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Izuku couldn’t remember exactly when they wanted to start doing what they do now, but it had to have been after that one night. It had been a cold night, and after their shift spent patrolling the streets, Katsuki had gotten splashed with water. They were closest to Izuku's house, so he'd convinced Katsuki to go there to dry off. Katsuki came out in just a towel, and Izuku couldn’t help but stare. One thing led to another and soon, Katsuki was fucking Izuku into the sheets. They’d been dating for a while and pretty regularly had sex, but after that night - when Katsuki let off an accidental mini-explosion against Izuku’s skin - they’d started to ask themselves if they wanted to do something more risque.They were a very popular Hero Duo, their personalities complementing one another splendidly. Izuku's rational and calm demeanor helped to tame Katsuki's crass and irrational behavior. Alternatively, Katsuki's outgoing and straightforward nature helped to bring Izuku out of his shy and evasive shell. Everyone could see they worked well as a pair. But one thing that hadn't become well known until recently was that they were a couple... and had been dating since their first year at UA.
A few weeks later landed them at a class reunion hosted by Iida and Uraraka. This was the moment both Izuku and Katsuki had decided to let the whole class know they were dating. Katsuki was sorely regretting this decision."Wait, what, REALLY?! That long?!" Kirishima looked at the both of them incredulously as everyone else they were eating with - the entirety of their former class - also looked at the Wonder Duo in awe."How'd we miss that?!" Uraraka groaned."Well, uh, we weren't very verbal about it, because... you know… gays were still really looked down on until about third year when the activism went pretty hardcore..." Izuku looked down at his food, a little nervous about the exposure. But he and Katsuki had decided to do this together.Katsuki tightened his grip around Izuku's waist and pulled him closer. "Hey. Don't go overthinking, nerd."Uraraka frowned and looked between the two of them. Her eyes landed on Izuku as concern shone in her eyes. "Deku... he hasn't forced you into this relationship, has he?"Izuku blinked and then furrowed his brow as he tilted his head. "Of course not, Uraraka. You know, Kacchan may be abrasive, but he's not abusive. He may have-” Izuku paused, looking for the wording. “-his moments, but he's not a bad person. He's a hero.""That doesn't matter to every hero," Todoroki pointed out and Izuku frowned more. Todoroki was right. Endeavor was a pretty shit person to his family. But Katsuki wasn't like that! His face wrinkled up more in stress, causing Katsuki to lean over and press a quick kiss to Izuku's cheek."Ah. Kacchan, what was that for?""You were getting that stressed-out look on your face again. Stop holding back what you wanna say and just say it, dumbass," Katsuki gently slapped the backside of Izuku's head."Y-Yeah." Izuku inhaled and then looked over at his peers and comrades. "Whatever notion you have about Kacchan is wrong. You don't know him like I do, like I have, for YEARS. He's a lot of things, and can be volatile, but he's a good person.""Besides, HE'S the one that asked ME," Katsuki chipped in with a casual shrug before leaning forward, withdrawing his arm from around Izuku's waist, and taking a drink of his sake."Woah, for real?" Kaminari blinked and then grinned at Bakugou with a cheesy grin. "I didn't think you'd bottom, Bakugou."Katsuki glared up at Kaminari, shadow casting over his face. "You wanna die, dunce face?!"Kaminari shivered, shook his head, and immediately apologized.Izuku laughed nervously and scratched at the back of his head as he thought about it. "Honestly, I took a shot in the dark. Something Recovery Girl said to me about how Kacchan really cares about me made me wanna try.""But how did you know that Katsuki was gay?" Todoroki asked with a tilt of his head. "I mean we all just found out today that you two were dating, letting alone gay.""Actually Deku's bi, I'm the homo."Everyone cast their eyes on Katsuki, who continued to speak. "And quite fuckin' simply, I told Deku.""Why?"Katsuki about popped a blood vessel when he heard the question. "Why does it fuckin' matter, half-n-half bastard?!""Because it's interesting.""Get your own love life!! We don't have to share ours!"Izuku chuckled and placed a hand over Katsuki's, leaning into them. "C'mon, Kacchan. It's not a bad reason.""It's still none of their fuckin' business," Katsuki grumbled as he was calmed down by Izuku rubbing circles into his hand with his thumb. He’d told Izuku because the damn nerd walked in on him trying to find gay porn to wank to, but it wasn’t any business of those nosy extras. He relaxed a bit before looking at his watch and then immediately standing up. "Hey, nerd, we gotta go. Work starts in an hour.""Oh? Time flew by that fast? Well, bye, everyone!" Izuku grinned happily and waved everyone off.
