, MK said that he likes being tickled, so, how about we see who can make him laugh the most? Ah, wait, I forgot something! *He left the room*.

Chara: Hehehe! It seems like you’ll be getting tickled pink! Are you ok with that? I wonder what Azzy forgot to bring…

Asriel: *comes back with a bag full of something* I’ve got it!

MK: *Notices the bag and gets very nervous* Hey Az, you sure about using them?

Chara: Using what? *she asked, confused*

Azzy: *with a big grin on his face* The utensils!

He dumped the contents of the bag onto the bed beside MK, and Chara looked at them confused and shocked at the same time. There were some hairbrushes, shoe polishing brushes, scrub brushes, pipe cleaners, a wide variety of feathers and some toothbrushes.

Chara: What are those for? *she asked, very confused.*

Azzy: What? Have you never used any utensils or have been tickled with utensils before? *he asked her, seeing her confusion.*

Chara: No, I haven’t except for feathers. Do they really tickle? *she asked, curious.*

Azzy: Really?! Do you want to try some of them out? But I have to warn you, they tickle real BAD! *he asked her*

Chara: Why not? Afterall, we're going to be using them on MK, so I'd like to know what it will be like to get tickled with them. *She said, taking off her socks and putting her feet in Azzy's lap for him to tickle her with said utensils.*

Azzy: *smiling at his sister* Well, ok then. What would you like to try first? Maybe the pipe cleaners? *he asked her, showing her the two fuzzy looking strings with pretty long and fluffy bristles.*

Chara: Where did you even get all those things from? Has someone given them to you or did you buy them? *she asked, while examining the weird utensil she's never seen before*

Azzy: I just snatched some of them from home, and MK contributed to that some too.

MK: Yeah! I actually gave Az most of the brushes and feathers! They are killing me, but I somehow like them very much!

Azzy: *giggling at MK's statement* Oh really? Last Time I got you with them you told me to never use them again on you!

MK: Oh, you know mw Az! I always say things like that if something intense happened to me!

Chara: *Starts wiggling her feet impatiently* Hey, are you gonna show me how it feels like already or-

At that very moment, Asriel stick the pipe cleaner in between and around Chara's toes and started sawing it back and forth, which caused Chara to literally jump in surprise and start shrieking with hysterical laughter!

Chara: NOOOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOT?!!!! OHOHOHOHOHOHOHOHOHOHOHOHOHO MYHYHYHYHYHYHYHYHYHYHYHYHYHYHYHYHYHYHYHYHYHY GOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOD!!!!! IHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIT'S SOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHO BAAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAD!!!!!

Azzy: *grabs her ankle and keeps her from jerking her foot away from the apparently very tickly pipe cleaner* Woah! That's way harder reaction from the one I got out of you last evening!

MK: Oh, so that's why Aunt Alphys told me she heard weird noises coming from the lab!

Azzy: Yeah, We ended in the lab yesterday. And Chara got checked by Gaster, and she revealed that she really likes being tickled by her friends and family in a playful manner, and we tickled her into oblivion, and today she'll do the same to me! *he explained, putting the pipe cleaner away, and grabbing a shoe polishing brush with soft bristles* A bit of break and I'll get you with this little devilish thing, Chara.

Chara: *breathes heavily for a minute or so, then sits up and takes the soft brush from Azzy, feeling the bristles on the palm of her hand and realising she's in for something big this time.* Oh, I get a feeling that this will tickle a lot more than anything I've experienced yet!

Azzy: *stands up for a while to stretch his legs, so that they won't get sore or numb and notices MK fell asleep, and smiles mischievously, and whispered to Chara.* Hey Chara, MK fell asleep! Are you thinking about what I'm thinking?

Chara: *puts the brush away and stands up, to see that in fact, MK fell asleep tied down to the bed, and also smiled mischievously* You bet I am. Let's get him now, and I'll let you tickle me with the utensils next time!

The kids then took their positions, with Azzy sitting on MK's immobilised ankles and Chara sitting on his waist. Chara grabbed a couple of fluffy feathers and started gliding them up and down the yellow lizard boy's sides and ribs, occasionally making circles around his navel. These teasing tickles made the sleeping boy giggle and try to wiggle his body away, but the softrope holding him down to the bed by his chest made that impossible. His giggling would increase in volume whenever Chara got close to his belly button or his hip bones. That went on for a minute or so, and after that Chara and Asriel decided to wake the bound lizard boy up. Chara put away her feathers, and MK started to immediately calm down, still asleep. She then lightly placed her fingers on his sides, while Asriel prepared to tickle his feet.

