"I've got an idea about something that could help you with training" Kirishimas voice hit his ears while Katsuki was contendly enjoing the heat Kirishimas embrace offered. After the trainig today his muscles felt raw and sore. Nothing new but way better to cope with while dozing off. So he followed his boyfriend to his room and let himself faceplant in his bed. Even through they were living in the university dorms, Kirishimas bed was always more comfortable. As horrendeous as his room was.

Back when he drifted to sleep, Kirishima was working on the homework he didn't do over the weekend. When Katsuki woke angain, Kirishima was all around him in comfortable silence, stroking his thigh while watching something on his phone. Katsuki enjoyed it for a while before moving and making Kirishima speak again.

"And?" he asked slightly impacient when Kirishima choose not to elaborate. As if he would have said it, if he wouldn't have know that Katsuki wanted to know what this was about.

"I'll show you, if you come find me in the bathrooms near the changing rooms before training tomorrow. I promise, if you can train with what im gonna give you, you will be incredibly without it" Kirishima told him excitedly while Katsuki frowned. Frowned more than usually that is, it became natural for him long before to always look angry.

"It's not some kind of drug, is it?" he asked slightly cautious, glaring at his sunshine of a boyfriend.

"Nope, its absolutely legal and harmless" Kirishima promised him, his grin audible in his cheerful voice. Katsuki hummed noncommittal before slowly heaving himself upright to get some time to freshen up before dinner.

--

"Oi, shitty hair? You there?" Katsuki asked into the bathroom, right as he entered. As if the first thing falling to his eyes wouldn't be the gorgeous man that was his boyfriend. Kirishima was leaning againts the sinks and grinned at Katsuki as he stepped in. Slowly Katsuki stepped closer, his hands shoved deep inside the pockets of his P.E. uniform.

"So, what is it?" he asked after Kirishima greeted with him a peck on the lips.

"Just be patient for once, will you?" Kirishima asked him with a fond smile on his lips. "I'm trying to help you out here."

"I don't need help, dumbass" Katsuki exclaimed and turned around to leave. He for sure wasn't here to waste his time. Before he could take more than half a step toward the door, Kirishimas arms stopped him. His boyfriend put his arms around his chest, hugging him from behind before manhandling him back towards the sinks. Katsuki didn't resist. Now he stood in front of the mirror, Kirishimas bulging arms slung around his chest and slowly moving towards his waist. He liked seeing Kisihima when he was behind him, his big hands moving over his body. Katsuki had to try really hard not to shudder with an anticipation he couldn't quite place.

„I know" Kirishima chuckled and pecked him on the cheek. „You never do and I love that about you. But I promise, it will be good anyways. You'll be the best in no time" Kirishima purred into his ear. Katsuki could see the redness rise in his cheeks while his hair fluttered with Kirishimas breath.

Still he managed a cocky grin towards Kirishima. „I am the best already. As if stupid Deku or Icy-hot would be able to best me" he told Kirishima who fondly smiled at him. Katsuki felt weirdly warm and giddy.

„So you don't wanna hear my idea?" Kirishima asked, slowly stroking up into his shirt and over his sides.

"Let's get it out already. You're wasting my time" Katsuki complained and fought to keep his scowl while arousal rose in him. They were so close and the picture of them in the mirror was mesmerising. Kirishimas hands were all over his waist and back. Then Kirishima slowly started to guide his upper body forward and Katsuki realised to late to resist. Instead he reached out with his arms to stop himself on the sinks. Kirishima didn't stop pushing until he was holding himself with only his forearms draped weirdly around the sink. His brain was already mushy while his gaze was glued to Kirishima. He looked so good, rising up behind his bend over form, his red eyes sparkling and concentrated merely on Katsuki alone. As if he would be the only thing that mattered. Any resilience against Kirishima melted away as he asked himself, if Kirishima always looked at him like that.

"Good boy" Kirishima praised him while Katsuki embarrassingly admitted to himself, that he was helplessly turned on. In the one moment his concentration wavered because Kirishima reached for something inside his pocket, his hip pushed back against his boyfriend and Katsuki escaped a whimper when he could feel, how hard Kirishima was for him. The redhead didn't act on it though, he only spread his big, warm hand over Katsukis back und gave him a few gentle strokes.

"We have time for that later, we've got training in a bit" Kirishima told him, his voice husky and laced with arousal. His eyes seemed to be a lot darker than they were before.

"Then what the fuck are we doing?" Katsuki asked, when Kirishimas hand on his pants startled him out of his mesmerised stupor. "You just trying to get me riled up doesn't help with fucking hero training in the least" he told Kirishima, his voice shaky and desperate.

just grinned at him and shoved his pants down until his ass was exposed. Katsuki throbbed while watching his gorgeous boyfirends face. Until there was something cold pushing against his entrance and Katsuki flinched away. Only to bump against the sinks in front of him. Kirishima pushed on relentlessly.

