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while you're sleeping

Summary:

He asks himself, why would Izuku want a girlfriend in the first place? What would make him want to date someone? What can some girl give him that Katsuki can’t?

And then Katsuki figures it out: nothing.

There’s nothing Izuku can get from a girlfriend that he couldn’t get from Katsuki. If Katsuki can just give him anything that a girlfriend would, there’d be no reason for him to go looking for those things anywhere else, right?

Notes:

Obligatory "there's nothing morally righteous about this story, do not try at home, author does not support contents of fic irl, blah blah blah" warning here.

Just read the tags, babes, because I can't come to your house and read them for you.

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Katsuki would say he doesn’t mean to eavesdrop but he’d be lying.

It’s the morning after another night spent at the Midoriya household – another night of Izuku watching him while his parents are out to dinner, a night filled with Katsuki needling him into playing the video games that his mother had told Izuku he’s not under any circumstances allowed to play and crawling into Izuku’s bed at a time that’s about two hours later than what his curfew is supposed to be to hog all of Izuku’s covers even though Katsuki brought his own sleeping bag with him and Izuku put up the usual token protest over it, saying “Kachan...” in a plaintive tone that Katsuki knew meant Izuku was going to let him get his way.

So, a normal night. Just like a thousand others.

Except that the next morning when Izuku is pouring Katsuki a bowl of the extra sugary cereal he is absolutely not supposed to be eating after much less poking and prodding Izuku for it than usual, something that has Katsuki feeling mighty proud, Aunty Inko comes into the kitchen and says something that’s very much not part of the usual routine.

Oh, Izuku! That girl from your class called yesterday and left a message! She wanted to know if it’s alright for her to come over and study this weekend. I told her I’m fine with it, of course, but I told her you’d call her back to give her a definite answer. I would have told you yesterday but you and Katsuki were so busy having fun, I didn’t want to interrupt!”

And Katsuki doesn’t like the sound of any of that already because the weekends are always his time with Izuku, more than just overnight visits where he had a limited time between getting out of school and having to go to bed – because while he could get Izuku to let him stay up later than he should, he still hadn’t managed to let him stay up all night ( yet ) – but two whole days where he had Izuku almost totally to himself, minus the time Aunty Inko was around them.

But then Izuku is flushing, his freckled cheeks turning bright red in a way that has Katsuki pausing mid-bite of cereal, the spoon hanging limply from his hand, to stare at him.

Mooom...” Izuku whines, turning to put the box of cereal back in the cabinet and hiding his blushing face from view in the process.

Aunty Inko laughs at his turned back, shaking her head. “Come now, ‘Zuku, no need to be embarrassed. It’s about time you got a girlfriend, don’t you think?”

Izuku groans, banging his forehead dramatically against the cabinet, while Katsuki frowns down into his bowl behind him.

No, Katsuki thinks. He doesn’t like the sound of any of that at all.

 

//*********************************//

 

Katsuki isn’t stupid, okay?

He might only be twelve but he’s got the internet and tv, he’s seen porn on his own and watched it on the screens of other boys’ phones in the school locker rooms, he’s jerked off , and he knows half his classmates are already dating or wish they were. Some of them even claim they’re already having sex, though Katsuki thinks half of them are probably lying to sound cool if not ever y single one.

So Katsuki gets that if all that’s going on for him and his classmates at twelve , there’s nothing weird about an eighteen year old like Izuku doing the same stuff or more.

Eighteen year olds dated and eighteen year olds fucked , Katsuki would have to be a moron not to know that and Katsuki’s no moron.

The thing is, he never actually thought Izuku would be one of the ones doing any of that. Katsuki had thought, naively, that Izuku would never get a girlfriend, would never have sex with some random classmate he had, would never go off and get married or anything stupid like that.

Katsuki always thought Izuku would remain completely and totally his , that he would never have to share him with anyone else, and Katsuki is finding his world a little bit rocked at the idea that that might not be true .

