Chapter Text
Swimming in the ocean without anyone looming over him felt freeing. It was like all the shitty things he had to do and endure melted away from him. There was still lingering guilt over all the people he left behind at the mercy of his father, but, Izuku reminded himself, he was allowed to be selfish, just for a bit.
Just to be safe, Izuku was using his power to monitor for the magic of those under his father’s control, he hadn’t felt anything yet but he needed constant vigilance with how close they all must still be. Just as Hitoshi and Izuku turned to start swimming in a different direction, Izuku felt his magic brush up against something familiar. He froze in place and immediately looked towards that familiarity.
Without even thinking he started swimming that way, completely ignoring Hitoshi trying to get his attention by calling his name several times. When Hitoshi grabbed his arm to stop him, the greenette wiggled free and then shot off, his body gliding through the water quickly.
After covering a good amount of distance towards the familiar magic, Izuku finally stopped and looked around frantically. He tried to scent the water around him but they were still too close to the equator and he got a blast of the smell of everyone in the area as well as some of their activities. His body felt shaky, like the adrenaline in his system was overwhelming him and it only got worse as he kept shifting around and trying to spread his magic to find that familiarity again.
“Izuku!” Hitoshi yelled at the omega when he caught up with him. “What are you doing? Where are you going?” He stared at the other for a bit and looked even more worried. “You look almost feral…”
Feral. That was a funny word. He wondered what that meant. If it was a metaphor or a real thing. Izuku zoned out again as he felt his magic brush against the familiar feeling, this time it was even closer to where he was and he took off in that direction, leaving Hitoshi to try to catch up again. He was so close. Nothing else mattered except to find the source of this feeling. He had to know. He needed this.
A body suddenly slammed against his side, knocking him off course and momentarily breaking him out of narrow focus. Izuku immediately turned to what was clearly a threat to him and hissed harshly at the person now blocking his way. He could end this altercation so easily if he wanted. He could feel his magic pulsing, begging to be used. In fact, why shouldn’t he?
Izuku brought his magic forward and lashed out with it, drawing blood from the threat in front of him and smirking to himself when they let out a pained yelp. It was all too easy.
He started to move forward again, only to catch the scent of the blood-filled water surrounding him and he had to stop again. This too was familiar but in a different way. Izuku looked down at the person he had hurt and sucked in a breath. Everything suddenly came into focus, like blinders were taken off his eyes and cotton ripped from his ears as he stared at the wounded mer.
His friends were all there. Tsuyu, Tenya, Denki, Eijirou, Ochako, and of course Hitoshi. And then… Katsuki. Kacchan… Izuku had attacked and wounded Kacchan and now the other was bleeding in front of him while everyone was freaking out and yelling at each other about what to do. Katsuki didn’t seem too hurt, just stunned but it was still shocking.
A sob broke through the arguments around him and it took Izuku a moment to realize the sound had come from him. He was so stupid, how could he let himself get carried away like that? Izuku reached forward, intending to help Kacchan, only for the blond to be suddenly yanked away from him and an angry Eijirou hissing at him in a threatening way. Yeah, he did sort of deserve that. He dropped his arm and backed up a little bit.
He backed up and ran into someone else. When he did, it was like all his nerve endings were shocked, but not with any sort of lightning power, no, this was his body’s natural response to this person. He turned around and his heart skipped. He finally found the familiar feeling. He wanted to grab them and hold on but something wasn’t right. They were giving him this blank look like he didn’t matter anymore. “Shouto?” Izuku whispered desperately.
“Izuku…” The red and white merman responded. Shouto’s face was blank and there was nothing in his tone that revealed his emotions. “You shouldn’t be here.”
Izuku felt cold and a lump formed in his throat. “I- What?”
“You’re not real so you shouldn’t be here.” Shouto explained.
Now Izuku was just confused. “What?” He repeated.
“Here we go again.” Katsuki got up from the ground. He was hurt but apparently not too much to stop his sass. He gave Izuku a glare that silently gave he message that they would talk later before turning to address Shouto. “He’s real IcyHot. You found him. You’re not imagining anything.”
Shouto blinked a couple of times and tilted his head. Now that Izuku was focusing on him, he could see that Shouto looked tired. He had dark circles under his eyes and his two tones eyes seemed to have this far-away look in them. The most worrying, was that Shouto was really skinny to the point where his ribs were sticking out a bit. The greenette had thought that everything would be fine once he got away and made it back to Shouto. But now, he could see things weren’t fine, and that caused him to let out a soft distressed sound.
That sound made Shouto scrunch his face up as he was the one confused now. He moved closer to the other and took in the other’s scent. The bi-colored merman hummed at the scent and reached out to gently cup Izuku’s face in his hands. “Oh.”
“Oh?” Izuku repeated back. His heart was beating quickly at their closeness and he allowed himself to rest his head against one of Shouto’s hands.
“You are real.” The alpha said it like he still couldn’t believe it.