The thing he was pushing into Katsuki was slick with lube and rounded comfortably with a smooth surface. It rested perfecly between his walls and just short of the wonderful point that would let him see stars. It was getting thinner at the end though and he felt a round little piece resting between his cheeks.

"Did you just fucking insert a fucking butt plug?" he asked outraged, his face as red as Kirishimas hair. This wonderful creature he should be mad with had the audacity to just nod, seemingly proud of himself. Katsuki should blast him to the moon, at least.

"Yes?" he answered and smugly looked at Katsuki through the mirror. Katsuki gave him his best scowl while trying to reach back and take this thing out. As good as it felt, he definitely couldn't train with it and they didn't have much time left.

Kirishima caught his hands before he reached beyond his chest.

"It will help you. It may be hard at first, but if you are able to concentrate and work precisely with it, then you are basically able to do it without thinking - more space to think about a situation you have to solve" Kirishima explained and hat the audacity to pull his pants back up without checking if Katsuki was fine with it. Katsuki wouldn't have admitted it, but Kirishimas explanaition didn't sound to stupid when thinking about it for a moment. After Katsuki made up his mind to try it and Kirishima made sure he was dressed appropriately, he let him get up again. Katsuki winced, as the plug moved inside him when he stood upright again.

"Lets go, we are really late" Kirishima hat the audacity to hurry him. Scowling Katsuki followed him just for his legs to nearly give out beneath him as he took his first step. Training would be a nightmare. And like any other nightmare, Katsuki would push and claw through it relentlessly.

—

Katsuki scraped together the remaining bits of his concentration to time the explosion holding him in the air just right so that he could grip Kirishima before his feet touched the ground. His legs bucked while he was holding onto Kirishimas hardened shoulders, the only thing keeping him upwards.

Luckily he was able to spend the majority of training in the air but his hands were hurting and dry after firing explosion after explosion. Still better than walking - more like limping right now. He really didn't know how he was supposed to get back to the dorms like that - he would make it anyways. Every step he took towards the changing rooms was making him see white haze and even Dunce Face seemed to notice.

Annoyed he tuned his hearing aids higher, now that he wasn't exploding stuff anymore - at least not that often - he needed to hear people speaking at normal volume again.

"Oi, Kacchan, you good? You were unusually focused today, nearly no shouting" Pikatchu had the audacity to stroll besides him. Katsuki aimed a explosion at him in good measure. Sadly not enough to make him shut the fuck up. Next time he would totally put enough force behind the blast to really hurt that dumbass.

"Go annoy someone else with that nonsense, dipshit" he growled, glaring at Kirishima who was really at fault for his dilemma.

"Imma shower back at the dorms" he grumbled when he finally reached the changing rooms and began grabbing his stuff. No way in hell he would undress with that thing sticking inside of him.

"Me too" Kirishima chimed in, cheerful as ever. His grin was unusually devilish though. It seemed Katsuki was the only one who realised that though.

"Sure, well leave you too it, have fun. Cheer him up or something" Tape Boy had the audacity to smile brightly at them while Mineta turned away with a disgusted scowl. But Katsuki was definitely not dependent on the approval of a disgusting little pervert.

"Shut the hell up, Soy sauce" he shouted and stomped away from the changing rooms, Kirishima following silently after closing the door.

„I hate you" Katsuki muttered as Kirishima fell in step besides him.

„You don't" sounded Kirishimas cheerful voice while he gently took Katsukis hand and stroked over his knuckles. Katsuki loved how warm Kirishimas hands were all the time.

„I really don't." He admitted while still sending a scowl in Kirishimas direction. Just because he liked him, didn't mean he needed to see that. „But for real, you did this as much for you as you did for me."

„You're really giving me the benefit of the doubt here - I searched for weeks to find a reason that would get you to wear it" Kirishima told him and had the audacity to smile at him as if he wanted to outshine the sun.

„Asshole" Katsuki muttered and groaned when stepping up the stairs to their dorm building. He barely managed to walk normally and this made the plug move differently again. His whole body was shaking by now. Still not a reason to give up.

„You still love me" Kirishima grinned while watching him struggle with that lovestruck look in his face. Katsuki at least knew what he needed to do, to get Kirishimas attention.

„Right, I do. And I really want to get that thing out of me" he told Kirishima who was at least nice enough to open the door for him. As fast and with as little movement as possible Katsuki kicked of his shoes and Kirishima put them in the right shelve.

„Good thing nobody will disturb us in the showers after our leave" he told Katsuki and laid his slippers out for him.