Izuku had been in his life for as long as he could remember, some of his earliest memories featuring Izuku’s green hair, freckled face, and big smile, his happy voice calling Katsuki Kachan as he let Katsuki lead him about and did pretty much whatever Katsuki wanted him to do even though he was older because he cared about Katsuki, he loved him, and he wanted Katsuki to be happy. Izuku’s love and affection w ere so bright and warm and overflowing and Katsuki, so greedy for attention and praise, soaked it up like a flower in a drought and never stopped wanting more .

When Izuku got old enough that Katsuki’s parents started letting him look after Katsuki, the extra time spent together only cemented for Katsuki even more that he never wanted any of that to end, that he wanted Izuku to always be there for him, to be his , for the rest of his life.

And for years, Katsuki had the utmost faith that that desire – like almost all other things he asked for from Izuku, save for being allowed to stay awake all night – would be one that was granted to him.

Now, he isn’t so sure that’s true and he hates it .

Was Izuku already dating that girl Aunty Inko was talking about?

Had he already had sex with her?

Was Izuku going to cancel their usual plans this weekend to go out with her?

Just thinking about it makes Katsuki burn with anger, the thought of Izuku spending his free time with anyone other than him making his throat feel tight and his belly churn like he ate something rancid, the thought of Izuku eventually leaving Katsuki for someone else ---

Well, it was completely unacceptable.

It wasn’t going to happen.

It wouldn’t .

Katsuki would n’t let it.

 

//*********************************//

 

The first thing Katsuki decides he needs to do is scope out the situation. Investigate a little.

He does this by waiting until Izuku has just taken a bite of dinner the next night and asks him point blank, “Do you have a girlfriend?”

Izuku chokes and stares at him with wide, bugged-out eyes.

Katsuki kindly waits until he’s stopped coughing and is done wiping at his mouth with a napkin to press again, “Well, do you, Deku?”

Why would you ask me that, Kachan?” Izuku looks at him in askance, like he’s just asked the most ridiculous question in the world.

Katsuki shrugs, playing it nonchalant. “The way Aunty Inko was talking yesterday morning about that girl you go to school with, I just wondered.”

Izuku shakes his head and laughs, a light blush across his cheeks that Katsuki can’t help but focus on again, just like he did the other day . “Ah, mom was just teasing me, Kachan. That girl is just a classmate, she’s not my girlfriend.”

So you’re not going to blow me off this weekend to study with her?” Katsuki tries not to sound whiny and think he mostly manages, but he still can’t help but scowl at the thought of Izuku abandoning him, whether the person he’s doing it for is his girlfriend or not.

Izuku notices his mood. H e smiles at Katsuki softly, reassuring. “I wouldn’t blow you off for some girl, Kachan. I like spending time with you too much, I wouldn’t do that to you.”

And Katsuki is pleased at his words , he is , but they still don’t totally erase his worries.

But that’s not always going to be true is it?” His scowl deepens, just thinking about it. “You’re going to go off to university and you’ll get a girlfriend or something eventually, right?”

Well...I’m planning to go to a school close to home so we’ll still see each other and...I’m not planning on dating anyone any time soon---”

But someday you will?” Katsuki presses, holding Izuku’s gaze and demanding an honest answer.

Izuku keeps smiling at him, reaching across the table to take one of Katsuki’s smaller hands in his. His hand totally engulfs Katsuki’s and the warmth of his skin is...nice. Katsuki likes it. It makes him feel warm in more than just his hand, but also his face and chest and the pit of his stomach.

Kachan, even if I get a girlfriend or---or a wife someday, I’m still always going to be there for you. I promise, okay?”

Izuku means the words to be a reassurance but they fall flat to Katsuki’s ears.

Izuku’s words don’t reassure Katsuki at all.

 

//*********************************//

 

Katsuki knows what he needs to do: stop Izuku from ever getting a girlfriend . If he can do that, then Izuku will stay with him and won’t leave to be with anyone else. It’ll just be Katsuki and Izuku, Deku and Kachan, like it is now and like it should always be, and Katsuki can be happy and content with the fact that Izuku belongs to him and nobody else.

It all sounds simple enough but Katsuki is smart enough to know that it’s easier said than done.

He could just demand that Izuku not date anyone, now or ever, but Katsuki is pretty sure Izuku would just laugh that particular demand off as a childish whim.

