[NSFW!!!] 8 Simple Rules (for screwing my Childhood Friend) - Chapter 1

Chapter One: What happens in the bedroom, stays in the bedroom.

It began with a particularly awkward training session. They'd been working for three hours straight in the hot sun, hardly a water break to be seen, and Izuku was exhausted. When Katsuki landed a solid blow to his gut he hit the ground with a long groan, barely finding the time to open his eyes before Katsuki was on top of him, pinning him to the ground. He squirmed, but Katsuki held him in place with zero effort, not giving him even an inch to risk a burst of One For All coming his way.

"Do you concede, nerd?"

"Never!"

He writhed again, fighting the grip around his wrists, but Katsuki just shifted his weight onto Izuku's thighs, pulling both Izuku's hands above his head and slamming them into the grass. 

He was surprised he even had the energy left to pop a boner.

Izuku froze in place, flooding red, his green eyes growing wide as he stared up at Katsuki in alarm

"I give, I give!" he insisted, rolling over the moment Katsuki gave him a little room to breathe. 

Panting, he squeezed his eyes shut, willing the rush of blood to go away. Boner killers, boner killers, God damn what was his usual boner killer? His mind was full of Katsuki pinning him down, of that gorgeous smirk twisting across his face, of that flash of excitement in eyes like a field of fire.  

Boner killers, god damn it!

A squeaky little voice sounded from across the grounds, and Izuku breathed a sigh of relief.

"Mineta," he mumbled into the dirt. "Mineta flirting. Mineta's face when we go to a hot spring. Mineta's laugh when he gets paired with a girl for team exercises."

"What are you mumbling about, nerd?"

God damn it.

He turned his head slightly, still burning bright red, although his pants had loosened a little at the crotch. Katsuki stared down at him, waiting pointedly, and when he didn't respond, a heavy black boot landed on his ribs. Gently, he had to admit.

"Are we going again or what?"

"Ah... Yeah, of course. Just, um..."

"Wrap it up, folks!" a resounding voice echoed through the training area. "Grab some water and head off for the night!"

Izuku breathed a sigh of relief, despite the frustration on Katsuki's face. He gritted his teeth, unimpressed, and for a moment Izuku felt guilty.

"Let me get some water and sunscreen," Izuku requested. "We can stay late and go again."

"Yeah?"

"Yeah. One minute."

Katsuki offered him a hand, and against his better judgment, Izuku accepted. Katsuki hauled him to his feet in an instant, as if he wasn't fatigued or tired in the slightest from their three hours of intense training, and not for the first time, Izuku envied his childhood friend.

He followed two steps behind as Katsuki led the way to the gates, where their bags laid in wait. Their classmates were packing things away, making plans and laughing together as they gathered their belongings, but Izuku just reached for his water bottle.

"Everything okay, Deku?" Ochako asked brightly, as she leaned past him to reach her bag. "You have a weird look on your face."

"Frustration!" he answered quickly, hoping his blush wasn't too obvious. "Kacchan floored me again, it's like the heat doesn't bother him at all."

"He does require sweat for his quirk," Tenya pointed out, adjusting his bag straps as he waited for the pair. "The heat is probably an advantage for him, really."

"I know, but it still seems wrong," Izuku pouted. "We're gonna go again, so you guys can leave without me."

"Are you sure you don't want us to wait?"

"No, it's okay, we might be a while. Save me some dinner, okay? Um, and Kacchan too, if Kirishima doesn't do it."

"Will do! Let's go Iida, I really need to sit down."

"Yes, that does sound nice."

They trailed off after the rest of their classmates, disappearing in twos and threes until only Katsuki and Izuku remained behind. Katsuki had earned them reluctant permission to remain, with plenty of warnings in tow, and he leaned against the fence with his hands in his pockets as he waited for Izuku to be ready.

The blue of the U.A. Gym uniform suited Katsuki well. Dark enough to not look out of place compared to his normal attire, but colourful enough to offset his pale hair. It even seemed to bring a sheen to his eyes, the blue and red creating a stark contrast, each making the other pop.

"Done staring?"

"Sorry," Izuku mumbled, slapping some sunscreen on his face. "Okay, let's go."

"Idiot," Katsuki sneered, taking a few steps closer. "Come here."

