Adrenalin [NSFW]

Izuku shifted uncomfortably in his sweaty jumpsuit, listening to sirens drive away down the street. The school was abuzz with excitement, every teacher out attempting to corral their students back into their classrooms, but it seemed to be a futile effort.

It wasn't the first attack they'd had on school grounds, not by a long shot, but they never stopped being weird and unusual, never stopped sending the entire student body into a frenzy. First-years screamed and cried, and later dropped out of school; second-years stepped up to help fight, hardened over their long months of what felt like war; and tired third-years downed mugs of coffee and headed out to put the idiot villains in their place once more.

Izuku was no exception, with the dark circles under his eyes and his hair even more of a mess than usual, but he'd played a major part in this most recent battle, and it felt like he'd been smiling and nodding and thanking people for their praise for hours. The police were gone, the villains were gone, he wished they'd all let him go too.

He had a routine to follow, after all.

When Aizawa finally dismissed them, letting them head back to the dorms to scrub blood out of their hair rather than return to the classroom, Izuku went straight for the elevator. He hadn't even closed the door when Katsuki showed up, locking it behind him without a word and kicking off his scuffed boots.

“Hey,” Izuku said softly, his hand already reaching for Katsuki's fly. “Good work today.”

Katsuki snorted rather than reply, yanking Izuku's zip down. He peeled the sleeves down off of scarred arms, ignoring the smell of trapped sweat, and Izuku finally cracked a smile as he shoved the damp fabric down to his ankles.

“You did alright,” he conceded, spreading his hand flat across Izuku's chest and giving him a little shove. “Saw you squirming though, can't even wait ten minutes?”

“Don't tease me, Kacchan,” Izuku pouted, letting Katsuki push him onto the bed. “Are we gonna fuck or not?”

“Obviously, nerd.”

They'd only been dating for about a month when the routine had begun. They’d fooled around before, of course, but something about the rush of adrenalin after winning a big fight together had sent them back to the dorms in a frenzy of groping hands and panting breaths. Izuku was pretty sure the entire dorm had heard them going at it, but they had been tactful enough to not say a word – though Kaminari did try to get a high-five from Katsuki on their way through to the showers afterward, which Katsuki vehemently refused. It wasn’t like they were the only ones getting it on in their dorm building, and everyoneknew they were together, so Izuku supposed it was pretty natural to just let it happen.

This time, though, as Izuku dragged Katsuki down to the bed with him, he caught a wince pass over Katsuki’s face. He stopped immediately, halting Katsuki in his tracks, and Katsuki whined quietly when Izuku started to sit back up.

“Kacchan, did you hurt yourself?” he asked, eyebrows knitting together as he searched for cuts and bruises. “Where does it hurt?”

“I’m fine.”

“Kacchan.”

Katsuki rolled his eyes, but gestured with his arm vaguely, eyes twitching a little as he forced his face to remain steady. Izuku caught the gesture immediately, though, and he was off the bed before Katsuki could say a word, grabbing a couple of pairs of sweatpants from his bottom drawer.

“Don’t fucking do this, nerd, it’s just a bruise or some shit, get back here.”

“Kacchan, you don’t wince like that over a bruise. Come on, we’re going to Recovery Girl.”

“I hear blowjobs have great healing properties.”

“Har har,” Izuku said flatly, holding out a pair of pants. “Come on, get dressed.”

With a sigh, Katsuki stepped into them, complaining the whole time when Izuku insisted on tying the strings for him and gently coaxing a hoodie over his sore arm. He even dug out an old first aid kit and made up a sling, frowning stubbornly when Katsuki tried to object. As much as Katsuki was always determined to have his way, he knew it was a losing battle when Izuku got like that. Izuku knew how to pick his battles, but the ones he picked, he always won.

The line to Recovery Girl’s office was a mile long, stretching right down the corridor, and Izuku groaned when he saw it. There were people dripping blood into towels where their bandages couldn’t contain it, people leaning on their friends where they couldn’t walk unsupported, even a few people looking giddy and tired who he suspected had to be concussed.

“Told you it wasn’t a big deal,” Katsuki smirked knowingly. “Let’s go, we can come back later.”

“Let’s go to the hospital,” Izuku said firmly, grabbing the good hand and dragging Katsuki along. “It’s only five minutes away, I’ve walked there before!”