Izuku couldn’t help it anymore and he leaned forward to press his lips against Shouto’s, letting out a pleased sound when the alpha kissed him back. He didn’t even care that the others were watching as he pressed his body flush with Shouto, shivering pleasantly at the warm and cold skin that was giving him butterflies in his stomach.
Someone in their friend group said something that Izuku didn’t process because at the same time, Shouto wrapped his arms around the omega and let his scent envelope him. He really wanted to be alone with Shouto, to find a little alcove where nobody could disturb them.
As if sensing his thoughts, Shouto started pulling Izuku away from the group, clearly having a destination in mind as he started swimming, still with Izuku in his arms. Nobody seemed to follow them which suited Izuku just fine. Although maybe if he focused, he could hear their friends yelling at them but he only had his senses set to Shouto now.
Izuku’s body got warmer as they kept swimming and, distantly, the greenette remembered it was likely that he was going into heat with his desired mate with him. Although happening a bit soon from their reunion, he wasn’t going to complain now.
Shouto eventually stopped in front of a space that was enclosed by rocks, coral, and seaweed. It was perfect for hiding them away but it lacked the personal touch that Izuku had the last time they were together for his heat. He felt a sensation like lava in his veins and he couldn’t care anymore while he gripped tightly onto Shouto and leaned up to kiss him again.
Shouto practically dragged them into their space, still kissing him, he pulled Izuku down into the sand where his hands started to wander and he rubbed across Izuku’s skin and scales. Izuku knew the other wasn’t using his powers but everywhere he touched, it felt like heat sissling across his skin. It was such a wonderful feeling that only made the greenette want Shouto more. He let out a happy mewl and Shouto responded with his own purr of want.
Oh, that purr did wonderful things to Izuku. He pressed his body closer to the alpha and grinded against him, relishing the fact that he could see Shouto’s body responding. The alpha’s cock had come out of the slit on his tail and was now standing erect and ready to please Izuku and help with the ache the omega could feel coming from his own slit.
Shouto seemed to know exactly what Izuku needed because he very quickly rubbed his fingers over Izuku’s slit and slid two fingers into the hole. Slick easily covered the digits and the greenette let out a moan as his mate began to thrust his fingers in and out of him, sending sparks of pleasure up his spine. “F-Fuck, Sho-“ He shifted against the fingers, impaling them deeper in himself.
“Already taking my fingers so well and your heat has barely even started.” Shouto rubbed against his walls and finally pressed against a spot that made Izuku see stars.
“Right there! Right there! Don’t stop!” Izuku begged.
Shouto was happy to oblige. He slid a third finger in and thrusted them against that spot over and over, making Izuku moan out and keep begging for more. Shouto leaned forward and kissed Izuku while his fingers worked, swallowing up the sounds of the moans while he pushed his tongue into the omega’s mouth.
Feeling Shouto’s tongue rub against his own, the greenette moaned again and sucked softly on the muscle, earning himself a soft moan from Shouto. That sound pushed him over the edge and Izuku suddenly climaxed, his muscles tightening around his mate’s fingers and Shouto kept thrusting them gently as Izuku road out his orgasm.
Pulling away, Shouto cupped Izuku’s face again with just one hand and kissed the tip of his nose. He gently pulled his fingers from the omegas hole and stroked his cock lazily.
Izuku’s head clouded more with the scent of his mate’s desire and the temporary relief from heat disappeared, leaving him flushed and wanting more. He had cum so quickly from just his fingers, he wanted to cum and feel Shouto cum with him over and over, and only then would he feel sated.
Shouto must have seen the want on his face because he quickly shifted and began to run the tip of his cock over the folds of the omega’s slit, pushing in just the head and waiting for a nod from Izuku before thrusting in all the way to the hilt.
Izuku let out a choked moan and held on tightly to Shouto, his nails digging into the skin of the others back. He felt so good. So full. He tilted his head back, exposing where his original claiming bite had been before his father interfered. He wanted it. He wanted Shouto to claim him again. He had been thinking about him all year and he felt so happy to have him back.
Shouto kissed and licked the spot on Izuku’s neck as he began to thrust quickly, soon switching to nipping and sucking, leaving hickeys across the exposed skin.
Izuku loved the attention. He wrapped his tail around Shouto’s pulling them closer and making Shouto thrust deeper into him. If he had his toes they would definitely be curling in pleasure. He didn’t want it to stop. He wanted more. He wanted. His muscled grew taunt and he let out a high pitched keen as he came again, tightening around Shouto’s cock.
Just as Izuku was coming down from his orgasm, Shouto let out a demanding growl and slammed forward, his cock catching inside Izuku and he was spilling his hot seed inside the omega. Without waiting any longer, the alpha leaned forward and bit down on Izuku’s neck, claiming him again.