"K-Kacchan- ah!" Izuku shuddered as his hands were pinned above his head and Katsuki's dick was thrust roughly inside of him. "Harder!"Work had ended and now they were here in Izuku's apartment, fucking like rabbits."You like it when I fuck you nice and rough like that, Deku?" Katsuki whispered seductively in the Izuku’s ear, causing the greenhead to shiver as those lips ghosted over the shell of his ear."F-fwah~!! Ah! Kacchan!" Izuku moaned out. "Kacchan! We just- hah, just got clean.""Yeah and it's cold out, so let's warm up." Izuku could hear the smirk in Katsuki's voice. He pressed his chest to his bed and lifted his ass in the air for more. Katsuki grabbed his hips and rammed into the smaller man's ass repeatedly, angling himself to hit any of Izuku's sweet spots. As Katsuki went to grab Izuku's ass, his palms accidentally sparked a bit, riled as he was to fuck the nerd senseless, and burned Izuku’s skin. "Shit, Deku, are you-"Katsuki was cut off by a moan and Izuku's ass firmly being thrust back into him. "Ah~! Kacchan. That felt- hnng! So good~!"Katsuki blinked a few times and repeated the action with the other ass cheek, causing the same, slightly pink mark to occur on that cheek as well. This earned him another moan from Izuku. Smirking, Katsuki roughly grabbed both sides of that round ass in hands and burned the skin. The burns were minor, barely enough to turn the tender skin of Izuku’s ass pink. However, the moans Katsuki elicited from Izuku were so beautiful they'd be burned into his memory for life."I've been treating you so gentle in bed, but you're fuckin' freak. Who knew you were a masochist, Deku~"Izuku looked back at Katsuki, coming down from his sex high just a small bit. "It's your fault, Kaccha--ah!" Katsuki cut him off with a sharp thrust to Izuku's prostate."My fault, how?""Well... you've bullied me your whole life and here I am, still willing to have sex with you and love you..." Izuku fidgeted a bit before biting back a moan with another of Katsuki's now painfully slow movements. "I think... you bullying me just turns me on..." Or rather, Izuku believed it always had, but he didn’t want to face his own masochism."Oh?" Katsuki smirked and yanked Izuku up by the hair. He let his lips ghost over the other's throat. "Does it, now?""Y-Yes... I like it when you call me names, and-and... hurt me... but... in a sexual way- ah!" Teeth sank into Izuku's throat and ripped another moan out of him. "Kacchan! Ah! Sh-Shit~ ah!"Katsuki chuckled and began to move more viciously, ramming in so hard Izuku's ass would have bruises for weeks. Izuku loved every rough thrust, every bite on his neck and shoulders, every burning slap on his ass, all of it. He wanted more.
And more is exactly what Izuku got on the day Katsuki finally moved in with him. Katsuki handed him an Amazon box with a smirk as he went to go unpack his things in their now shared room (which Izuku had to make room for by sacrificing a lot of All Might paraphernalia). Izuku tilted his head and looked to Katsuki with his eyebrows knitted together and a questioning look in his eyes."What's this, Kacchan?""Open and find out."Izuku nodded as Katsuki walked out of sight. Opening the box, he was greeted with packing peanuts. Wonderful.Deciding he'd clean them up later, Izuku dumped the entire contents of the box on the floor. He flinched when he heard a loud thud. Looking down, Izuku was greeted with something fairly large. He blinked.
One second.
It was shaped like a mushroom. And it was made of rubber.
Two seconds.
No wait, that's silicone. And it's black.
Three seconds.
That's not a mushroom.
Four seconds.
It has veins.
Five seconds.