Izuku tensed as the hand reached out, waiting for an explosion or at the very least a rough shove, but instead the callused thumb smoothed across his cheek with a strange gentleness. He blinked a few times, stunned out of his words, and Katsuki's hand was gone as quickly as it came. 

"Doesn't work if you don't rub it in," Katsuki rolled his eyes. "Come on, nerd, I need to beat your ass at least once more before we pack it in for the night. Gotta work up an appetite somehow."

Izuku nodded, shaking himself out as they moved back into the more open part of the fenced off area. They had plenty more room to play with, now that they weren't competing with ten other pairs, and Izuku knew Katsuki would take full advantage of it. Izuku was tired, much more so than Katsuki. He would make this a battle of speed, of movement, would rely on seeing Izuku's moves coming rather than predicting them ahead of time. 

Izuku, on the other hand, was a master of predicting Katsuki's moves. Even when Katsuki had realised it, and had started doing the opposite of what Izuku expected, within a week he'd nailed down the new strategies. At this point Katsuki had given up on trying to surprise him, had accepted that the nerd could read him a mile away, that he knew him inside and out, and instead he just aimed to be faster and stronger. It didn't matter if he saw the moves coming, if he couldn't do anything about it.

They'd had this friendly rivalry going since the middle of their first year, back when Katsuki had stopped being at Izuku's throat and when Izuku had stopped trying to emulate him at every turn. When they worked together, learned together, learned from each other and shared their experiences and just worked, they made a formiddable team.

Their classmates called them unstoppable, but Katsuki and Izuku would never dare to use that word, not after they'd watched All Might's fall.

So what was the plan, then? Katsuki was going to use speed and space, was going to try to wear him out and outpace him, so what was the logical counter-measure? Using his speed against him, Izuku supposed. Waiting for that moment where he charged in and using it to land a blow of his own. Stand his ground, wait for the movement, counter. Easy.

Then again, with Katsuki it was never that easy.

Katsuki counted down from three, and Izuku braced himself, ready to counter at whatever angle Katsuki would throw at him first. What he didn't expect, however, was for Katsuki to launch at him the moment he said go, getting right up close and personal. Izuku threw his arms up to block the first strike, immediately dragged into a flurry of fists and low kicks, trying to knock his legs from under him. 

He'd expected Katsuki to start a chase, but this was more like a vendetta. 

"Okay, okay!" Izuku groaned as his ass hit the ground, a sharp pain bursting through his back. "You win. I'm sorry Kacchan, I guess I'm just too tired for this."

"You should have said so," Katsuki rolled his eyes, taking a step back. "You're the one who volunteered to go again."

"Because it's not fair," Izuku whined. "I'm exhausted and you're not even out of breath!"

"Are you kidding me?" Katsuki scoffed. "I could use a damn nap right about now, I'm tired as fuck."

"What?!"

"It's been three hours, nerdass, what do you expect?"

Izuku groaned again, lying back in the grass, squinting a little when the hot sun beat down on his face. He didn't speak for a minute, but then Katsuki was moving again, lying down beside him with a faint sigh.

"Be honest with me, shitnerd."

"Yeah, sorry."

"It's fine."

They fell silent, watching the clouds go by, and Izuku smiled to himself. They didn't get moments like this very often, where they were free from teachers bleating instructions and classmates yelling about nothing. Izuku loved his class, loved all his teachers, but just to lie in the grass and be still and silent was a rush of its own. He glanced over as Katsuki peeled off his shirt, casting it aside, and squeaked a little when he saw the rock hard abs within reach of his hand, glistening with sweat. 

"You like what you see, nerd?"

"Don't be ridiculous," Izuku stammered, rolling over to look away. "What are you even talking about?"

"You think I haven't seen you perving? Little shit." 

Izuku burned red, and Katsuki smirked, rolling onto his side to watch Izuku curl into himself in shame. He propped his head up on his hand, contemplating, then gave Izuku a firm shove in the back.

"I've seen you eyeing the half-and-half bastard," he continued, smirking to himself. "I don't get it, but I see you looking."

"Shut up," Izuku mumbled half-heartedly. "I don't."

"I mean, I know we're pretty hard up for eye candy in our class, but come on. You could have a crush on a pro or something, like a normal teenager. Or is that what your obsession with All Might is about, huh?"

"No," Izuku hissed. "It's not like that."

"Sure, I believe you. Listen, if you're gonna blatantly perv at people, at least make it someone worthwhile."