„Then let's go, you've promised" Katsuki grinned while crossing the communal area towards the boys shower rooms.

„Sure thing" Kirishima told him and hurried to trail after him.

In the shower rooms Katsuki shoved his whole bag into one of the shelves an grabbed a clean towel. Before he could start to undress though, Kirishimas hands were on him.

„You really did great today, you know?" he started to sweettalk. Katsuki would never tell him how much he loved to get his praise. Kirishima knew anyways.

„Yeah, i know. Aizawa didn't even seem to notice any slacking off" he bragged and leaned back into Kirishimas warm embrace while the redhead unzipped Katsukis top.

„You were brilliant" Kirishima told him and put his shirt into the laundry basket. Then he palmed Katsukis dick and reminded him how painfully hard he was since literal hours.

„Come on, hurry the fuck up" he groaned, pressing back into Kirishimas form and noticing that he definitely wasn't the only one barely holding on.

„Relax, sweetheart. We've got all the time in the world" Kirishima still tried to make him wait. Angrily Katsuki pulled out the knot of the strings keeping his trousers up.

„Doesn't mean we have to take it, dumb hair" Katsuki told him and scowled when Kirishima gripped his hands and brought them in front of his chest. With one hand Kirishima held his hands there and started teasing him trough his trousers with the other one. Frustrated Katsuki pushed his ass back into Kirishimas groin and enjoyed the moan he pulled from him. He just forgot to calculate it pushing the plug deeper into his hole. It felt so good, finally hitting his prostate.

„Come on, you enjoy having my undulated attention on you. That's probably doing more for you than the plug" Kirishima murmured near his neck before starting to kiss and lick and bite all over it. Katsuki just wanted to melt into him and have Kirishima fuck him into next week.

„I always have your attention, I don't have to suffer through this for you to watch me" Katsuki told Kirishima when he had enough breath to spare between the hot kisses his partner trailed over his neck and shoulders and his hand massaging him trough his pants.

„That's true, I can barely look away from you. Do you even know, how beautiful you are?" Kirishima finally started to pull his pants down and Katsuki moaned loudly as his cock finally sprang free.

„You are perfect and I am going to spend as long as you will let me spoiling you." Kirishima finally gripped his dick and started to stroke it a few times lazily. Katsuki was sure it would be aggressively red if he would open his eyes and look at it. He was so damn close.

„Look how pretty and hard you are for me, I love how your body is responding to me. Now be good and step out of your pants for me?" Kirishima asked and sadly pulled his hands away from Katsukis body- right when his orgasm was finally building. His knees nearly gave out again, as soon as his legs had to support his full weight again.

It took a great deal of effort to step out of his pants and getting them off the floor when Kirishima edged him like that. But Kirishimas groan was definitely worth the shakiness when he bent down to pick up his clothes.

As soon as he had everything stored away in the shelve, he was back at a moderate level of hornyness. His brain was fuzzy and his thoughts swam lightly in the wonderful spot between wanting to cum harder than ever with Kisishimas dick deep inside him and staying in this haze forever.

„You really are perfekt" Kirishima praised Katsuki when he started to unzip Kirishimas shirt and had the audacity to sound both surprised and completely enamoured.

„But I still have to show you something" Kirishima announced and grabbed his phone. Katsuki growled impatient, it was time to rip those clothes off of his gorgeous boyfriend.

„If this is some stupid meme I will blast y - ahhh" Katsuki started to complain before pleasure shot up his spine. This time his legs really gave out and when his vision returned to him, he was kneeling on the tiles in front of Kirishima while the now vibrating plug send waves of pleasure through his body. Just that it still didn't hit the right spot. If Kirishima wouldn't have gripped his shoulder to hold him upwards, he would probably lie on the floor and push that thing in as far as possible. He was that desperate now.

Then Kirishima turned it off and started to streak gently through his hair.

„I really love you Katsuki, so much" he told him and lightly tipped against his chin to make him look up. „You don't even know, how much I want you in every way possible. I still can't wrap my head around how I got you to date me. You make me incredibly happy and I love every single bit of grumpy attitude you have" Kirishima told him as Katsuki came down from another orgasm he missed just by the tiniest second. Katsuki hated how good Kirishima knew his body and how good he talked him through this.

„Would you be a good boy for me now and get me wet enough not to hurt you?" Kirishima asked then and opened his own pants for Katsuki who gave a curt nod.

A little too eager he took Kirishimas dick and stroke it a few times. Then he opened his mouth, licked it and took it in. Even if he would never admit it, he actually enjoyed it when Kirishima got some satisfaction from his body. So he did his best, bobbing his head up and down and getting Kirishima as wet as possible. Kirshima had to stop him, as soon as the redhead got too close and gently pulled his hair to make him quit.