“I don’t need to go to the hospital!”

“For me, Kacchan?” Izuku jutted his lower lip, pouting. “Humour me, okay? I’m worried about you!”

“Ugh. Stop being cute,” Katsuki growled, cheeks burning. “Fine, what the fuck ever, nerd. You owe me.”

“Thank you, Kacchan! I promise I’ll make up for it when we get back!”

“You better.”

The hospital was much emptier than their school nurse’s office, though Izuku spotted a few familiar faces in the waiting room when they walked in, others who were able to walk far enough for treatment elsewhere, or who suspected they needed more than a kiss to fix things up. Recovery Girl was an expert when it came to wounds, but bones tended to need a little more help to set in the right positions, and while Izuku wouldn’t dare say it out loud and incur Katsuki’s wrath, he suspected bones might be the root of their problem.

Sure enough, the nurse sent them straight through to radiology to get it checked out, and Katsuki grumbled the entire way through to the little x-ray room. Izuku left him at the door with a kiss on the cheek and a reminder to be good, and then Katsuki was alone, sighing as he sat down and rolled up the sleeve of his hoodie.

“Does it hurt a lot?” the doctor asked, as he got Katsuki in place and set up all the equipment around him.

“A little,” he admitted, glancing at the limb he was trying his best to not move. “It’s probably just a sprain or something, I used to do it a lot when I was younger.”

“Ah, arm quirk?”

“Explosive hands.”

“Wow, that must be fun.”

“Yeah,” Katsuki nodded, looking down at the good hand and balling it into a fist. “It’s cool.”

The machines whirred to life when the doctor left, and Katsuki waited with as much patience as he could muster, letting them take shots from different angles that would no doubt prove he was totally fine and could have been at home getting blown by now. A nurse took him to another room when they were done, and Izuku followed him this time, gently loosening the tight fist in favour of lacing their fingers together sweetly. It was sickening how sappy Izuku got at the drop of a hat, and Katsuki hated himself for not hating it.

“You’re being such a good boy,” Izuku murmured, leaning over to kiss the sore arm lightly. “So proud of you Kacchan, so glad you’re letting people take care of you.”

“I don’t need all this babying shit,” Katsuki grumbled, making no move to shove him off. “You’re so lame.”

“I know,” Izuku smiled, kissing his cheek this time. “The lamest.”

“You’re so lucky you’re hot.”

“The luckiest.”

“You make me sick.”

“The sickest?”

“Shut up.”

When a nurse wheeled in a cart of equipment, Izuku couldn’t help but feel a little triumphant. The doctor hung up the x-rays for Katsuki to see, pointing out multiple breaks, and Katsuki scowled when Izuku looked at him knowingly.

“We’re going to put a cast on it for a week and then you’ll need to come back to get it checked again. Your file says you’re a U.A. student?”

“Yeah,” Katsuki grumbled. “Can I still train and shit?”

“If you can make it in to see Recovery Girl, she can help speed up the healing for you. By the end of the week you should be back to normal, with her help, but you’ll still need the cast to keep everything in place while it heals. Until then, I advise against any kind of training that uses your arms.”

“Lots of Leg Days,” Izuku grinned, nudging him lightly. “Work on those thighs.”

Katsuki lifted his arm up when directed, letting the nurse get to work. She cleaned it off first and covered it in padding, then began taking long sheets from a box and soaking them in water, ready to wrap him up. Izuku smiled when she opened a drawer, showing off a range of colours, and he couldn’t help but lean in fondly to tease a little.

“Bright pink?” he suggested, ducking the half-hearted swipe that aimed at his head. “Orange would match your costume.”

“Green,” Katsuki said quietly, as if Izuku hadn’t even spoken.

“Green it is!” The nurse smiled knowingly. “I like this one, too.”

Izuku beamed at him, watching the arm get wrapped in a deep forest green, but Katsuki carefully avoided his eyes the entire time, refusing to meet his gaze. His cheeks were slightly pink, though Izuku supposed that could have been the lighting – he was sure Katsuki would make that claim later, when Izuku inevitably teased about it.

“I’m so proud of you,” Izuku grinned, reaching up to stroke his messy blond spikes – he couldn’t help but notice his hand came away dirty, they still hadn’t managed to take a shower yet. “You’re being so good.”