"Like you and Kirishima?" 

Izuku kicked himself immediately for the words, waiting for the anger or the sudden blow to hit, but all he heard was a short laugh.

"Well he does wear that stupid shirtless costume. What, you jealous or something?"

"No."

"Not jealous, not pent up, not desperate?" Katsuki teased. "I suppose that raging hard-on you were packing earlier was nothing, right?"

"Kill me."

"Torture is more fun."

Izuku hugged his knees tightly, pressing his face into the dark space it created, and letting out a long, slow whine. Katsuki was going to ruin everything. He was going to tell all his friends, all their classmates, was going to make him an outcast all over again. 

"Quit muttering," Katsuki scowled, climbing to his feet and giving Izuku a swift kick in the ribs. "I'm starving. You coming back to the dorms or you just gonna lie here and whine like a loser some more?"

"Kill me," he said again. "Take One For All from me then kill me."

"Get your ass up, fuckin' idiot."

He grabbed Izuku by the jumpsuit and yanked him off the ground, scowling at the teary-eyed face that looked up at him pitifully. All their lives they'd been together, and the fuckin' idiot still thought he was a monster.

"I'm pretty pent up too," he found himself admitting, before he could reconsider the words. "Hard to jerk it with explodo-hands, y'know?"

Izuku stared at him blankly, and Katsuki shrugged it off, releasing his fistful of jumpsuit in favour of stuffing his hands in his pockets.

"Could use a good jerk-buddy, if you want to fool around or some shit."

"W-What are you even saying, Kacchan?" Izuku choked on the words, debating whether he wanted to laugh it off as a joke, or agree enthusiastically. "Fool around? With me?"

"I know you can keep a secret."

"I literally told you the one thing no one was supposed to know, Kacchan."

"I don't count. You didn't even tell your mother."

"Y-Yeah, well..."

"Offer's on the table, anyway. I'm gonna go get food now, you do whatever the fuck nerds do when I'm not around."

Izuku watched his back as he left, watched the sweaty, taut muscles move, his shirt slung over his shoulder. It was no wonder the league of villains wanted to recruit him, that body was downright criminal.

He gathered his gear from the sidelines, mourning over his empty water bottle, and as the sun finally began to dip low in the sky, he made his way back to the dorms.

────────────

Izuku didn't understand why he was hovering outside Katsuki's dorm room door. For one thing, he was pretty sure Katsuki's comments had been some kind of cruel joke. For another thing, if he lingered much longer he was bound to be seen by one of Katsuki's floormates on a late night snack run or something of the sort. And for a third thing, Katsuki would have been asleep hours ago.

He jumped when the door handle turned – it was too late to run, could he make some excuse? Homework help? Lost his phone? Something?

"You just gonna stand there or what?" Katsuki growled, jerking his thumb toward the bedroom behind him. "Someone is gonna see your ass."

Without a word, Izuku stepped inside. The door locking behind him was deafening in the quiet night, and a shiver ran up his spine. He was actually here to do that, against all odds. Sure, if he was going to screw around with someone, experiment with someone, it kind of made sense for it to be Katsuki. They knew each other better and deeper and more intimately than anyone else. Still, though, the thought of it gave Izuku chills.

For a moment the pair just stared at each other, neither of them willing to speak, then with a little sigh Katsuki sat down on the edge of his bed.

"Don't give me that dumbass look, you're the one who showed up."

"You were waiting up for me," Izuku countered, glancing at the clock. 

"You can't prove shit."

Izuku smiled faintly, taking a few steps closer, and when Katsuki didn't say or do anything to stop him, he sat at Katsuki's side.

"You want me to jerk you off?" he asked bluntly, eyes darting down to Katsuki's sweatpants. "I never thought about the fact that you can't."

"I have my ways," Katsuki mumbled, his cheeks dusting with a hint of pink. "It's not the same though."

"Yeah, I'm sure it's isn't. I can if you want, we're friends. Friends help each other out, right?"

Katsuki snorted at that, but nodded, shifting himself to lie on the bed properly. Izuku pushed his thighs apart to kneel between them, then paused again as he reached for Katsuki's waistband. He waited a moment, then another, waited to see if Katsuki would suddenly snap out of it and yell at him to fuck off, but those scarlet eyes just watched, waited too.