And Katsuki might still be a child but he’s not child ish .

No, getting what he wants this time is going to take more than just asking Izuku for it. He’s going to have to think about this, plan it out, be smart about it.

He asks himself, why would Izuku want a girlfriend in the first place? What would make him want to date someone? What can some girl give him that Katsuki can’t?

And then Katsuki figures it out: nothing.

There’s nothing Izuku can get from a girlfriend that he couldn’t get from Katsuki. If Katsuki can just give him anything that a girlfriend would, there’d be no reason for him to go looking for those things anywhere else, right?

It’s not like he’d have to force himself into going through with it, anyway.

Katsuki has been jerking off to thoughts of Izuku since he was ten. Taking it a step further would be no skin off his back at all and if it meant Izuku would be his, always and forever?

Katsuki is prepared to do whatever is necessary to make that happen.

The fact that he’ll probably enjoy what he’s gotta do is just icing on the cake.

 

//*********************************//

 

Once Katsuki sets his mind to something there’s very little that can be done to stop him from getting done what he plans to get done or getting from a person what he wants from them .

A lifetime of experience in trying (and succeeding) in getting what he wanted from Izuku in particular only helps him now that what he wants is a bit more heavy than just playing violent video games or staying up a couple hours later than he’s supposed to.

Katsuki does what he always does when he wants something that he knows he won’t get just by asking nicely : start slow, ask for something little at first and then work his way up to the big thing he really wants.

In this particular endeavor, his first starting point is holding Izuku’s hand.

This he doesn’t ask for. He just waits until Izuku is walking him home from school one day and he grabs Izuku’s left hand with his right, interlacing their fingers together, all without saying a word or acting like what he’s doing is anything out of the ordinary at all. He can feel his heartbeat pounding in his chest hard enough that he can feel it in his throat but he makes an effort to appear totally calm on the outside and he’s positive it works.

Izuku falters in his stride and looks at Katsuki from the side with a confused little smile on his face but he doesn’t say anything when it becomes clear Katsuki isn’t going to voice why he just interlocked their hands together like he hadn’t done since he was in Kindergarten.

Izuku just squeezes Katsuki’s hand once and lets their joined hands swing between them as they walk all the way back to the Midoriya home and Katsuki only lets go of Izuku’s hand when they have to detach in order to take off their coats.

Katsuki keeps his smirk to himself and silently counts this as his first win.

 

//*********************************//

 

The thing is, this plan of Katsuki’s? I t’s not even hard to get Izuku to unknowingly go along with it .

Katsuki had never really noticed before how tactile Izuku is or how much physical affection was already present in their relationship until he purposefully decided to be affectionate and noticed there really wasn’t as much work cut out for him as he thought there’d be.

It’s easy to get Izuku to run his hands through Katsuki’s hair when they’re sitting next to each other when Izuku is already used to ruffling it at will .

It’s easy to crawl into Izuku’s lap while they watch tv when Izuku is already used to having Katsuki pressed up against his side.

It’s easy to curl up right on top of Izuku’s chest on the nights he stays over when Izuku is already used to having Katsuki push his way into his bed to sleep for the night .

It’s so easy to take the affections Izuku already gives to Katsuki and take them just a little bit further , make them just a little more intimate.

Izuku always responds the same way – bewildered and yet seemingly pleased , happy to allow Katsuki these new little acts of closeness, and once the initial confusion is gone, the acts don’t seem new anymore. They fold easily into Izuku and Katsuki’s regular routine until it’s like they were always there to begin with.

It makes Katsuki confident that ultimately he’ll get what he wants.

It makes him bold enough to take his plan to the next level sooner than expected.

 

//*********************************//

 

Izuku has always been a heavy sleeper but he also always wakes up at the same time every morning like clockwork, so routine you could set an alarm by him, and this is knowledge Katsuki fully plans to use to his advantage.

He borrows his mother’s cell phone before he’s sent off to the Midoriyas for the night – borrows, he thinks, not steals, he’ll put it back when he gets home and it’s not like his mother uses it often anyway, he doubts she’ll miss it before he gets home – and sets the alarm on vibrate for half an hour before the time Izuku always gets up, keeping the phone hidden away in the waistband of his sleep pants.