Azzy: *wiggles his finger on Chara's sole to give her the "ok" to start tickling MK.* OK, now we strike!

Chara: *giggles and wiggles her foot away from her brother's finger, and starts drilling her fingers into MK's sides.* Wakey wakey, little MK! Heeheehee!

Azzy: *starts scratching his friend's soles of the feet with his claws, while also gliding his soft fur over them too.*

MK: *Wakes up almost immediately, and starts wiggling around, while laughing hysterically and boisterously* WHAAAAAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAT IHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIS HEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHE, GOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOING OHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHON?!!!! *he asked his two friends, trying to wiggle out of his bonds with all his might.*

Azzy: Oh, it's nothing MK! We just decided that it'd be a lot more fun to tickle you now. Oh, and remember that Sans and the others might come back anytime soon, so we just got right into what we discussed earlier, that is to see who makes you laugh the most!

The "kid" lied to his friend, because he just wanted Chara to help drive the 7-year-old lizard monster crazy with laughter.

MK: I WAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAS SLEEHEEHEEHEEHEEHEEHEEHEEHEEHEEHEEPIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHING!!! JUHUHUHUHUHUHUHUHUHUHUHUHUHUHUHUHUHUST WAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAIT UNTIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHILL I GEHEHEHEHEHEHEHEHEHET UNDYHYHYHYHYHYHYHYHYHYNE AHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAND ALPHYHYHYHYHYHYHYHYHYHYHYHYHYHYHYS TOHOHOHOHOHOHOHOHOHOHOHOHOHO GEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHET YOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOU BAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHACK!!! *He threatened the duo tickling him.*

Chara: Sure, you can get us bach, whatever. But now lie there and laugh for us, you cute little marshmallow! *She replied to him, unintentionally making him blush. She also started to claw-tickle his belly, getting cute, high-pitched squeals of laughter out of the boy.* Oh? I seem to have found your belly to be very sensitive to claw-tickling, huh? Kitchie kitchie koo, laugh for us, you adorable little MK!

MK: *He started laughing even harder, due to Chara's technique being very effective on his abdomen. He laughed so hard, that he actually couldn't speak anymore.* EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEK!!! NAAAAAAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA HEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHE!!!! STAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA~!!!!

Azzy: You're getting him good Chara! But wait until I do this! *He said, and drilled his fingers deep into the bases of his toes, and started switching between drilling hard under his toes or inbetween them, to which MK let out an ear piercing shriek of ticklishness, and that's without using an of the utensils yet!*

They didn't know they were being watched by Gaster the whole time. He knew that they were going to be tickling MK after they all left to prepare the playroom for The Kids' birthday party. He smiled to himself and continued helping Toriel, Asgore, Undyne, Sans, Papyrus with the preparations. (Alphys will show up at the party, but currently she is watching over the lab in The Hotlands.)

MK: *with Asriel digging into one of his weakest spots on his feet, he started shrieking with insanely loud, but joyful laughter.* NAAAAAAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA!!! AHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAZ!!! GEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHET YOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOUR FIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHINGEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHERS AHAHAHAHAHAHAHAHAHAHAHAHAWAHAHAHAHAHAHAHAHAHAHAHAHAY FROHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOM THEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEREHEHEHEHEHEHEHEHEHEHEHEHEHE!!!! EEEEEEEEEEEEEEEEEHEEHEEHEEHEEHEEHEEHEEHEEHEEHEEHEEP!!! *He managed to laugh out, and again fell into the sea of laughter, without being able to say any word anymore.*

Chara: Woah!! He's so loud! And his laughter changed! *She shouted over MK's laughter to Azzy.*

A couple minutes later...