He slipped his fingers into the soft fabric, tugging it downward, his breath catching when Katsuki's cock sprung free. Katsuki didn't wear underwear with his pyjamas, he noted. He was thick, a little longer than Izuku, and already hard and throbbing. Izuku couldn't understand why Katsuki had such a good poker face, why he made no move to acknowledge the erection, but Izuku supposed if he'd gone through his teenage years so far without being able to just wrap a hand around it, he was probably pretty good at dealing with the thing.

"Do you have lube?" Izuku asked quietly.

"Lube?"

"Yeah? To, uh... You know, less friction?"

Katsuki raised an eyebrow at him, and Izuku smiled sheepishly.

"You really don't do this, huh? Okay."

Izuku wrapped his hand around the shaft, a little more confident with Katsuki's pink cheeks and lack of expectations beneath him, and gently massaged the head with his thumb. Katsuki's hands balled into fists immediately, curling into the bedsheets, and Izuku smiled to himself as he continued. Soon there was precum dribbling from the slit, and Izuku made the most of it to help him out. With the fluid to help, he slowly moved his hand up and down the shaft, spreading the moisture right down to the base as it continued to leak out. Katsuki watched with fascination, like this was something he'd never seen or even thought about before, and Izuku couldn't help but smile at his friend's innocence. 

"I'm gonna go a bit faster, okay?" Izuku warned him. "It's gonna get... Well, you'll see."

He moved his hand a little quicker, and soon Katsuki's head was falling backward, unable to keep his eyes on what was going on. His chest rose and fell quicker than Izuku had ever seen it at training or during a fight, and his hips shuddered, bucking up into Izuku's hand.

"You like that, huh?" Izuku teased, rubbing his thumb over the slit again. "Feel good, Kacchan?"

Katsuki nodded, gnawing at his lower lip to keep from making a sound, and Izuku couldn't help but grin. There was something about seeing his friend like this that was so entertaining, reserved just for him, the one who had always been there. Izuku moved a little faster again, twisting his hand a little every time he reached the head, and it barely took half a dozen strokes before Katsuki was cumming, breathing hard as his hips shuddered, not sure if he wanted more friction or less, more movement or no movement at all. He gasped, riding on a wave of bliss as Izuku dragged out every drop of semen, spilling it all over Izuku's hand, all over his sweatpants and singlet. 

His body went limp, every muscle turning to jelly as he spread-eagled on the mattress, and Izuku simply grinned down at him fondly.

"Feel better?"

"God. Yeah."

He reached for a box of tissues, cleaning up his hand first, then methodically working his way through the mess that stained Katsuki's body. He stripped the clothes off and tossed them in the laundry hamper, then glanced around to reaquaint himself with Katsuki's room. He'd spent a little time in here, working on group projects or occasionally sharing notes on villains or heroes, but it was rare enough that he still lost track of where to find things.

"Washcloth?" Izuku requested, Katsuki cracking one eye open to look.

"Bottom drawer."

He pulled open the dresser drawer and retrieved one, heading for the bathroom to dampen it in the sink. It took a moment for the water to warm up, and by the time he returned, Izuku wasn't sure if Katsuki was even awake. Still, he gently cleaned the last of the sticky residue from his pale skin, extra careful around the more sensitive areas, then dug out a clean change of clothes and set them on the edge of the bed.

"All better?" Izuku asked teasingly, when Katsuki cracked an eye open again. "Get some rest, Kacchan."

"Wait."

"Hmm?"

"I want to watch. You, I mean."

"Watch what?"

"Jerk off for me."

Izuku tilted his head to the side, a little confused by the request, and Katsuki hauled himself up to sit against the headboard. He gestured toward Izuku's pants, waiting with a surprising amount of patience, and Izuku blinked at him a few times.

"You want to watch me masturbate?"

"Yeah. Want to see what it looks like."

"Well... Okay, I guess. You're not... Filming this, or something, are you?"

"Fuck off. What happens in the bedroom, stays in the bedroom."

"Is that rule number one?" Izuku grinned. "You ashamed of yourself?"

"Ashamed of you," Katsuki retorted, but with a little amusement in his voice. "Show me, okay?"

"Yeah."