“Shut the hell up, nerd.”

With a list of instructions in hand for taking care of the cast, finally the pair was sent home, and Izuku linked his arm through Katsuki’s good one as they stepped out into the street. Despite the teasing undertones, he really was proud of Katsuki for how patient he’d been with the doctors – he’d never complained even once about the wait!

“You did so good,” he said again, ignoring the way Katsuki’s eyes rolled. “But we really need a bath, we’re a mess. How about I help you put a plastic bag over your arm, and we  use the communal bath together? I can help you get nice and clean, and we can relax together in the hot water.”

“I don’t need your damn help.”

“I know,” Izuku humoured him. “But I want to help, and isn’t that what boyfriends do? Help each other wash? It’s cute and couple-y, right?”

“Whatever, idiot.”

“And I’m gonna cook you dinner.”

“You can’t cook.”

“I can too! Maybe not as well as you, but I can cook!”

“I’m supervising.”

“Fine!”

The dorms were thankfully pretty quiet when they returned, most of their classmates sound asleep in their rooms, no doubt. Izuku found a trash bag in the kitchen and a roll of tape, getting Katsuki sealed up, and then they headed through to the warmth of the big communal bath. Izuku didn’t make nearly as much use of it as he’d have liked, usually ended up just throwing himself under a shower head for five minutes, but on the rare occasion he found the time for it, the bath was a godsend.

He started the massive tub filling, then began to strip himself off, pausing to help Katsuki with his hoodie when it stuck briefly on the edge of his bag. Soon they were both bare, pulling up a couple of plastic stools and a bucket, and Katsuki ran his hand slowly over a scar on Izuku’s chest.

“I always feel shitty thinking about it,” he explained quietly, when Izuku watched him linger. “I should have helped. You wouldn’t have so many if I had helped.”

“You helped with the important ones,” Izuku smiled back. “That’s why we’re both still here, right?”

“I guess so.”

He shuffled in a little closer, dumping shampoo in Katsuki’s hair and lathering it up, and Katsuki ducked his head a little to let him work. He wouldn’t say it out loud, of course, but Katsuki was well aware of the things he couldn’t do one-handed, he was glad Izuku had enough experience with injuries to just do it without making him ask for help. Not that he couldn’t ask for help, at least from his boyfriend, but it was a lot nicer when he didn’t need to.

Katsuki’s thumb brushed over a pert nipple, and Izuku froze for a moment, biting down on his lip. Katsuki shoved his head under the shower stream to rinse out his shampoo, then leaned in closer, pressing his lips softly against Izuku’s, the touch a little dry and clumsy, but somehow still perfect all the same. Izuku’s lips curled into a smile against his, one hand lacing through his hair and making him shiver, and Katsuki hummed contentedly.

“Still gotta get you clean,” Izuku whispered, smiling to himself when Katsuki’s hum turned into a grumble. “I’ll give you lots of kisses after, I promise.”

“Kisses first, soap later.”

“You’ll complain about your hair being dry.”

“It’ll cope for ten minutes.”

“Ten?” Izuku snorted. “We’re not gonna sit here naked in a communal bath and make out for ten minutes. Maybe one minute.”

“Deal.”

Izuku huffed, but Katsuki’s sharp little smirk was irresistible – he never could say no to that conceited smile. He shuffled a little closer, dragging one of Katsuki’s legs across his thighs and slotting them together perfectly. Katsuki’s lips parted, letting Izuku in, and as their tongues met Izukuran his thumb over Katsuki’s inner thigh, feeling Little Katsukispring to life against the back of his hand. He smiled, getting a little huff of annoyance in return, but when he slid his hand up the strong thigh the complaint quickly turned into a cute little whine.

He curled his fingers around the shaft, tongues still mingling lazily as he began a slow stroke, and Katsuki pressed into him harder, hips shifting as he searched for more friction. With a little smirk, Izuku brushed a thumb across the tip, letting their lips part to watch him squirm.

“Time’s up, back to cleaning.”

“You fucker.”

Despite the complaints and whines and curses and even a hint of begging, Izuku refused to give in. He hummed to himself cheerfully as he conditioned Katsuki’s hair, quickly washing his own to match, and soon they were sliding into the hot bath, Katsuki still pouting even as they cuddled up together in the water.