He and Izuku crawl into bed together that night, Katsuki curling up right against Izuku’s chest and Izuku’s arm coming to wrap around him as their routine goes now, and Izuku murmuring a low g’night kachan in Katsuki’s ear, before they’re both drifting off to sleep.

T he next thing Katsuki knows he’s startling awake from the phone vibrating at his lower back, causing him to flinch back away from where Izuku is pressed warm and flush against him and scramble to pull the phone out of his pants and turn the alarm off. He does so and then cautiously reaches over to the lamp on Izuku’s bedside table and turns it on to the lowest setting.

In the dim light, Izuku lays curled on his side, his body facing towards Katsuki, his mouth half open and a little bit of drool pooling out onto his pillow, one arm resting between the pillow and the mattress and the other on the bed in the space between Katsuki’s body and his.

He looks completely, peacefully asleep and --- darting a look at the time on the phone --- Katsuki figures he’ll stay that way for another twenty minutes if he stays true to how he’s always been.

Katsuki lets out a shaky, excited breath and sits the phone carefully down on the bed, and with tentative hands, reaches out to touch the waistband of Izuku’s sweats. His fingers dance along the top of them for a few seconds before he tells himself to stop being a wuss and, without further ado, lowers his hand into Izuku’s pants to grasp his cock and pull it out, totally visible to Katsuki’s eyes .

It’s big, is the first thing that Katsuki thinks.

Not as big as some of the cocks Katsuki has seen in porn but definitely bigger than Katsuki’s own, the size looking especially exaggerated considering Katsuki’s small, still child-like hands. Katsuki rubs one of those hands hand up and down the shaft of it, liking how smooth and velvety the skin feels, trying to mimic the motion that he knows he likes to feel on his own cock, and with the other hand he reaches further down to cup at Izuku’s balls, also bigger than Katsuki’s, and rubs gently at them, too.

He watches with hawk-like eyes as Izuku’s cock fills out and hardens in response to his touches, as Izuku’s hips start making little thrusting motions, actually fucking into Katsuki’s grip, pre-cum dripping steadily from the head. When Izuku lets out an audible moan, Katsuki startles and tears his eyes away from the cock to dart up to Izuku’s face but breathes out a sigh of relied at seeing Izuku’s eyes still shut, still sleeping albeit with his brows drawn down and face scrunched up in...pleasure.

Pleasure that Katsuki is giving him.

Katsuki keeps his eyes glued to Izuku’s face as he keeps jerking off his cock and watches, enraptured, the way Izuku bites at his pillow, the way the hand resting under his head fists at the sheets, the way Izuku’s whole face quivers and contorts almost like he’s in pain .

But what Katsuki likes most isn’t even what Izuku looks like but how he sounds – he moans all loud and drawn out, he whimpers like a dog, and when Katsuki squeezes a littler harder right at the head of his cock, Izuku actually makes a sound like a cry and thrusts his cock harder into the motion like he wants more of it, like he likes it when it hurts.

Katsuki wonders if his eyes were open whether they’d be glazed with tears. His own cocks throbs painfully in his pants just thinking about it.

Katsuki’s only reminded that he has a time table to stick to when Izuku’s eyelids start fluttering and his moans start sounding a little more wakeful than they should and so, with quick and careful motions, Katsuki puts Izuku’s wet, throbbing cock back in his pants, turns the bedside lamp off and tucks the phone back in his waistband.

Then, just as he planned, he curls himself up nice and tight right up against Izuku. He takes Izuku’s arm and drapes it over his body, making sure the Izuku’s hand rests firmly on his ass, and he throws his own leg over Izuku, squirming around until they’re positioned perfectly for Izuku’s now pants covered cock to be pressed right against Katsuki’s own.

With a smirk, Katsuki closes his eyes and begins to slowly rut his cock right against Izuku, biting back a moan of his own at how good the motion feels, how much he likes the feeling of a hard cock thrusting against is own.

It isn’t long before Izuku’s unconscious body, already worked up from Katsuki’s earlier treatment, is rutting back against Katsuki, Izuku’s arm tightening around Katsuki’s waist and his hand squeezing lightly at his ass just like Katsuki hoped it would.