He slipped off his baggy pants, sneaking a glimpse at Katsuki's face, waiting for a reaction that didn't come. It would have been nice to see him pleased or impressed, but the lack of a cringe or sneer was pretty good too. He wrapped a hand around the base of his cock, lubing himself up with what was left of Katsuki's cum puddles, and sat back on his heels as he began to move in earnest. Katsuki watched with wide eyes, attention held solely by Izuku's hand, watching it smoothly shift up and down, up and down, Izuku's breaths growing rough and haggard. 

Izuku's movement stuttered when he felt Katsuki move, a warm hand coming to rest over his, feeling his grip move. He forced Izuku's hand to go a little faster, smirking again when Izuku faltered, but with Izuku's hand creating a safe barrier between the explosive sweat and the sensitive cock, he grew a little bolder. Izuku was moaning, eyes squeezed shut, and soon Katsuki was the one doing all the work, letting Izuku's hand go limp and just move with him. The nerd's face was sweaty, contorted, pitiful almost, and Katsuki moved a little faster again. 

With a last little squeaky yell, Izuku spilled between them. Most of the cum went straight onto Katsuki's stomach, trickling down toward his crotch, but plenty of it landed on their hands as well, and Katsuki's eyes glittered as he looked at it. Izuku cracked his eyes open to survey the damage, an apology waiting on his lips, but before he could force any of the words out of his dry throat, Katsuki raised his soiled hand to his mouth and licked.

Izuku saw stars, a long, low moan parting his lips, and Katsuki snickered to himself as he took another long lick. The stuff tasted foul, he wouldn't deny that, but watching Izuku fall apart just watching it was too good to pass up, worth far more than a brief burst of bitterness on his tongue.

"Stop," Izuku protested weakly, curling into himself. "Cut that out."

"What's wrong, Deku?" Katsuki sang, contemplating his sticky fingers. "You like what you see?"

"Yes," Izuku grumbled, dropping his burning face into his knees. "I do, idiot."

"Look at me," Katsuki demanded, using his clean hand to grab at Izuku's curls and yank his head up. "Watch. Don't take your eyes off me."

Izuku shuddered, but nodded, painfully hard again already as he watched Katsuki lick every drop from his fingertips. He reached for the tissues again next, cleaning off his stomach, then without warning his hand was on Izuku's knee, pulling it aside to get a good look at his incredibly alert dick.

"Fuckin' perv," Katsuki sneered. "Your hand isn't good enough, huh? Guess I'd better go straight to the source."

"Huh? Wha-" he cut off his words with a moan as Katsuki leaned in, licking at the head of Izuku's cock. "Ohhhh, God, yes."

Katsuki's eyes looked positively wicked as they darted up to see Izuku's face, to see the pink lips hanging open, the eyelids heavy with lust. Izuku reached for him, tangling his hand in Katsuki's hair, and Katsuki hummed in contemplation. With a little smirk he leaned in again, taking the swollen head into his mouth and sucking hard, tongue swirling over the sensitive tip. He found the spot with his tongue that Izuku had been massaging on him not long ago, the spot that made Izuku squeak when he pressed on it lightly, and locked eyes with the hazy emeralds as he sank down lower.

"God, Kacchan," Izuku moaned, "that feels so good."

He bobbed his head a little, getting used to the feel of the motion, figuring out just how to position himself to let the cock sink down his throat without making him want to gag. It wasn't like he'd never thought about this, in fact he'd thought about it a lot, and while he didn't really expect his first time to be with Deku, he had no complaints about the strong, solid mass that filled him up so perfectly. 

Izuku tapped his head pointedly when he got close, but Katsuki already knew it was coming. He'd felt the way the cock twitched under their shared grip, when he'd cum just minutes ago, and he felt that same movement against his lips and tongue as he moved, straining for release. He kept up his pace with vigour, and the moment he felt the fluid start to come, he began to swallow, sinking in deep. Izuku shot straight down his throat, burning a little, and Katsuki's eyes watered in response. He kept it up valiantly, though, kept himself in close, swallowing hard. It was like the dumb nerd had a never ending supply of cum in that hot dick, like he wanted to coat Katsuki's insides with it, but frankly Katsuki couldn't complain. He moaned quietly as it slowed, milking out everything he could possibly get from the nerd, waiting for the cock to soften before he reluctantly let it fall from his lips.

"You enjoyed that," Izuku said breathlessly, tightening his grip on blond hair a little. "I'm impressed, Kacchan, I didn't think you were such a bottom."

"Fuck off."