Chara: Hey, Azzy, maybe we should give him a break!? *She said and stopped tickling MK*

Azzy: Yeah, you're right! We've been tickling him for almost 7 minutes now! *He said as he stopped tickling the 7-year-old lizard boy's feet.*

MK: HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAhahahahahahahahahaha! Heeheeheeheeheeheehee, Thahahahahahahahahahahahanks! Hehehehehehehehehehehehehehehe! *He giggled cutely, feeling phantom sensations on his feet and belly.*

Chara: No problem, you cute and adorable little MK! *she booped him on his nose like she does wit Azzy.*

MK: *He calmed down a little, and stopped giggling.* Aaaah! Don't do that! I'm gonna sn- *sneezes adorably, in a very high pitched voice, making Chara and Asriel giggle.*

Azzy: Just why do you keep doing that to everyone, Chara? *He asked his sister*

Chara: Everyone? Oh, come on Azzy, I did this only to you and MK, because I think you two are very cute! Especially you, brother! *reachews for Asriel's snoot, but ends up being caught by him, and having her arms pinned above her head.* WOAH! Wait, Azzy, what are you doing?

Add rest of text and make corrections
Azzy: Oh, nothing. Just showing you what might happen when you try "booping my snoot" in front of everyone! *He exclaimed, not really minding Chara wanting to show him affection in front of everyone. He sat gently on her wrists and rolled her turquoise-red t-shirt up to expose her belly, and started skittering his furry fingers all over it, occasionally poking her belly button, making her squeal with laughter.*
Chara: *Starts laughing heartily, and tries to wiggle away from her brother's hold.* AAAAAAAAAAAAAAAAAAAAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA AHAHZZEEHEEHEEHEEHEEHEEHEEHEEHEEHEEHEEHEEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHE!! STAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAP!!!! WEEHEEHEEHEEHEEHEEHEEHEEHEE SHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOULD BE TIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHICKLIHIHIHIHIHIHIHIHIHIHIHIHING MK!!!
Azzy: You know what, Chara? I actually think I like tickling you more than MK. Oh, by the way MK, do you wanna join me and tickle Chara? *He said to both Chara and MK, smiling cutely at his sister, while still tickling her belly, and making her kick her feet up in the air frantically as means of coping with the tickling.*

MK: You're sure? You two made plans to tickle me to oblivion now, and you now deviated from them?

Azzy: I'm sure Chara wouldn't mind that a single bit, would you, sis?

Chara: AHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHASRIEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEL YOHOHOHOHOHOHOHOHOHOU TRAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAITOHOHOHOHOHOHOHOHOHOHOHOHOR!!!

Azzy: Yeah, I love you too, Chara! *He teased her, knowing she didn't mean what she said. He then untied MK's bonds with one hand, keeping Chara in stitches all the time he released the boy.*

MK: Thanks Az! *He said, as he carefully made his way over to Chara's kicking legs, and proceeded to immobilise them, by catching her ankles in the air with his tail and sitting on her calves, facing towards her, which confused her a bit.
Chara: MK, WHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAT AHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHARE YOUHUHUHUHUHUHUHUHUHUHUHUHUHUHUHUHU DOHOHOHOHOHOHOHOHOHOHOHOHOHOHING?!!! *she asked the yellow lizard, confused.*
MK: Why, Chara, I'm preparing to return the favor by tickling your feet! *He said, and started slithering his scaly and rough tail all over the soles of Chara's feet, all while digging its tip in between her toes, making the girl shriek with laughter.

Chara: NOOOOOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHO!!! AAAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHE!!! MK, AHAHAHAHAHAHAHAHAHAHAHAZZEEHEEHEEHEEHEEHEEHEEHEEHEEHEEHEEHEEHEE, YOUHUHUHUHUHUHUHUHUHUHUHUHUHUHUHUHUHUHUHU AHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAREHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHE SOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHO GOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHONNAAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA REGREHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHEHT IHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIHIT!!!!! *She laughed out frantically and hysterically, while her face started turning red.*

