Work Text:
Eijirou didn’t like to think of himself as the jealous type.
To be honest, he didn’t think it was the manliest of emotions. It wasn’t cool not to trust your partner! And it always reflected bad on you, made you seem insecure in your relationship or just in life. So Eijirou tried to ignore those feelings as best he could, because he knew that at the end of the day, Katsuki would always be coming back to his bed.
But, even as an adult and a Pro-Hero, Kirishima Eijirou was only human.
And, yeah, Kastuki had done a lot to work through his issues over the years. He was even, dare he say, approachable in most situations. And while that had been great for the purposes of establishing their agency and getting them both to climb the ranks it had been terrible watching how people hit on his boyfriend without a second fucking thought about the whole thing.
Honestly, the straw that had broken the camel’s back had been stupid.
It was just a touch, simple, barely there. But watching the guy rub up and down Katsuki’s arm like that right after a really tough job that made that little voice in the back of Eijirou’s head that usually kept him from doing stupid shit go really quiet really fast. So, suffice it to say that Eijirou wasn’t really thinking when he’d grabbed his boyfriend’s hand and tugged him in for a kiss right in front of the guy and right out of his grip, the blond floundering a little bit as Eijirou plundered his mouth.
“What the fuck, shitty hair?!” Katsuki gasped, not exactly shoving him away but definitely looking a bit cross at the sudden affection in front of everyone. But at the very least that guy wasn’t touching him anymore.
No, only Eijirou was. Which was good.
But now he needed to think of an excuse for doing what he just did. Fuck. Fuck he hadn’t thought that far ahead. C’mon, Red Riot, you can think of something! You and Katsuki have been together for ten years! You know what he would wanna hear after something like this, right?
“I,” Eijirou started, his brain stalling out at Katsuki’s skeptical look, “you…” Fuck he really hadn’t thought this far and Katsuki would know if he was lying...fuck it. “That guy was being creepy and I wanted to scare him off,” he said after a moment, feeling his cheeks heat up as every word feels more stupid than the last.
“Wait, hold the fuck up,” Katsuki said as they started walking away, “you, Kirishima Eijirou, my boyfriend of ten years and vertiable ray of fucking sunshine...got jealous of an extra who just touched my arm.”
Wow, hearing it out loud made it feel even more stupid.
“Y-yeah, look, Suki, I’m so-” Eijirou yelped as Katsuki tugged him down by the shoulder, voice barely a growl.
“That’s so fucking hot and you better take my ass home right now and fuck me, Eijirou, or I’m gonna fucking make you do it here.”
Holy shit .
Eijirou waited for ten seconds before dipping down and lifting his boyfriend up in a fireman’s carry, the blond yelling mostly for show as the redhead ran them the few blocks they needed to go, jumping up the stairs to their apartment before putting his lover down, kissing him deeply as they fumbled in each other’s pockets for the keys. Katsuki got to them first, turning around in Eijirou’s hold with a little hiss, rubbing his ass into Eijirou’s crotch as he unlocked the door, the two of them stumbling in as the blond tugged his hair to get him at an angle to kiss. Eijirou kicked the door closed behind them as Katsuki tugged him forward, the blond toppling over the arm of the couch and dragging Eijirou on top of him, neither even bothering to try and kick off their boots.
“Mmmh Suki,” Eijirou moaned as they parted for air, panting as Katsuki leaned up to bite at the column of his neck, sucking marks into his skin roughly and wrapping his legs around Eijirou’s waist and dragging his gloved fingers down his back, thankfully having dropped the grenades at the door.
“Fuck, take your pants off,” Katsuki panted out, pushing Eijirou up to start tugging off his armor pieces, tossing them off to the side and grabbing at his belt. The redhead groaned at the sensation, grabbing for Katsuki’s own costume to get him just a little more naked. Katsuki groaned in displeasure as they had to stop grinding and biting at each other for him to toss away his boots and socks.