Izuku pushed him backward, pinning him to the bedsheets, and shifted a little until he was straddling Katsuki's thighs. He ground his ass down against Katsuki's dick, smirking when he felt it spring to life beneath him, and Katsuki whined softly.

"I thought it was hot when you pinned me down," Izuku admitted, leaning his hands on Katsuki's abs to brace himself. "Little did I know, you wanted the same thing. You wanted to be held down, didn't you? Held down and fucked."

"Stop."

Izuku climbed off immediately, hands up as if he were surrendering, and Katsuki gave him a confused look, almost hurt.

"What are you doing?"

"You told me to stop."

Katsuki burned scarlet, his eyes darting away as he fought to find the words.

"Not like that, don't... Don't stop."

"What do you want, then, Kacchan? You've got me off twice, it's your turn now."

"Anything."

"Anything?"

Katsuki nodded, fingers tightening in the sheets, still not quite capable of meeting Izuku's eyes.

"Like you said," Katsuki mumbled. "I want... I want what you'll give me."

"Okay." Izuku smiled to himself, slinging one leg back over Katsuki's body again and leaning in close. "You just relax, then."

Katsuki nodded, letting Izuku's hands roam over his stomach, sliding up to his chest. Rough thumbs rubbed little circles over Katsuki's nipples, feeling them harden to tight little nubs, then leaned in to lick across one with a hot tongue. When Katsuki hummed, Izuku shifted to the other side, pinching at one and nipping at the other with his teeth. Katsuki moaned, his back arching, and Izuku couldn't resist a smirk as he tugged lightly. 

"You like that, huh?" he asked, letting the nipple slip from his mouth. "Is this how you've been getting off alone? I bet you can cum without even touching your dick, huh?"

Katsuki shook his head faintly, eyes squeezed shut tight, and Izuku hummed in contemplation, considering the pitiful, needy form beneath him.

"What do you do, then, Kacchan? What does my needy little slut do to get himself off?"

"Pillow," he mumbled, ignoring the slights. "Rub."

"Ohh? You just lie here and hump your damn bed until you cum?"

Katsuki nodded, and Izuku laughed in a strangely low tone. He shifted his fingers back to Katsuki's nipples, rolling one between each thumb and forefinger, and licked lightly at the juncture between Katsuki's neck and his shoulder. He bit down lightly, testing it out, and when Katsuki writhed under him he smirked.

"That's what I like to see," he teased. "Desperate and needy and helpless, just my type."

"Y-You wanted to b-be," Katsuki gasped for air, struggling to get the words out as Izuku pinched harder. "p-pinned down."

"Because you looked hot like that," Izuku agreed. "But you look far more sexy like this, Kacchan. I like this the best."

"Y-Yeah?"

"Yeah."

He bit a little harder at Katsuki's neck, sucking lightly, and Katsuki whined at him stubbornly. Hickies were probably beyond the acceptable limits, visible marks he would have to explain later seemed like a recipe for a pissed off Kacchan, but still he trailed down the shoulder with little nips and licks, sucked at sharp collarbones, and bit down on the edge of tight pectoral muscles.

"Deku," he moaned, "God, Deku."

"Feel good?" Izuku smirked, teeth grazing over a pert nipple. "You like being bitten, huh?"

Katsuki nodded, and Izuku slid back down the bed, pushing Katsuki's leg aside to reach a sensitive inner thigh. The skin felt like velvet, smooth and soft to the touch, and Izuku immediately marred it with his teeth, biting down and sucking hard as Katsuki squirmed, moaning uncontrollably. He moved a little higher and repeated the process, leaving a trail of deep purple blooms up his skin, until his nose grazed at the seam between his leg and his crotch. He smirked to himself when Katsuki whimpered, reaching for him only to find his hand slapped down against the blankets, helpless as Izuku's teeth grazed closed and closer.

"Please," Katsuki choked out, making Izuku pause. "Not there."

"You scared of me, Kacchan? Think I'm gonna hurt you?"

Katsuki nodded, eyes squeezed shut, hands clenched into fists. Izuku softened a little, then, pressing a gentle kiss to the base of Katsuki's cock.

"I would never, Kacchan. I'm gonna make you feel real good, okay? The best you've ever felt."

Katsuki nodded, desperation taking him over again as his dick throbbed, and Izuku smirked as he kissed along the shaft to find a pulsating head. His lips touched that, too, making the whole thing twitch, and then his tongue darted out to poke at the slit.