„You did so good, Love. Now, can you get up on your own?" Kirishima asked, still stroking his hair. Katsuki had to push himself upwards with a few small explosions to find back on his feet. His knee hurt a bit from kneeling on the tiles but he didn't really care. After being brought to the edge of an orgasm two times he really needed a release. And Kirishima didn't have any more reasons to withhold it from him.

„Of course I can, now hurry up, idiot!" he snarled and sadly sounded barely half as impressing as he wished. But that was okay, Kirishima had seen him at his worst and this was far from it. Actually, he felt fucking great.

„I'm so proud of you, Sweatheart, you did so well" Kirishima didn't even acknowledge his grumpiness and just gently grabbed his waiting. At least he was finally turning him around and pulled Katsuki into his warm body. Kirishimas dick found his cleft without any effort.

„You are so pretty like that, I can't wait to finally see you cum" Kirishima finally gripped the plug and after shoving it in a bit further and making Katsuki see stars, he actually pulled it out slowly. Katsuki groaned loudly while hoping their classmates were still back at the training field.

But even if not, it was hard to care with Kirishimas hard and warm body behind him and a bulky arm around his chest. It felt great to be held like this and then finally Kirishima lined himself up and started to push in, still whispering praises into Katsukis ear.

Katsuki moaned while Kirishima inserted his head and spread him way further than the plug. Before, the little toy felt bigger than it actually could have been. Kirishimas got way more girth, stretching him just right between hurtful and comfortable. It felt great after waiting and wanting for an entire afternoon.

It still took an eternity until Kirishima bottomed out, his hips as close to Katsuki as they could get. Without Kirishima holding him upright with his arms and cock, he wouldn't be able to stand at all.

„Are you alright, love?" Kirishima asked after giving him a few moments to adjust. Katsuki loved, how good Kirishima took care of him. If he was with Kirishima he didn't have to perform or do especially good, he just went with whatever Kirishima wanted. Right now, he really wanted Kirishima to move though.

„Of course I am" he answered, hearing how rough and desperate his voice sounded. But that too, was Kirishimas fault. Not only did he drive Katsuki out of his mind, he also gave him the security to be vulnerable around him. Fucker.

„Then I can move?" Kirishima asked, sounding strained as if he had to hold himself back. If Katsuki didn't need this so bad, he may have made Kirishima wait a bit more. Instead he gave a curt nod and pressed himself even further into Kirishima because he knew, that a nod wouldn't be enough for Kirishima to do anything.

But this time, Kirishima did get the memo and started to pull out exasperatingly slow. When he pushed in again, he hit Katsukis prostate and made his vision go white. Gasping he grasped the shelves in front of him, holding on for dear life while feeling the best he ever did.

With how well Kirishima knew his body so, he really wouldn't be able to last long. But Kirihimas movements grew faster and messier with every thrust. He was at least as desperate as Katsuki for this and that made it even better. There wasn't anything as perfect as feeling Kirishima buried deep inside him, slowly loosing control.

„So beautiful, taking it so well" Kirishima whispered sweet nothings into his ear, sounding breathless and absolutely enamoured. Then he startet kissing his neck again, even burying those sharp damn teeth into Katsukis skin. He could feel every shallow breath Kirishima took and it was great.

Then Kirishimas hand was around his length and stroking. Katsukis eyes turned inside, the pleasure too much to contain.

„'ma cum" he warned Kirishima who took it as an invitation to get even faster, moving his hand in sync with his thrusts and breathing heavily into his neck.

„Then cum, love" Kirishima still sounded so goddamn soft and loving and fucking hot and Katsuki came. And so did Kirishima, just a moment later.

After a short rinsing off they sat in the bath, Katsuki draped over Kirishimas lap and still feeling hazy. He always got a bit sleepy after an orgasm but with training beforehand he felt like dozing off even more.

"You really did great, you know?" Kirishima broke the peace, taking his hand and gently massaging it as if he knew exactly how much he strained them and how they hurt.

"Yeah, im always really great" Katsuki managed a grin before sinking even deeper in the embrace Kirishimas arms offered.

"True. You appreciate hearing it anyways" Kirshima pressed a kiss at his temples and made his fingers move in calming circles all over his hands.

„Just a little" Katsuki admitted in his post-orgasm-high. He had to give Kirishima at least some reasons to stay with him - friendliness was none of them.

„You're in charge of feeding me later, idiot" he told Kirishima and closed his eyes. "Dont let me drown."

"Never" Kirishima promised him with a dedication that made Katsukis throat go dry. " I love you, Kats."

"Love you too, idiot. Now let me sleep" Katsuki told him and leaned his head comfortably against Kirishimas buff assed chest. Fucker did make a good pillow.