Katsuki keeps his leg tightly wrapped around Izuku’s hip and his arm thrown around Izuku’s torso in something like a hug, his eyes clenched shut tightly as he and Izuku fuck against each other, little punched out breaths escaping Katsuki’s mouth as Izuku whimpers right into Katsuki’s ear, his thrusts getting harder, rougher, more and more erratic , his grip on Katsuki tightening so much Katsuki thinks he might bruise , and the thought of that , of having Izuku’s marks on him, is what finally makes Katsuki let out a choked out cry, his hips stuttering and limbs spasming where they’re wrapped around Izuku, as he comes right in his pants.

Izuku keeps thrusting against Katsuki right through it and for long moments after , his still hard and desperate cock pounding against Katsuki’s spent one, making him mewl pathetically at the overstimulation into Izuku’s chest as he just holds on to Izuku and rides it out, letting Izuku’s sleeping body continue to use him like a fuckdoll until he comes.

Katsuki knows the moment Izuku wakes up.

Izuku lets out a very loud, very vocal, very awake cry. His arm suddenly goes tense around Katsuki’s body, his hand grabbing a handful of Katsuki’s ass and squeezing at the flesh for all its worth, as he gives a few more jerky thrusts against Katsuki and then finally comes , his hot breath panting out rapidly right against Katsuki’s skin, his hips stuttering until they finally stop their movement completely.

Katsuki just keeps his eyes closed, makes sure his breath is even, and plays possum for all he’s worth.

He doesn’t panic about Izuku waking up.

Why would he?

This is exactly what he wanted to happen.

Izuku just pants quietly into Katsuki’s ear for what feel like the longest few seconds of Katsuki’s life before his entire body goes completely tense, his breath hitching.

Ka—kachan?” Izuku whispers, the blatant shock in his voice as clear as day.

Katsuki doesn’t answer him, of course. He just continues to pretend like he’s sleeping.

Izuku’s hand releases its grip on Katsuki’s ass a second later like it burned him and Izuku quickly, but gently , slides Katsuki’s leg off of his body and moves Katsuki away from him, moving even faster after that, jumping off the bed while murmuring quietly to himself, “Oh god, oh god, whatdidido, fuck fuck---”

Katsuki hears his feet almost running out of the bedroom and towards the bathroom, then the sound of the shower starting up a second later.

Katsuki lets himself open his eyes then and stretches his limbs out on the bed, smirking happily when he feels the wet come all tacky and sticky at the front of his pants.

He thinks he’ll sleep in late this morning, he’s sure Izuku will let him.

Besides, Katsuki thinks, he’s earned it.

 

//*********************************//

 

When Katsuki does finally pull himself out of bed in the morning, he stumbles into the kitchen to find Izuku already sitting at the counter with his head buried in his hands. He looks up when Katsuki walks in, though, and he looks---

Wrecked.

There’s no other word for it.

Izuku’s eyes are red-rimmed like he’s been crying, his face paled and drawn, and he looks at Katsuki with a look of such pure shame in them with a good helping of concern.

Katsuki thinks he should probably feel guilty about what he did now, that this should be the moment he rethinks what he’s doing and understands that it’s wrong .

But Katsuki doesn’t feel guilty.

He just looks at Izuku’s red eyes, the lip he has caught between his teeth, and the hands he has clenched into fists on the table like they’d been clenched in the sheets and on Katsuki’s ass before and all Katsuki can think is, I did that.

I made him look like that.

It isn’t guilt that Katsuki feels about the thought, but pride .

He has to force himself to appear and sound nonchalant as he smiles at Izuku, brushing by him and ignoring how his whole body flinches from the minute contact, on his way to the cereal. “Morning, Deku.”

Izuku is silent for a long moment as Katsuki gets out a bowl and spoon. When he finally does respond, his voice is low and shaky. “G-Good morning, Kachan.”

Katsuki looks over to Izuku at the tone and finds Izuku looking right at him already, his gaze searching. “Are you like, sick or something? You’re acting weird.”