Eijirou found himself tugged into another rough kiss, Katsuki biting at his lips before grinning and pulling back. “Tell me,” he growled, biting at Eijirou’s ear, nails digging into his scalp as he wrapped his legs back around his waist to rub up against him, belt no longer in the way of their hardening cocks.
“T-tell you what, babe?” Eijirou asked, groaning as Katsuki rolled them, sitting astride his thighs and running his palms down his chest, dragging his nails to leave little scratches in their wake.
Katsuki pulled back, tossing away his shirt, running his own hands up his chest and squeezing at his pecs, bouncing once to show the way his pecs moved with him. “You know what I wanna hear, Eiji,” Katsuki said, moaning a little, arching into his own hands, “I wanna hear why you kissed me in front of that fucking extra.” He leaned forward again, draping his arms around Eijirou’s neck, ghosting their lips together to taste him.
Eijirou swallowed thickly, the tone of his lover’s voice, especially as naked as Katsuki was having stripped off his pants and boxers, making him shiver. “I-I didn’t want him getting any ideas…” he started, watching as Katsuki licked his teeth, reaching over to the side table to pull out a bottle of lube that they’d thankfully forgotten there a few weeks ago.
“Ideas about what, baby?” Katsuki teased, scratching down Eijirou’s chest again, practically purring as he slid down to the carpet between his legs. “Didn’t want him thinking he’d see me like this?”
“Fuck no,” Eijirou breathed out, cock twitching in his pants as Katsuki worked them open, his dick springing out.
“Why not, baby?” Katsuki murmured, eyes half-lidded, crimson and burning as he looked at Eijirou, stroking him with one hand.
“B-because,” Eijirou breathed, quickly getting overwhelmed by the feeling, arching into the touch.
“Because why?” Katsuki murmured, licking along the underside of Eijirou’s cock, sucking at the tip before popping off, “why are you the only one who gets to fuck my mouth and see me this fucking naked?” Katsuki’s rough voice was nothing more than a low growl at this point, sawed out of his chest, aroused beyond belief and Eijirou knew in that moment what to say. What Katsuki was looking for.
“Because you’re mine,” Eijirou breathed, looking him right in the eye, watching as Katsuki’s eyelashes fluttered and the blond moaned.
“That’s fucking right,” Katsuki breathed out, reaching for the lube, soaking his own fingers before reaching behind himself, hissing as he pressed a finger in while nuzzling the side of Eijirou’s cock, pre-cum streaking his cheek and shining in the dim light spilling from outside their window. “I’m all fucking yours, baby,” Katsuki crooned, leaning forward to suck at the tip of Eijirou;s cock again, langorously working his way down. Eijirou moaned, petting his hair, pushing Katsuki’s bangs away from his face to watch as he slowly sank between his lips.
Katsuki moaned softly, jolting a little as he brushed his own prostate, clearly a second finger pressing in far too fast. But that eagerness was sinking into Eijirou as well, the redhead barely restraining himself from fucking into his boyfriend’s mouth. But he wanted to last. “Fuck, I-I can’t even believe that you’re mine sometimes, babe,” he groaned out, gasping as Katsuki swallowed around him, “I-I fuck, p-please, Suki.”
Katsuki pulled off with a long slurp, licking his lips clean of saliva and pre, hips bouncing a little into his own touch. “Mmm what was that?” he murmured, kissing at Eijirou’s inner thigh, sucking a mark into the skin for good measure, “c’mon, Ei, tell me who my fucking boyfriend is. Tell me who the fuck the love of my goddamned life is. Who fucks me good every night and who fucks the bad attitude right outta me.”
Fuck, fuck he didn’t know what had gotten into Katsuki but god damn was it hot.
“Me,” Eijirou growled out, shivering as Katsuki moaned into his thigh, a third finger going in, “I’m the one.”
“Damn fucking right you are,” Katsuki moaned before freeing his fingers and slicking up Eijirou’s cock, sliding back into his lap and kissing him hard, biting at his lips, “you’re my fucking boyfriend, all fucking mine , now, beg me to take what’s yours.” Katsuki’s hands knotted in Eijirou’s hair, tugging roughly, enough to make the redhead whine deep in his throat, head tossed back against the back of the couch.