The boys continued tickling her for 10 more minutes, with Azzy tickling Chara with various different techniques Asgore and Toriel often used on him whenever they were tickling the adorable fluffball. He started off teasingly counting Chara’s ribs, but he put his own little twist in there. Instead of normally counting the rib bones, he went “one” for the rib bone and then he poked and prodded in between the rib bones delicately, as to not hurt his sister, and there he went “One and a half” and so on. The maximum of ribs he managed to count before losing count was eight. When he finished tickling her ribs, he skittered his furry fingers inside her armpits, gliding his soft fur all over them and scratching in there lightly with his claws, and while he was doing that he managed to bend over her belly button and started blowing constant raspberries there. This caused Chara to screech loudly and laugh even more ferociously. MK managed to get the very tip of his tail to saw in between the poor girl’s toes, while still slithering it all over her soles. The poor girl lost herself in sea of frantic, heavy but still very exhilarating ticklishness, and for the rest of her “torture” she stopped struggling entirely, and just let the boys work their fingers and tail on her ticklish spots. This whole thing lasted about 15 minutes, and the boys let chara rest. The poor girl was a wreck! She was red in the face, pink on her belly and feet and was panting and giggling heavily. She calmed down in 4 minutes, and hastily got up and stormed out of the room straight to the bathroom. She left the boys sitting there confused at first, but after she didn’t return for 5 minutes they got concerned.

Azzy: *with clear concern in his voice* Hey, MK, do you think she’s alright? I think we went a little overboard with tickling her like that for so long.

MK: *biting slightly on his lower lip* Yeah, you’re right. We should probably go and check on her!

With that said the two of them got up and got out of the room. What they didn’t know was that Sans decided to check up on them and Chara was with him just waiting for them to do that exact thing! Sans, being the cautious and caring guy he is, was observing (alongside Gaster) the kids for the whole time since he and the rest of the group went out to “check The Ruins for threats and active puzzles”. He wasn’t angry at all, and in fact thought that the kids were absolutely adorable doing what they did for the whole time. Chara got him to help her get them bach, to which he happily agreed. When the boys left the room, Sans teleported himself and Chara into the room and locked the bathroom door. Now they just had to wait.

Azzy: *knocks on the bathroom door* Hey, Chara, are you alright? We’re sorry for this all, we went overboard!

MK: Yeah, exactly! *he said hastily, getting really nervous thinking she was mad at them.*

...But nobody answered...

The boys were freaked out by now. They tried going into the bathroom, but they found the door was locked. Suddenly, Sans popped out of nowhere, looking about to faint.

Sans: Hey, *huff* don’t wanna worry you, *puff* but you should go back to the room, quick!

MK and Azzy: *Now completely frightened, with tears starting to form in their eyes* SANS! What’s happening? Are you alright?

Sans: <OMG they caught the bait> I’m fine, but Chara...

As soon as they heard that, the two frightened boys rushed back to the room with lightning speed, and when they entered, they almost fainted too when they saw Chara laying face down on the ground in the middle.

Azzy: *Tears are now freely flowing down his cheeks* CHARA! SISTER! ARE YOU ALRIGHT? *he shouted as he rushed to her side and kneeled beside her, turning her over to her side.*

...But she didn’t answer...

Asriel turned her over, so that now she was lying on her back, and she felt completely limp. He and MK started shivering heavily and sobbing loudly at this point, which Sans didn’t really expect, and broke the prank.

Sans: Heh, impressive, Chara. Don’t worry boys, she’s alright, she just wanted to prank you for going a bit too harsh on her while you were tickling her, hehe. *he said as he started comforting the two distressed boys.*

Azzy: *still in shock* B-b-but S-sans, She’s still not waking up!

After hearing that, Sans got seriously concerned, and turned back to where she was, but she was GONE!

Sans: *now literally shaking himself* Chara!? Kiddo where are you? That’s going too far now! We’ve scared them more than enough!

...But she wasn’t there...

Sans was now really concerned, and was starting to get a bit angry. He kept Asriel and MK close by his side. The poor boys were still shivering, but they were starting to calm down, while Sans was also kinda calming down, but he was still very alert.

Sans, MK and Azzy: Chara, c’mon, this isn’t funny at all! *They all said, getting a little bit annoyed*

Just after they said that they heard light giggling coming from all around them, and a loud “THUMP” sound coming from the hallway. They looked at each other uncertainty, and Sans guided Azzy and MK to stand right behind him, very close, and took Asriel’s hand, and they all started walking out of the room, and the corridor. While they were walking the lights flashed and went out, leaving the place uncomfortably dark and making them all jump a little bit. Sans stopped, and stood there, listening carefully. it was very, very silent. He tried calling Chara again, now getting actually annoyed by what she was doing, but she didn’t show up. It took him a little while to realise that Asriel had let go of his hand, and that he and MK were gone too. It was hard to see in the darkness, but he managed to find his way back into the kid’s room. The lights turned back on, and he teleported back into the hallway.