It finally clicked. Izuku was staring at a massive black silicone dildo of funtime. His face went red not a second later."KAAAAAAAAACCHAAAAAAAAAAAAAAAAN!!!!"A moment later Katsuki was back out looking at Izuku's mortified expression. Cackling, he picked up the Dong-Fucker 3000 and wiggled it in front of the greenette's face."Kacchan! That-that's so lewd!""Yeah, and? Didn't we say we were gonna start trying this shit out? Well, I wanna see your fucked out expression as you ride this thing in front of me." Katsuki smirked as he patted Izuku's cheek with the 2-lb dildo."Wh-wh-what!? That thing's NOT gonna fit inside me, Kacchan! I'll break! I can barely fit you, and we both know damn well that thing is at least THREE Kacchan dicks wide!"Katsuki roared out a laugh as he dropped the dildo in favor of holding his stomach. "Three Kacchan dicks wide!? Is my dick now a unit of measurement?"Izuku puffed his cheeks and looked to the side, not as amused as Katsuki was. "Maybe. It's big enough to be its own unit.""I appreciate the compliment, but it's not that big. It's maybe... one and half times my girth. Twice my length. It's called 'The Black Dragon' and for good reason. If you look closely at the base of it-" Katsuki picked up the mass of silicone again and point where he wanted Izuku to look."-it has a knot. Nice and big to stuff that cute, little ass of yours."Izuku paled and gulped. "How... am I gonna go about get that thing inside me, Kacchan...?" If there was ever a time when Izuku's voice sounded pathetic and defeated, it was now."Practice makes perfect, Deku. As a Hero, you should know that."There was a slight hint of 'evil' in Katsuki's voice that made Izuku gulp loudly. "Y-Yes, Kacchan.""We won't do the other stuff until you’ve mastered riding The Black Dragon, so get to practicing."
Izuku gulped as he looked at the massive silicone destroyer-of-asses in front of him. He'd tried over the past two weeks to get that thing inside of him, but was barely able to manage the tip. How am I supposed to get the rest of this thing inside me?!Sighing, he got up and grabbed it off the floor. He had the day off, but Katsuki was at work. "Maybe... I can get it inside today, and then... Kacchan will reward me..." He wanted Katsuki to be proud of him for taking this monster pseudo-cock in like a champ.Izuku's cheeks flushed as he suction cupped the dildo to the front door of his apartment. Something about doing it in the living room so openly was a bit of a turn on for Izuku, though that particular kink didn’t rear its ugly head until he started dating Katsuki. He gulped and slowly started to back up onto the dildo. He'd already lubricated it and prepped himself for this task. Inhaling deeply, he got to the tip and barely squeezed his aching hole around it. "This is impossible... it won't go in...." Just as he started to remove himself, the front door flew open, ramming the dildo inside Izuku in one fell swoop. His vision whited as he felt the monster dildo stab his insides.He yelped as he braced himself on the nearest thing - the coat rack. Looking back to see who'd swung the door open, Izuku's eyes widened as a sunken face stared mortified back at him."A-A-All Might!?""I... see you're busy, young Midoriya... I uhm... I'll come back later..." Toshinori reached for the door, then hesitated. "Should-should I close this, or uhm-""Please, just leave."Toshinori ducked out and Izuku backed up a bit until the door closed. This time, he locked it. He wanted to get off the dildo and hide in shame... but something about being caught made his dick even harder. I guess... I like being watched... no matter who it is...Gulping, Izuku pulled forward again and then rammed back down on the dildo of death and felt his insides stir. Looking down, Izuku could see a slight inflation in his belly where the dildo was nestled in his intestines. He poked and then shuddered before rubbing it with a moan. "It's filled me up so nicely..."Izuku had already forgotten his encounter a moment ago with All Might. All he wanted to do now was fuck his brains out with the brand new toy Katsuki had gotten him. Izuku began setting a pace, moving up and down on the dildo as he rode it out on the door. A poor placement choice, but Izuku was in heaven. Thanks to All Might slamming the dildo into him, Izuku was now able to ride The Black Dragon. That meant Kacchan would reward him.