Izuku just keeps staring at him.

Katsuki frowns and leaves his cereal on the counter, walking with purpose up to Izuku until they’re nearly pressed flush along the front. He ignores how tense Izuku’s body gets on his approach like he doesn’t notice it and stands on his tippy toes to reach a hand up, sweeping back Izuku’s hair to press the flat of his hand against his forehead.

Izuku’s body is so deathly still Katsuki would swear he wasn’t alive if he wasn’t close enough to hear Izuku’s rapid breathing himself.

I’m doing that . Katsuki thinks again and he pushes down the urge to smirk and forces himself to just keep frowning in concern instead.

It doesn’t feel like you’re running a fever but maybe you should get Aunty to take out the real thermometer and check with that.

Izuku stays tense for another few seconds but then his body is relaxing, ever so slightly, and his lips are forming in a wobbly smile at Katsuki’s show of concern.

I’m—I’m fine, Kachan. I don’t think I’m sick, but thank you for caring.” He pauses and then with a voice filled with worry asks, “And...you, Kachan? Are you feeling alright? You don’t feel...sick this morning?”

Katsuki holds Izuku’s gaze for a minute and he can practically feel Izuku’s anxiety like it’s a living, breathing creature in the room with them.

I could crush him right now. Katsuki thinks. I could tell him I woke up to him fucking against me like I was a toy, I could tell him I hated it, I could tell him I’ll tell people, I could break him right now.

The power Katsuki holds over Izuku in this moment is so heady, he can practically taste it.

And Katsuki likes it .

He likes it a lot .

But as good as having power over Izuku feels, Katsuki doesn’t want Izuku to be broken , he wants Izuku to be his , and so he lets the moment break instead of Izuku.

He smiles, slow and easy, and watches the way Izuku’s eyes drop down to his lips to cat a log the expression. “I feel great .”

Izuku’s eyes jump back up to his, confused. “You...you do?”

Katsuki shrugs and turns to go back to preparing his cereal. “Yep, I dunno what was different about last night but I feel more well rested than I have in like... ever .”

Izuku looks at him with a lost expression in his eyes, but Katsuki can tell that there are also signs of relief there.

Relief that he hadn’t hurt Katsuki.

Well, that’s...” Izuku lets out a shaky, nearly hysterical laugh that cuts out almost as soon as it starts. He clears his throat nervously. “That’s good, Kachan, I’m...I’m glad you’re feeling good.”

Katsuki pours his milk and looks at Izuku as innocently as he can manage. “I always feel good when I’m in your bed, Deku.”

Izuku barely manages to muffle the strangled noise he lets out.

Katsuki pretends not to hear it, it’s more fun that way. “Your sheets are way softer than mine, I don’t like sleeping without them.”

Izuku looks at him in wide-eyed disbelief and Katsuki takes a bite of cereal and thinks, This is going to be a piece of cake.

 

//*********************************//

 

Izuku is, predictably, much less easygoing about letting Katsuki share his bed the next time he sleeps over.

Katsuki expected this. He prepared himself for all of Izuku’s arguments and has come up with a thousand and one ways to work around them.

That doesn’t change the fact that it’s still pretty damn annoying.

Kachan, I just---” Izuku lets out a frustrated sigh, standing by the bed while Katsuki lays down in it, covers already pulled over him, and refuses to leave. “I don’t know if it’s...okay for you to sleep here. With me.”

Katsuki squints up at him. “What are you talking about, Deku?”

Izuku runs a hand roughly through his hair. “I mean, I don’t know if it’s...comfortable. For you.”

Katsuki lets out a frustrated sigh of his own that’s, surprisingly, not just put on as part of his act. “I already told you I feel more comfortable sleeping here.”

Because of the sheets.” Izuku says flatly.

Katsuki rolls his eyes and groans. “It’s not because of the sheets , stupid Deku. I like sleeping with you .”

Izuku looks...astounded at that. And somehow even more uncertain.

Katsuki gives a one-shouldered shrug. “It’s comfortable. I like how you hold me. You make me feel... safe .”