Sans: *while smiling, knowing that the kids must have been taken by Chara and they were all pulling a prank on him.* Hey, kids, lok, now I see what you all are trying to do, you can come out of your hiding, or else I’ll get Gaster and Papyrus to give you one hell of a tickle punishment. *He said, knowing that with al three of them absolutely loving being tickled, the punishment would actually be just a fun way to show them just how much they all care about them.*

...But nobody answered...

Sans decided to look around for them, to see what they have come up with for him. He checked every room and closet he could find, and noticed that MK must have put his sweater back on, because it was gone from the rack near the fireplace. He knew now that the kids must be hiding somewhere outside, and he exited the old home, when suddenly...

Chara, Asriel and MK: *they approach Sans from behind, and carefully and delicately knock him down and pin him to the ground, scaring the skeleton in the process* AND DOWN YOU gO!!

Sans: *screams, and starts struggling to get free from the kids pinning his arms and legs down to the ground* AAAAAAAAAAAAAAAAAAAAAAAAH!!!

The kids: *They start laughing heartily at his reaction, but still hold him down.* HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA!!! WE GOT YOU! WE GOT YOU SANS!!

Sans: Well, I definitely didn’t see that coming. Now can you let me get up please?

Azzy: Nope!, We’re planning to get you back for all those pranks you’ve pulled on us!

MK: Yeah! That’s the perfect payback for all those times you popped up from nowhere and started tickling us in public! *The young reptilian exclaimed joyfully*

Sans: *Getting nervous* W-wait kids! Y-y-you aren’t g-g-g-onna tickle me, a-are you?

Chara: *smiles widely at him, sitting on his waist* Well, what does it look like to you? Why on earth would I let Azzy and MK miss out on such an opportunity! They told me about how you always pranked them while you were searching for us, and decided to help them get you back!

The kids took their positions, with MK holding Sans’ ankles together with his strong tail, Asriel sitting on Sans’ elbow joints, immobilising his arms, and Chara sitting down on Sans’ waist. She rolled up the skeleton’s light blue t-shirt, exposing his ribcage, and lifted his navy-blue jacket enough to expose the sleeves of the said t-shirt. The kids didn;t know if he was actually ticklish or not, but they gambled on yes.

Sans: *Now really starting to struggle, being so nervous he can’t concentrate enough to teleport away from the kids.* You are so going to regret this, you know kiddos? Do you even know whether I am actually ticklish or not?

Azzy: *smiling at his favourite skeleton friend* Well, guessing from your reaction and nervousness I guess you are very ticklish, Sans. But Do you like it though? I mean, We don’t wanna make you uncomfortable or hurt you in any way.

Sans: *Now he calmed down a bit, knowing he might get away from this situation.* Well, just for your information, ok I’m very ticklish. In fact, almost as ticklish as you are, Asriel. But the thing is that I don’t really like it. I may let you tickle me one day, but I just really need to know if I can trust you with it, because it’s very easy to overdo it in my case. *He said truthfully, and the kids immediately got up off him and helped him get up off the ground.

The kids: Oh, we didn’t know that! Sorry!

Sans: *hugs the hids tightly* It’s no problem, but I’ve gotta say yo got me good there, hiding away like that! Oh, and I hope that you keep the information about my ticklishness only to yourself, because as I said, it’s complicated as how I relate to that, but nobody except you, Gaster and Papyrus know about it now.

Chara: Really? I mean, do you trust us enough to let us know that sort of information? *she said, really surprised, and Azzy and MK agreed with her.*

Sans: Well, I’ll be keeping an eye socket out on you three to make sure you won’t leak it, and I warn you now, when you do leak it I’ll know it, and you are all gonna have a very hard time regaining my trust in you, am I clear enough?

The kids: Yes, we’ll keep it only for ourselves, promise! *They all said, very happy to know Sans trusts them so much, and they won’t give the information away to anybody until Sans says it’s alright to do so.*

Meanwhile, Gaster has seen the whole ordeal, and has been absolutely astounded when he heard Sans’ confession to the kids, but found it really heartwarming that he trusted them so much and that they understood him and decided to keep this whole thing only to themselves. The place was now ready for the party, and they all were about to go bach for the hids, but he decided to have everyone stay there and he teleported himself to where they all have been now.