Unfortunately, because of the ramming to his insides, Izuku had to go to the hospital after taking The Black Dragon out... his ass had prolapsed and he needed it fixed properly back in place. When the doctor asked how the Hero "Deku" had gotten a prolapsed anus, Izuku avoided mentioning the word "dildo" until he absolutely had to come clean about it. He even had to get down to the details on how it was rammed so hard up his ass.Izuku swore to never go to the doctor's again after that.That night, however..."Kacchan. You know I wanna, but I already told you. The doctor said no anal sex for the next two to three weeks while my ass heals...." Izuku stated with a pout as Katsuki removed his lips from the greenette's neck. "I mean, for goodness sake, I have to use a donut cushion in order to prevent further injury to my butt."Katsuki snickered and licked his lips. "There's other ways to have sex... orally."Izuku's face heated up as he looked down at the very promiscuous and very delicious blond. "You're unfair, Kacchan.""So we can't engage in the other stuff quite yet, but we can still have fun." Katsuki smirked and popped Izuku's dick out of his too-tight pants. "See? You're rock hard. You want this."Katsuki palmed the tip of Izuku's dick, causing him to moan and tilt his head back. "F-Fine. Do what you want, Kacchan. You will, anyways.""Damn right."Izuku swooned at Katsuki’s dominance as the blond dipped his head down and licked at Izuku's dick, swirling his tongue around the tip first. Slowly, he went down until he had half of Izuku's cock in his mouth. He moved up and down, bobbing on it, using his free hand to stroke what wasn't in his mouth. Izuku hissed in pleasure before threading his fingers into Katsuki's hair."Too slow." Izuku’s voice was almost a low growl at his need for more. He rarely displayed dominance in the bedroom, but this slow pace Katsuki was giving him didn’t sit well.Izuku shoved Katsuki further down his dick, causing the blond to gag as he was forced to deepthroat his lover. Katsuki glared up at Izuku but couldn't help feeling hard at the sudden roughness. If he were being quite honest with himself, Katsuki wouldn't mind having his face fucked by the verdette. Slowly pulling off, Katsuki panted out to capture some essence of air, barely able to breathe. He looked up at Izuku who was watching him with a familiar, measuring gaze."Deku... what's going on in that head of yours.""...How much I love seeing Kacchan choke on my dick. I want more~" Izuku licked his lips and threaded his fingers through blond tresses before pushing his dick back into Katsuki's mouth.Katsuki gagged again but took it in. He let Izuku guide his head up and down roughly as he was face-fucked by that very man. His heart swelled with love. My face is being fucked by this goddamn nerd and all I can think about is how much I love the ever-living SHIT out of him.Izuku started thrusting his hips, firmly fucking into Katsuki's hot mouth with fervor. "God, Kacchan. Your mouth feels so good... ah. I'm gonna- ah!" He hunched over as he thrust a few more times into Katsuki's mouth. His vision whited for the second time that day as he released his seed down the blond's throat.Katsuki swallowed all of it like the champ he was. "Fuck, Deku. My throat’s gonna hurt like hell tomorrow because of you.""Ah, sorry, Kacchan. It just felt really good..."Katsuki smirked dangerously up at Izuku. "Hey, asshole. Don't think this is over just yet. I need to be satisfied, too. So you better get on your knees and start sucking my dick."Izuku's face went bright red at Katsuki's forwardness. "Y-Yes."
Two weeks had passed and Izuku was finally in the clear to have anal sex again. This meant they could finally do the stuff they'd bought all the equipment for. Izuku gulped as he was blindfolded and led into their room by Katsuki's strong, callused hand. He was eagerly anticipating this, but he was also nervous that one or both of them wouldn't like it.BDSM. They'd both expressed interest in it and wanted to try it out. But with the whole prolapsed asshole thing that Izuku had going on (and the fact the neither of them had done this before), the instigation of it was put to the side.Katsuki led Izuku to the bed, both naked so clothes didn’t become an issue or obstruction. Katsuki laid Izuku down on his back and cuffed him up. He reached under the bed and pulled out a spreader bar with a smirk. It was one of the long ones they opted for instead of the short 12-inch one. This one went up to 48 inches. Grinning, Katsuki set it at the smallest it could go: 24 inches. Cuffing Izuku's ankles to the bar, he slowly started spreading the already-naked