It’s a load of sappy nonsense that isn’t totally (or even any bit) untrue and it’s apparently the exact right thing to say because Katsuki can visibly see Izuku breaking down at the words. He decides that if sappy is the angle he has to take for this plan to work, then Katsuki will be sappy with the best of them.

He holds out a hand towards Izuku and then holds back a shiver when Izuku hesitantly engulfs it with his bigger hand, the warmth of it seeping into Katsuki’s skin, and lets Katsuki pull him onto the bed.

Izuku’s even more hesitant about lett ing Katsuki curl around him but after a few tense moments gives in and wraps his arms around Katsuki’s smaller body to cuddle him close.

See, Deku?” Katsuki says, nuzzling against Izuku’s neck. “Isn’t this comfortable.”

...Yes.” Izuku breathes out. “Yeah, Kachan, it is.”

 

//*********************************//

 

When Izuku wakes up the next morning with his front pressed flush to Katsuki’s back, his arm wrapped around Katsuki’s chest, and his cock thrusting into the cleft of Katsuki’s clothed ass, he makes a low, almost mournful noise at what he catches his body doing.

But what he doesn’t do is stop doing it .

Izuku keeps rutting against Katsuki even after he’s awake, even after he knows what he’s doing and who he’s doing it with, his hands twitching oddly around Katsuki like he wants to grip at him but doesn’t want to risk waking him up, his breath forcibly quietened with only little whimpers and a litany of “sorry, sorry, m’sorry, Kachan” coming out.

Katsuki has to work hard not to make his awareness known, has to bite down on his lip to hold back his own noises and has to keep his body still enough that he doesn’t thrust back into Izuku’s movement s but not so still that Izuku realizes he’s awake, has to ignore his own cock hard and pulsing between his legs and begging for attention.

He wants more than anything to turn around, to let Izuku know he’s awake, to kiss his lips and take their clothes off so he can feel Izuku’s cock against his own, skin to skin, so he can see Izuku’s eyes and see whether they’re glazed over with tears after all.

He wants it so bad .

But it’s too soon for that. Katsuki knows it’s too soon.

So he waits it out, waits for Izuku to come with a low groan, waits for him to pull away from Katsuki and stumble off to the bathroom, and then as soon as Katsuki can hear the shower running, he shoves his hand down his pants and fists his cock until he comes.

It takes seconds .

When, instead of going to the kitchen or another room in the house, Izuku comes back to bed and hesitantly wraps Katsuki up in his arms again, Katsuki counts this as another win.

 

//*********************************//

 

Once the pattern is established it’s very easy to keep going, just like it was with holding Izuku’s hand or sitting in his lap or sleeping curled up next to him.

Bit by bit, Izuku gets more and more comfortable with waking up to find himself thrusting his cock against Katsuki’s seemingly sleeping body.

He stops tensing up upon waking.

He stops apologizing in Katsuki’s ear.

He stops getting up afterwards to go wash himself off.

Izuku gets used to it and as it becomes just another part of their routine, his guilt and reluctance start to slide away with time.

When it gets to the point that Katsuki doesn’t even have to get Izuku hard himself and he just automatically starts to rut up against Katsuki on his own at the same time every morning because his body has been trained into it like a well-oiled machine

when Izuku awakens and begins to gladly grope at Katsuki’s body as he moans, his hands running up Katsuki’s chest and down his hips, palming at Katsuki’s cock through his shorts as he thrusts his own cock against the curve of Katsuki’s ass, gasping out “ fuck , fuck, Kachan” as he does

when Izuku can do use Katsuki’s body and come from it and then stay wrapped around Katsuki afterwards, holding him, waking up with him with his come still loaded inside in pants

when Izuku can smile at Katsuki in the morning and make him breakfast like nothing out of the ordinary has gone on.

When that happens, all Katsuki can think to himself is win win win .

And he’s really more than ready to collect his prize.

 

//*********************************//

 

This time when Izuku wakes and star ts to run his hands along Katsuki’s body, his cock as hard and eager as ever as it presses against his ass, Katsuki doesn’t bother trying to be quiet or still.

He lets out a very quiet and purposeful moan and ruts back against Izuku, mewling further as much at the feeling of that hard cock against him as he does at the thought of getting so much more of it soon enough.