“K-Katsuki please,” Eijirou moaned, thighs shaking, cock leaking and cool from the lube.
“Please what?” Katsuki growled, licking over his pulse, sucking marks into his neck for the world to see.
“Ple-please let me fuck you,” Eijirou moaned, hips arching up, “l-lemme show you why you’re mine, fuck you good, fuck, please, baby?” Eijirou babbled for a while, listening to the way Katsuki’s breath wheezed from him with every word. “L-lemme be so fucking good for you.”
Katsuki reached behind himself, grabbing his cock before lowering himself on it, both of them crying out loudly at the sensation, Eijirou’s thighs shaking and Katsuki’s body clenching tight around him. “F-fuck,” Katsuki moaned, “always so fucking big in me, Eiji.” Katsuki bit at his ear before leaning back, hands pressed firmly to the redhead’s chest before grabbing Eijirou’s hands and pressing them onto his ass, squeezing till Eijirou got a firm grip.
“Whose ass is this, baby?” Katsuki moaned again, looking into his lover’s eyes and Eijirou gasped in return.
“M-mine,” Eijirou growled out and Katsuki arched his back, grinding down on him, sending sparks of pleasure down both of their spines.
“Fuckin’ prove it,” Katsuki whispered into his ear before grabbing onto his shoulders. And, well, who was Eijirou to turn down a good fucking deal?
Eijirou grabbed Katsuki by the hips, lifting him and slamming him down, listening to his punched out moans with a pleased grin of his own. Katsuki’s hands sparked against his hardened shoulders with every bounce, the slap of his ass against Eijirou’s thighs sounding so fucking good that the redhead could help but toss his head back until Katsuki grabbed his hair in one fist, focring him to meet his eyes.
“Mmmh you better fucking look at me,” Katsuki moaned, eyes hazy with lust as his dripping cock smeared pre-cum between them, “w-want you to see what you fuckin’ do to me. Want you to fuckin’ see your cock wreck me.” Eijirou gasped at the words, slightly hardened hands digging into Katsuki’s ass hard enough to leave bruises as he fucked up into him with everything he had into him, moaning just as loudly.
“Yes!” Katsuki cried out, rocking into each thrust, grinning wildly, manically, “fuck yes! Harder, fuck me! Show me who this ass belongs to!”
Eijirou felt himself move without his permission, twisting to press Katsuki into the cushions of the couch, slamming into him roughly, feeling his end drawing closer as he pinned his lover’s hands over his head. Katsuki’s legs squeezed tight at him, the blond practically screaming as Eijirou pounded into him, fast and rough, watching as Katsuki’s pecs bounced with the force of it, the couch dragging along their floor.
Katsuki came with a silent scream, cum bursting over his abs as he was drilled into the couch, babbling loudly, pulling at Eijirou’s hair and dragging his nails down his couch and squeezing tight around him. Eijirou himself couldn’t last much longer after that, burying his face and teeth into Katsuki’s shoulder as he came hard , moaning loudly as he filled Katsuki up to the brim, cum rushing out to spill over the couch.
After a few, trembling moments he looked back up at Katsuki, panting a little, enjoying the drool on Katsuki’s chin and the fucked out look on his face. “H-Holy shit, babe,” Eijirou moaned, pressing his face between Katsuki’s pecs and laughing. “F-fuck.”
Katsuki just laughed, letting his legs fall open and relaxing back.
“Mmmm it’s hot knowing I’m not the only one who gets jealous,” Katsuki purred, tugging him up to kiss him sweetly.
Eijirou blinked and pulled back, looking at him. “You get jealous?” he asked, giggling a little, “over me?”
Katsuki just looked at him like he was officially the dumbest man on the planet.
“Ten years in and it’s like you don’t even fucking know me.”
Somehow, the both of them laughing about it just...made it all the better.
So, yeah, being jealous wasn’t the manliest emotion.
But it was something they could work on together.