Izuku.Instinctively, Izuku tried to draw his knees together rather self-consciously."Awww. Is Deku being shy?" Katsuki's voice was like a purr as Izuku's breath hitched. He went to speak but Katsuki grabbed their next fun item and shoved it into Izuku's mouth, strapping it behind the greenette's head. Izuku immediately shivered as the ball-gag filled his mouth nice and full. They’d come up with a safe-word when the ball-gag wasn’t on, it being “katsudon” to Katsuki’s extreme displeasure. With the ball-gag, and Katsuki had to remind Izuku of this, there was a squeeze-based system. Three squeezes to Katsuki’s forearms to mean “slow down”, four to mean “stop”. In the event that he couldn’t squeeze, the same pattern went with knocking against the wood of the headboard: three knocks for slow, four knocks for stop.Biting his lip, Katsuki hovered over Izuku and took in the submissive form that was his Deku. He burned the image into his memory before plucking the feather from the pile of BDSM paraphernalia on their bedside table. He caressed the orange feather with his fingers before running it over Izuku's pert nipples, eliciting what he assumed was a moan from the other. Izuku arched, squirming slightly as the feather tickled his nipples, sending erotic sensations down his spine and to his groin. He was already standing at full mast."I guess Deku likes the feather." Katsuki's voice was amused as he grabbed a small object that looked like miniature anal beads. He smirked as he lubed it up and then pressed the tip of it into Izuku's dick, sliding into his urethra. Izuku let out a strangled sound as he realized he wouldn't be able to come properly. That wasn't the worst of it. Izuku shuddered as he felt a rubber ring slide its way down to the base of his dick. A cock ring. He wasn't even going to be allowed to reach orgasm with that thing on. It was all uncomfortable to say the least, but something Izuku was already getting used to. Orgasm denial was kind of hot, if he thought about it. Being so close to the edge but not being allowed to give in unless Katsuki said he could. Izuku shivered.Whimpering, Izuku struggled against the bindings a bit. He mainly did this for show, wanting nothing more than just to feel the cuffs dig into his wrists and leave marks. After all, Izuku was a masochist. He refused to spit out the gag, as he wanted all of this, but pretending he didn't made it more erotic for the both of them."Aw. Is Deku uncomfortable? Let's test out something else~" Katsuki grabbed Izuku's hips and dug his nails into the skin, dragging down hard enough to leave marks. He leaned forward to Izuku's inner thigh and bit down, causing Izuku to squirm and make garbled noises as he was pleasured. "Does Deku want more?"Izuku helplessly nodded his head, and without warning, the gag was removed from his mouth. He guessed Katsuki didn't like not hearing him."I'm sorry, I didn't catch that. Do you want more, Deku?""Y-yes, Kacchan.""What was that? Couldn't hear you."Right. Katsuki wasn't 'Kacchan' right now."Yes, master!"Katsuki leaned forward and bit, hard, into Izuku's neck. Izuku arched his back and cried out. "Ah! Kacchan! I... I want to see your face... master!""You'll have to be a good little slave to earn it."Izuku whimpered and nodded. "What... what does master want me to do?"Katsuki smirked and uncuffed Izuku from the wrists and ankles. He stood back to admire him as Izuku sat up and rubbed at his chafed joints. "Present for me, Deku. Show me how much you want my cock.""Y-Yes master." Izuku immediately turned over and shoved his chest into the bed, heaving his ass into the air. He even went a step further and used his hands to open up his ass for Katsuki. "F-For you, m-master..."Katsuki swallowed hard and walked over, squishing supple cheeks in his hands. Izuku had literally been working his ass off to get his butt to look round and plump for Katsuki. How cute."Your ass looks good there, Deku.""I... I wanted master to be pleased.""How cute, Deku. Doing all this for me~" Katsuki chuckled as he reached into the nightstand to pull out a toy that he wanted to try. Lubing it up, Katsuki pressed the black cone-shaped object into Izuku's ass."Ah~! Is this-""Yep, it's the toy you picked out, Deku." Katsuki smirked as Izuku let out a low moan as his ass was filled with the butt plug. "I know it's not as big as The Black Dragon, but it'll keep that hole nice and filled while we play."Izuku nodded as he felt the hilt of the plug hit his ass. He waited in anticipation and suddenly felt a silk collar wrap around his neck, delicate chain clinking as Katsuki put the leash on him. Katsuki yanked the leash to bring Izuku up and that's when Izuku