Izuku freezes behind him immediately at his sounds and Katsuki almost wants to laugh when he imagines the surprise and horror that’s probably on his face right now.

But laughing would give the game away and Katsuki’s not about to do something stupid like that .

Not now and probably not ever.

The more Izuku thinks all of this is all his doing the easier it will be for Katsuki to work him like putty in his hands.

For now, though, Katsuki’s got a show to put on and he only hopes Izuku buys it.

Mmm.” He moans, wriggling his ass back against Izuku’s cock. “Deku?”

Izuku’s hands flex nervously against Katsuki’s body. “K-Kachan? You’re...awake?”

Yeah.” Katsuki lets out breathily, the tone not entirely fake, hiding his smirk into the sheets. “Mmm, feels good, don’t stop.”

And Izuku hesitates for such a long moment that Katsuki is worried he will stop, so Katsuki decides to take things a step further before he can make the decision to do so.

He turns his body around until his chest is pressed flush up to Izuku’s and his limbs are wrapped around Izuku like a limpet, taking the initiative to keep thrusting his own cock into Izuku’s, showing Izuku how hard he is, how hard Izuku has made him.

Please, Deku.” Katsuki mewls it right into Izuku’s ear and he can feel Izuku’s entire body shudder at it. “Please, please, I need it.”

Kachan--” Izuku starts but his voice cuts off into a squeak when Katsuki pushes a hand down between their bodies, down under the waistband of Izuku’s pants and pulls his cock out like he has a dozen times before, wrapping his small hand around it and holding it close to his own still covered cock so he feel it through the fabric as he ruts against it, moaning as Izuku’s pre-cum smears across his fingers.

Izuku, please!” Katsuki whines, squeezing at the head of Izuku’s cock the way Katsuki knows he likes when he’s asleep, and that’s all it takes for Izuku to break.

He lets out a choked out moan and starts to willing fuck into Katsuki’s fist, worming a hand down into Katsuki’s pants to grip his smaller cock and bring it out, bringing Katsuki’s cock to thrust against his own, the heads of them rubbing together, mixing their fluids, and sending little shocks of pleasure up Katsuki’s spine.

Ungh, Kachan.” Izuku groans, pressing his lips to Katsuki’s forehead over and over again, down his nose and finally to his lips where he licks at Katsuki’s mouth and Katsuki obediently opens up for him, letting Izuku’s tongue slip in and move against his tongue the same way his cock moves against Katsuki’s cock.

Izuku kisses him until Katsuki literally can’t breath e and has to pull away to gasp for air but he’s only gone for a second before Izuku dives back in and kisses him some more , still fisting both of their cocks together, thrusts getting faster and wetter, Izuku’s grip getting tighter until finally Katsuki can’t take anymore and spills himself all over Izuku’s hand and clothes.

Izuku lets go of Katsuki’s cock then and moves his hand to grip at Katsuki’s thigh, pulling it closer to Izuku’s body as Izuku fucks against Katsuki’s skin, the head of his cock ramming at Katsuki’s softened dick so hard that Katsuki is whimpering from it and can feel himself hardening again.

Fuck, fuck, fuck.” Izuku pants as his hips start stuttering, his short nails digging into Katsuki’s skin as he holds Katsuki’s body tight and still against him, thrusting once, twice, three times more before his come is spilling all over Katsuki, painting him with thick white ropes all over his mostly clothed body.

Then it’s over.

They both lay still, wrapped around each other, coated in come and sweat and gasping in the air between them.

Katsuki breaks the silence before Izuku can tense up and freak out by leaning his head up and catching Izuku’s lips in another kiss – just an easy, soft press of lips against lips before Katsuki is pulling away with a small little lick at Izuku’s mouth.

Izuku stares at him, astonished and a little awed.

Katsuki meets his eyes and smiles a very deliberately soft smile. “Thanks for taking care of me, Deku.”

It’s more effective than an “I love you” would have been and as Izuku leans forward to give Katsuki a kiss of his own, Katsuki knows one thing with certainty.

There’s literally nothing in the world he can’t get if he wants it hard enough.

Nothing.

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