"I won't be as mind-blowing as you, Kacchan," Izuku warned. "But I'm still gonna suck you good and hard, okay? How does that sound?"

"Good. Please."

"You're such a good boy, Kacchan. So polite for me."

Katsuki moaned again, and Izuku couldn't hold back his laughter.

"You like being praised, Kacchan? My good boy?"

"Please," he whimpered. "Touch."

"Okay, since you've been so good."

He licked a longer stripe along Katsuki's cock, amused to find it still sticky from their previous adventures, and curled his fingers around the base firmly. A little at a time he sank lower, tongue swishing back and forth over the prominent vein on the underside of Katsuki's cock, until his lips touched his own hand and he paused. 

He shifted his grip a little, sank a little lower, watching Katsuki's chest rise and fall roughly.

"So good," he mumbled. "Deku, so good."

Izuku hummed his agreement, making Katsuki gasp, and if Izuku's mouth hadn't been so occupied he would have giggled. He shifted another finger, sinking a little lower, and moaned to himself as the tip touched the back of his throat. Katsuki was already tensing, already whimpering as he clung to whatever he could find – sheets, pillow, headboard – and Izuku hummed again as he bobbed his head. He couldn't quite get all the way in, not like Katsuki had, but damn if he wasn't gonna get close.

When Katsuki began to squirm again Izuku knew exactly what was coming. His dick twitched insistently in Izuku's mouth, aching for release, and Izuku began to swallow, just like Katsuki had done for him. The semen burned, making Izuku gag a little as it hit the back of his throat. He wasn't sure how Katsuki had done it, honestly, but here he was with fluid spilling into his mouth and Katsuki moaning beneath him, hips twitching as they tried to buck into him, the urge to thrust overwhelming. Izuku's hand stayed firm against his crotch, warning him, creating a barrier between them, and Katsuki managed to keep himself just barely under control. 

"Deku," he whined, as the stream slowed. "God, Deku."

Izuku slipped himself away as Katsuki stilled, breathing heavily, and slowly he crawled up the bed to see the flushed face, the eyes that couldn't quite manage to keep themselves open. His eyelashes fluttered as he tried, peeking through the little crack that formed, and Izuku smiled at him fondly.

"Feel better now?" he teased. "Not so pent up anymore?"

"Yeah," Katsuki nodded. "What about you?"

"I mean, I could have just jerked off, personally," he smirked. "But yeah, I had fun."

"None of this leaves the bedroom," Katsuki reminded him breathlessly. "Don't go telling all your shitty friends how you got sucked off by the one and only Bakugou Katsuki."

"I'm sure all my friends would love to hear about how you like to be held down," Izuku smirked. "All the cute little noises you make, I could sell that recording for millions."

"Don't you dare, you sick little fuck."

"Maybe you should ask nicely then instead of being so nasty," Izuku suggested, leaning in to nip at his neck again. "Unless you want me to leave a nice big bruise on your neck for you to explain to everybody?"

"Don't you fuckin' dare."

"Nicely, Kacchan."

They fell silent for a moment, Katsuki debating with himself internally while Izuku just waited, smiling a little, expecting the inevitable.

"Fuckin' please," Katsuki spat. "Please don't fuckin' tell anyone."

"That's a little better, we'll work on that."

Izuku sat up and wiped himself off, reaching for his pants and dragging them up to cover his spent dick. He wiped Katsuki down too when he was done, reaching for the stack of clean clothes to tuck him away safely. Something about dressing him was strangely intimate, and Izuku wondered how it was that a blowjob could feel more detached than putting clothes on him. He pulled the blankets up to cover Katsuki, then leaned in, planting a teasing little kiss on his forehead despite the feeble protests and muttered curses it brought with it. 

"Sweet dreams, Kacchan," he smiled. "Call me next time you're all cute and needy, if you want. I don't mind letting you blow me again."

"Shut the fuck up."

"There's my good boy," Izuku smirked. "Goodnight."

"Night, fuck-ass."

Izuku crept back to his own room, pleasantly tired as he fell into bed, his head clearer than it had been in days. He probably needed to jerk off more often, if this was how it felt to go to bed spent. He rolled over onto his side, curling up with a pillow between his arms, and hummed to himself as he laid his cheek on the soft material.

Kacchan...