Izuku let out a pleased sound and licked a stripe up Shouto’s neck before going to bite down and leave a new claiming mark as well. He got a fuzzy warm feeling in his chest and he smiled up at the alpha as he laid back. The heat in his veins had been momentarily sated and now he just felt happy. He did feel a bit worried that they rushed into this without talking after being apart from each other for so long, but that quickly became a fleeting thought when Shouto kissed him again.
Shouto eventually pulled out of Izuku and then cuddled him, wrapping his arms securely around him, probably partly because of a subconscious fear of losing his mate again. None of that mattered for the moment as they both drifted into sleep.
They must have napped for a couple hours when Izuku woke up and felt flushed and horny. He wiggled against Shouto and let out a frustrated sound when he got no immediate reaction. “Sho-“ He whimpered softly. “Shouto wake up.” He grinded against his mate a bit and that did get somewhat of a reaction. Shouto’s cock was sliding out of his slit slowly and was soon fully erect in front of the omega. Not knowing what else to do, but feeling his mouth watering at the sight, he got an idea.
Izuku leaned forward and licked up and down the shaft, lapping at the head before taking it into his mouth and sucking softly. This motion finally earned him a pleased groan from Shouto and the alpha opened his eyes and focused his lust-dilated pupils onto Izuku’s face. The alpha let out a pleased sound and reached forward to run his fingers through Izuku’s hair, encouraging him to keep going.
The greenette smiled around the length and kept going, just doing whatever felt right. He took more in and stopped when it hit his gag reflex and then pulled back a bit. He soon got a rhythm going and bobbed his head up and down, feeling rather proud when Shouto moaned out and gripped his green locks tightly.
The omega only had that grip as warning before the alpha thrusted into his mouth. Izuku immediately gagged on it and whined out in discomfort.
Shouto pulled out a bit and gently caressed Izuku’s hair in apology.
Relaxing again, Izuku swallowed around the length and starting bobbing his head quickly, pulling away every once in a while, to swirl his tongue around the tip before allowing it to plunge back in. He soon got more confident and took it in to the hilt, gagging a bit, but still going for it.
Glancing up, Izuku hummed at the lustful but loving look his alpha was giving him. Shouto moaned out at the hum It made his heart flutter to see he was the one causing that reaction. Izuku lapped his tongue on the underside of the cock and continued to bob his head quickly, spurred on by making his partner enjoy himself.
It happened very quickly after that. Shouto let out a grunt and his cock pulsed and then shot hot, thick, and salty liquid down Izuku’s throat.
Izuku swallowed, making a slight face at the salty taste. Cum was definitely better filling him elsewhere and not sliding across his tongue but seeing Shouto come undone from it made the whole thing worth it. When Shouto’s cock had started to go soft, he pulled away and swallowed the last few drops of lingering saltiness and licked his lips afterward.
Shouto smiled at him and pulled him up and wrapped his arms around the greenette so they could kiss, completely ignoring the taste of himself lingering in Izuku’s mouth.
“Let me make you feel good now.” The alpha said as soon as their lips parted again.
Izuku nodded and sat back, watching Shouto shift and get into position over him. Instead of plunging into him, his alpha bent down and Izuku made a confused face before moaning out when a tongue wiggled into him.
Shouto made a pleased growl at the sound and kept going, pressing inside of Izuku, and quickly finding a spot that sent sparks of pleasure to his omega. It was an addicting taste as well, the pure essence of Izuku in the form of slick. He continued to please the other until Izuku came with a cry, flooding Shouto’s senses with more slick. It was beautiful and Shouto felt better than he had in a long time.
Shouto pulled away as Izuku came down from his high and he cuddled the omega, sighing softly in relief to have Izuku in his arms again.
Izuku cuddled back but it seemed as his heat relaxed for a moment, the omega’s thoughts drifted.
“Is something on your mind?” Shouto asked, causing Izuku to startle from the interruption to his thoughts.
“I guess. Were you okay? What have you and the others been doing? How was my mom-“ He stopped talking again and his eyes widened suddenly. “Oh no. My mom! Shouto, he’s probably going to go after her and use her as bait to get me trapped again.” He said quickly. “He’s probably tracking her like he was me!”
“We can’t do anything while you’re still experiencing heat.” Shouto said softly, trying to use his scent in a comforting way to ease Izuku’s agitation. “She moved further inland from your house so your father won’t be able to get to her as easily.” He added on.
“He’s crazy Sho. He had this entire underground cave full of people he’s torturing and stealing their powers from. He wanted me to join him and it was awful. He can’t get my mom or any of us!”
Shouto nodded and nuzzled Izuku’s neck gently. “He won’t. We’ll get your mom and train to beat him and save everyone.” He promised.
Izuku let out a breath and tried to relax. He could already feel heat creeping back up on him but his anxiety was also making his heart beat faster and his throat felt constricted. At least his alpha was there and his scent was soothing him a bit to take the edge off. They would win. That’s the promise Izuku made to himself. They had to win because the alternative to too horrible to even linger on more than he already had.