felt it."Oh!" It was the other butt plug he’d been looking at. The one with the fox tail attached to it. Izuku felt Katsuki fasten the fox ears to his head and felt his breath quicken."On all fours, Deku."Izuku complied as he carefully pushed himself up on all fours, his cock absolutely straining against the cock ring at this point. He was so excited. Okay, so I already really like pet play... He gulped as he was led forcefully to a bowl and water. Katsuki tapped his head with a riding crop he'd picked up from somewhere. "C'mon Deku, chow time."Katsuki used his foot guide Izuku's chin to the food bowl, seeing as the verdette was still temporarily blinded. Watching the man degrade himself to eat the mashed up pork chops and gravy aroused the blond like no other. God-fucking-dammit this is hot... At this point, he just wanted to bury himself into Izuku's ass, but that would come later. And be so much sweeter when it did."Enough food." Katsuki cracked the whip over Izuku's bare ass, eliciting a yelp followed by a moan. "Aw, does the little fox like being whipped?"Izuku shuddered as he was guided to the water bowl and made to drink from it. Soon, his head was being forced up and he could only assume it was to look at Katsuki, since he was still blindfolded."Does Deku want to see his master's face?"Izuku whimpered and nodded rapidly. He wanted to look at Katsuki as he was treated like a pet and degraded like this."Then beg, Deku. Whimper and whine like the pet you are."Izuku felt his breath hitch and he let out a low whimper. He began whining as he crawled over to where he'd felt Katsuki's leg and began to nuzzle it. He rubbed his cheek all over the warm skin and found his way up to Katsuki's cock. With a gulp, he raised his face toward Katsuki."Aw. Does Deku want a treat?"Izuku nodded, panting like a fox in heat as he began to lick Katsuki's cock desperately. He whimpered and whined and soon, the blindfold was off. Blinking slowly, he looked up at Katsuki and shuddered at the utter dominance the other was exuding. He begged with his eyes. He wanted Katsuki's dick. He wanted it so badly."I guess Deku can have a treat. Go on, boy~"Izuku gasped and moved forward to immediately take the tip of Katsuki's cock into his mouth. He gave a small slurp before wrapping his tongue around it and bobbing his head up and down. He used his free hand to stroke what wasn't in his mouth. Flicking his eyes up, Izuku looked at Katsuki's face - so beautiful when it was blissed out. Izuku moaned and took Katsuki's dick all the way to the hilt, feeling the tip hit the back of his throat. He gagged a bit, but was soon roughly pulled away by his hair. Whimpering, Izuku looked up at Katsuki, confused."Ah, ah, Deku. You're not allowed to make Master come before you."Izuku's eyes widened and he was flipped over, knees scraping against the wood of the floor as he was assaulted with the whip. Each crack of it hit his back in a painfully blissful sensation. Izuku gasped and moaned, clawing at the ground as Katsuki struck him multiple times with the whip.Katsuki gave pause for a moment, hand running over the welts he’d made against Izuku’s skin. Taking a moment, he kissed one and looked to Izuku. “Are you doing okay, Deku? Do we need to stop?”Izuku took in a shaky breath and shook his head. “I’m alright, Kacchan… I can still go… please continue.” With a nod to each other, Katsuki cracked the whip again, resuming his role as a Dom."K-Kacchan~ ah!""Is Deku at his limit?"Izuku shuddered with a whimper. His cock was unbearably painful with his denied orgasms. He looked back at Katsuki and in one swift motion, Katsuki's cock had replaced the butt plug. Arching his back, Izuku screamed in pleasure as Katsuki immediately thrust into his prostate over and over again. Katsuki warmed his hands with tiny explosions and used them to burn Izuku's ass cheeks, eliciting sweet moans from him."Do you want to come, Deku?""Y-Yes, master! Please. Please let me come~!"Katsuki bit his lip and removed the insertion and the cock ring. With a few pumps to Izuku's cock, the greenette was sent over the edge into a blissful orgasm. Izuku screamed in euphoria as his vision whited, dotted with black static. Katsuki bit down hard into Izuku's neck as the man beneath him clenched tightly around his cock. Izuku moaned out again as Katsuki thrust a few more times, biting in several places to stifle his own moan, before he reached his orgasm, too. The blond shuddered as he shot his load deep inside his lover's ass.Panting, Katsuki pulled out and rolled over as both he and Izuku collapsed on the ground."I... I think that's the best sex we've ever had, Kacchan...""...Definitely..."