“You’re such an ass,” Katsuki huffed, when Izuku nuzzled into his neck happily. “Can’t believe this shit.”

“You didn’t really think I was gonna jerk you off in a communal bathroom, did you? That’s so rude to our classmates! How would you feel if you found out you were bathing in the same spot where one of your friends had sex?”

“I bet you ten bucks they’ve already done it.”

“What?! Ew!”

“So we may as well mark our territory, right?”

“No. You can wait like an hour until we’ve cleaned up and eaten!”

“Damn right I wanna be eaten.”

“Kacchan.”

Katsuki smirked, but he leaned into Izuku’s grip despite his complaints, draping his good arm around Izuku’s shoulders comfortably while the other rested along the edge of the tub. Despite his complaints, especially the ones coming from lower down, he really did enjoy the chance to cuddle and tease with his boyfriend. They didn’t get enough chances to relax together.

“Alright, I’m warm,” Katsuki grinned, nipping at Izuku’s neck. “Dinner time?”

“Fine,” Izuku sighed, relenting. “You’re so impatient.”

“And then dessert.”

“Only if you’re good,” Izuku huffed, pinching his thigh. “Naughty boys don’t get what they want.”

“Oh I can be a very naughty boy.”

“You’re shameless.”

“Damn right.”

Izuku helped him out of the bath, amused to get no complaints about the help now that he wanted something. Katsuki just leaned into him, letting Izuku dry him off gently and get him bundled back up, then watched with his cocky little smirk as Izuku did the same to himself. He eyed every curve of Izuku’s athletic body as he bent over to pull his pants on, leaned over a little to catch a glimpse of his cute butt, and when Izuku stretched up to pull a shirt over his head, he even wolf-whistled playfully, watching Izuku blush and stumble, his shirt suddenly a prison.

“What, I’m not allowed to check out my sexy boyfriend?” Katsuki teased, when Izuku’s head finally popped out, pouting. “Come on, baby, take me to bed.”

“We need food first,” Izuku reminded him, poking him in the cheek to deform his smirk. “we skipped lunch and it’s almost time for dinner.”

“I already have a snack right in front of me.”

“You’re the worst.”

He followed obediently when Izuku headed to the kitchen, leaning against the counter to watch him hunt down food, but when he reached into the freezer for some of Katsuki’s pre-prepared meals he couldn’t help but laugh. Nerd was just as eager to get upstairs as he was.

They defrosted quickly in the microwave, and Izuku took a moment to cut all of Katsuki’s into bite-sized pieces to eat one-handed. It annoyed Katsuki a little, purely for the hatred of needing help from anyone, but he had to admit it was a sweet gesture, too. He didn’t even have to say a word, Izuku just knew.

“Alright, babe, let’s go eat,” Izuku said finally, carrying two plates toward the stairs. “Be careful, don’t fall on the stairs and make it worse.”

“I’ve never fallen on the stairs in my life.”

“I know that, but now would be a really bad time to start.”

“Fine,” Katsuki snorted. “I’ll be careful, nerd.”

They made it to Katsuki’s room with no incidents, and Katsuki finally got to snuggle into his boyfriend’s side again, humming contentedly when Izuku pulled him in tight and planted a kiss on his temple. As much as he liked to deny it, he really did enjoy the cuddly part of being in a relationship. It was nice to just curl up together, all warm and comfortable, finding all the best ways to fit their bodies together like a weirdly ambiguous puzzle. He liked the way Izuku’s arm fit around him just right, when he pulled him into a hug, and the way he was the perfect height to lean his head on Izuku’s shoulder when they sat side by side, Izuku’s head tilting in turn to rest on top of his own.

“Should I spoonfeed you?” Izuku offered, when he handed over Katsuki’s plate. “I don’t mind.”

“God no.”

“Are you sure?” he scooped up a little rice, poking it at Katsuki’s lips. “Say ‘ahhhh’!”

“Fuck off.”

“You want me to leave?”

Katsuki growled quietly, and Izuku cracked a smile, pressing into him a little tighter as he picked up his own plate instead.