Gaster: *teleports next to Sans and the kids* Hello again children!

Azzy: Gaster! *he exclaimed excitedly* What brings you there so suddenly?

Gaster: Well, young prince, I’ve come here back from the scouting, and we can safely continue travelling through the ruins.

Chara and MK: That’s great! Let’s go already! *they both said excitedly*

The five of them then continued showing Chara the way around The Ruins, and they took her all the way back to where she had fallen two days ago. The girl looked up, and let out a surprised gasp, seeing how high up the hole she fell through was. She was absolutely astonished that she was still alive from that fall.

Sans: Ok, so that’s where The Underground ends, Chara. *He said smiling at the girl*

Gaster: indeed it is. It’s also the only uncovered entrance into the mountain. The barrier is the only way out of there, but it’s unbreakable, because it was created by the warlocks with SOULS of pure seven traits, Determination, Bravery, Justice, Patience, Perseverance, Integrity and Kindness. *He said, explaining to Chara why and how the Monsters are trapped underneath Mt. Ebott.*

Chara: And I’m carrying one of those traits... *She said, looking down at the ground.*

Azzy: But Chara, none of this is your fault! *He said reassuringly after seeing his sister being sad.* You should actually be very proud of yourself! I know that Determination is the most powerful of all of those seven traits!

MK: *Shocked with Chara having the trait of Determination* YO! That’s so awesome! You’re going to be a great wizard one day!

Chara: *perks up a little, but then starts crying a little bit* B-but I can’t even control any of my powers! And all of those that showed up were devastatingly destructive!

Sans: *snaps his fingers and lifts Chara up with his telekinesis, and moves her into his hold, and begins comforting her* Hey, shush now... There’s no need for those tears. If you continue crying like that we’ll probably have to SWIM back to the castle! *he said to her.*

Chara: *giggles, but can’t stop tears from streaming down her face*

Sans decided to help her calm down a bit. He snapped his fingers again, and lifted her, MK and Azzy up into the air, quite high, and started flying the kids like airplanes! Azzy and MK giggled, as Sans made the two cute boys chase Chara all around the cave, and Chara was startled at first, but she soon started laughing and giggling with MK and Asriel, as Sans made them do barrel rolls and making them dive up and down at high speeds, being careful to stop them high enough so that they don’t hit the ground. When he finished, he held the kids just barely above the ground, and made them do pirouettes at moderate velocity, making their heads spin, and when he put them back on the ground, the kids stumbled around for a bit and then collided into each other and fell onto a pile, and started giggling maniacally. Gaster and Sand smiled widely at the cute scene. When the kids got up, they hugged Sans and Gaster tightly.

Gaster: *winks at Sans* Alright, that’s the end of the Underground, but we have one more thing to show you Kids.

The kiddos looked at each other confused.

Azzy: But, I thought we showed Chara all there is to show her. Is there something we missed? *He asked the skeletons, tilting his head to the side cutely as he did.*

Sans: *Starts petting his head.* Well, there is one place YOU left out, let’s get you three kiddos there.

Asriel perked up when he heard that, but was surprised that Sans and Gaster knew about this place. Sans gathered the kids and Gaster teleported them to Asriel’s “secret hideout”. It was dark there, which scared the kids a bit, but not as much as it confused them.

Azzy, Chara and MK: *All at the same time* Gaster? Where are-

Just before they could finish their question, the lights went on.

Sans, Gaster, Papyrus, Toriel, Asgore, Undyne and Alphys: Happy Birthday Asriel and Chara! *They all shouted excitedly, and Papyrus released a pile of colorful confetti out of his telekinetic hold, spreading it around the room.*

The kids were startled so much by this they jumped up, but then Asriel and Chara started crying tears of happiness. Asriel was crying because he was happy, but Chara was crying for whole other reason. The thing is that she never had a birthday ever since she was four, and she lost her parents. She didn’t even remember when she was born. The two of them ran toward Toriel and Asgore and hugged them tightly. The two parent boss monsters returned the hugs, and started comforting their children...