Both of them ended up passing out for the next couple hours, but Katsuki woke with a startled yelp when his side was jabbed hard. He looked over to Izuku, who was pouting."What?""My ass hurts and it's full of your come. Actually... I hurt all over..."Katsuki nodded and grabbed the blanket off the bed, wrapping it around Izuku and picking him up. "I'll wash the sheets in a moment. Let's get you to the bathroom so I can clean you out."Izuku nodded and curled into Katsuki's chest as he was taken to the bathroom. Katsuki sat Izuku down on his knees and tossed the blanket out into the hallway. "Can you bend forward for me, Deku? I need you to spread so I can clean you out properly."Izuku nodded and did as he was asked. He flinched as he felt Katsuki's fingers dig out all the semen that had accumulated within him in that one session. His stomach hurt from being filled up from the wrong end, but Katsuki was being very sweet, so he wouldn't complain. Shuddering when he felt hands run down his back, Izuku looked up at Katsuki."What's wrong, Kacchan?""I really did a number on you. You have so many bitemarks and bruises and burn marks..." Katsuki sounded a little sad but Izuku shot up and limped to the mirror to look at his keepsakes. Izuku beamed proudly and shook his head."Kacchan, don't be sad. I wanted this... visible proof that I'm yours. Forever..." Izuku looked back at Katsuki, only to be greeted with the sweetest kiss the blond had ever given him."Damn right, you're mine. And I- ah!" Katsuki clamped a hand over his mouth as he looked down to where Izuku had decided to bite him on the neck. "What the fuck, Deku?""I wanted to leave my own proof...." Izuku traced his fingers over the mark, and Katsuki sighed. Ruffling Izuku's hair, Katsuki headed for the door."Wash up, Deku. When you're done, call me so I can get you. You're gonna be sore, so the least I can do is help out," Katsuki's cheeks tinted a slight pink as he scratched the back of his neck and left the bathroom. Izuku giggled and shook his head."You're too cute, Kacchan."After cleaning himself up, Izuku called for Katsuki, and true to his word, Katsuki entered and picked Izuku up."Where to?""Living room. I wanna watch a movie." Izuku hummed in delight as he was carried over to the couch and set down gently. A moment later, his favorite comforter was enveloping him and Katsuki was holding out a few menus. "What do you want for dinner?""Hmm. Good question... I think I want katsudon!"Katsuki sighed and shook his head, but an amused smile was on his face. "I fuckin' knew it. Good thing I know you so damn well that I started preparing it while you were showering."Izuku grinned happily as Katsuki kissed his forehead."Kacchan. Why are you being so gentle all of a sudden?" Izuku tilted his head at the blond. Katsuki's response was to turn beet red."Because... well, you remember reading up on the BDSM shit with me and... a crucial part of it is that ‘aftercare’ shit. Essentially the Dom has to make sure their Sub is mentally okay. They take care of the wounds and treat them well... It's to remind them that it’s all just sexual play and that... the Dom still cares for their Sub...." Katsuki stated as he scratched his cheek.“Oh yeah. I got so caught up in the physical aspect of it, I forgot about the mental recuperation…” Izuku laughed slightly. He smiled warmly and pulled Katsuki down to his level to claim those lips for himself. "Kacchan. You're always thinking about me... It's so enamoring."Katsuki blushed more. "Well... of course I'm always thinking about you... you've never been off my mind... ever."Izuku grinned and clung to Katsuki."Oi, Deku. The katsudon's gonna burn.""Let it burn. I'm hugging the man I love."Katsuki turned several shades of a deeper red and sighed out. He sat on the couch and let Izuku nestle in his lap."I love you, Bakugou Katsuki...""....I love you, too, nerd."They nuzzled for a moment and then Katsuki popped his head away."...Kacchan...?""Hey... what would you do if I bought you a ring and asked you to marry me, Deku?"Izuku blinked and then felt his heart swell up with love and pride. "I'd say 'yes' in a heartbeat."Katsuki nodded and looked Izuku dead in the eyes. His arms tightened a little, giving away his nerves. "Well... I don't have the ring, but... Midoriya Izuku... will you marry this asshole?"“Yes!” With a smile too big to contain, Izuku pulled Katsuki down and kissed him soundly. “Yes!”