Usually they tended to put a video on as they snuggled, a movie from Katsuki’s collection or a TV show they’d fallen behind on, something they could entertain themselves with while they cuddled and ate or talked. This time, though, neither of them bothered to get the laptop out, they just took in each others company, basking in the relief of another fight over with only minor injury as a result.

When their plates were empty, Izuku set them both aside, using his free hand to pull Katsuki in closer and plant sloppy kisses on his cheeks and hair. Katsuki squirmed, laughing despite his complaints, and Izuku could only grin down at him, so ridiculously happy just to be sitting together and holding each other. He closed his eyes to savour it, taking a deep breath and letting out a faint sigh that made Katsuki elbow him lightly.

“Better not be falling asleep on me,” he grumbled. “Wake up, nerd.”

“Mm... Comfy. Why can’t I sleep?”

“You fuckin’ serious?”

Izuku whined when Katsuki pulled away to look at him, eyebrows knitting together despite the faint blush in his cheeks.

“You’re supposed to be sucking my dick, nerd. I’m still waiting for you to finish what you started.”

Laughter burst from Izuku’s lungs almost painfully hard, and Katsuki couldn’t help but soften a little when he saw the smile aimed at him, though he forced a pout onto his face regardless. Izuku finally nodded, reaching for his fly, and in that moment Katsuki thought it might be the best day of his life.

“Are you really going to?” he asked stupidly, eyes wide. “Hell yeah.”

“Of course! Anything for my Kacchan,” Izuku grinned, diving right in and licking along the underside of the shaft. “Gotta make you feel good since you were such a good boy today.”

“Not even gonna fuckin’ complain about that shit.”

“Good choice.”

He slid down the bed to get comfortable, lying on his stomach and wrapping his lips around Katsuki’s head, swishing his tongue over the tip and feeling precum already leaking into his mouth. Katsuki threw his head back, his fingers curling into the sheets, and Izuku gently loosened the injured one, nudging it up to rest against his stomach instead. Katsuki allowed it, for once, propping his cast against his body where it was out of the way, and his other hand crept up too, tentatively tangling in Izuku’s hair. He looked down at Izuku for any sign of protest about the movement, but Izuku just hummed quietly, sending vibrations through Katsuki’s dick and making him moan all over again.

He wrapped his hand around the base, moving his lips away for a moment to nip at sensitive thighs and watch Katsuki writhe beneath him, a smirk tugging at his lips every time a gasp came out of those pretty lips.

“Such a good boy,” he praised, trailing kisses up to his crotch again. “So proud of my Kacchan.”

“Fuuuuck,” Katsuki hissed. “Please, Deku.”

“So good, so polite.”

He licked across the tip again to keep him from arguing, watching him bite down on his lower lip to keep the noises at bay when Izuku began to sink lower. He moved slowly, Katsuki’s thighs trembling with the effort it took to not thrust up into him, but he managed to resist long enough for Izuku to reach the base and swallow hard.

The first unabashed moan came out, at that, and Izuku filled with self-satisfaction at the sound. When Katsuki managed to bypass his concerns about how he looked and sounded, giving himself over to the pleasure, it always made Izuku feel like he’d won something. He knew he was doing a damn good job when he could make Katsuki moan and whine like a little whore.

He shifted a little, wrapping one hand around his own dick to stroke himself in time with his movements, and Katsuki’s grip tightened in his hair as he got closer. With the gentlest touch, Katsuki pushed a little, just enough to make his point and encourage Izuku to move faster. And who was Izuku to resist his boyfriend’s wishes? He sped up a little, dick throbbing when he felt Katsuki’s thighs tighten around him, and with a last moan he began to swallow, letting Katsuki’s semen shoot straight down his throat without having to taste it. His hand continued moving, stroking himself desperately, and by the time he finished swallowing there was a matching little puddle on the dark sheets beneath him.

For a moment neither of them spoke, Izuku laying his head on a warm thigh while Katsuki  took a minute just to breathe, then Katsuki’s grip began to loosen, gently brushing messy curls back from Izuku’s sweaty forehead.

“Damn,” he said fondly, when Izuku’s eyes moved up to look at him. “If that’s what I get for breaking an arm, I might have to break bones more often.”

Izuku huffed quietly, a tired smile tugging at his lips, and he reached up to touch the deep green cast fondly.

“Don’t you dare.”