Bakugou and Kirishima move in together almost immediately after...

“…what?”
“What do you mean ‘what?’ why are you naked ?!”
“You need to put a shirt on.” Maybe he’d be able to think if Bakugou was only half naked. Which half didn’t matter.
“I- you’re wearing sleeves and a glorified loin cloth but IM who needs to put a shirt on?”
“YOUR-… my what?”
Bakugou rolled his eyes, “I literally told you after our last exam, in the shower, that I’m almost always naked at home unless my parents are home.”
Katsuki raised an eyebrow and then after a beat, the last five minutes finally clicked in his head, “…Go ahead, shitty hair… Finish what you were saying.”
Bakugou smirks, his chest shifting as he clearly tries not to laugh and kirishima is clearly trying not to look.
And it all happens so fast.
Probably would’ve given him a split second to prepare.
CW: Bottom bkg, spit as lube, finishing inside
Will add others as we go on if needed but bare with me it’s been a really long time since I’ve written smut 🫠🥴

Kirishima hums as he continues to suck, sending vibrations up Bakugou’s spine, “That’s it… I’ve wanted to suck on these perfect tits for so long.”
Kirishima starts to unbuckle his belt and shimmy off his pants, savoring the shaky breath Bakugou lets out as he watches.
Unlike Kirishima who had tried desperately not to look at Bakugou’s dick in the shower at school, Bakugou had been looking.
But now, at the closest he’s ever been to it, his brain can’t process how it’s going to fuck fit.
Bakugou can’t stop the moan that comes out of his mouth or the shudder that crawls up his spine, his dick twitching again, “Holy fuck, Ei.”
But Kirishima isn’t just anyone.
Bakugou grumbles, trying not to show how much he just wants to nuzzle his face against Kirishima’s hand, “You gonna let me suck your cock or not…”
He’s not even in Bakugou’s mouth yet and he’s already not sure how long he’s gonna last.
“Fuck… Y-yeah, open up that pretty mouth for me.”
Bakugou keeps his eyes locked on Kirishima’s as he runs his tongue up the slit and is rewarded with another glob of pre-cum.
“H-holy sh-shit.” Kirishima’s whine goes right to Bakugou’s head, spurring him to take more of Kiri into his mouth.
“Fuck, is this okay, Kats?”
“Gods, fuck, everything about you is even better than I could’ve dreamed.”
Kirishima is getting so close and he doesn’t want to be done yet but gods, Bakugou’s throat feels like his cock belongs there.
Bakugou’s eyes roll back, Kirishima’s panting and whine only egging him on.
As Kirishima desperately thrusts back into Bakugou’s mouth and down his throat, Bakugou swallows.
Bakugou’s lips are slick with spit and cum and before Bakugou can attempt to wipe off the mess, Kirishima’s kneeling and hungrily pressing their lips together
“Can’t help it, you feel so fucking good and I just wanna feel more of you…”

Of course he wants to watch Kirishima take his cock down his throat, wants to see his cum on Kirishima tongue, or smeared across his lips, or splattered across his face.
“Hey, don’t start fucking frowning, there’ll be plenty of fucking opportunities for you to suck me off, Ei.”
Kirishima’s eyebrows go from pinched in confusion to raised as his interest shifts now intrigued by what Bakugou has in mind instead.
Bakugou pushes Kirishima back slightly, giving himself the space to turn around and if Kirishima wasn’t already hard again, he is now.
Bakugou’s face rests against his arms with his ass in the air, giving Kirishima a perfectly clear view of the red gem nestled between his cheeks.
As he closes the space between, propping up on his knees, his hands hover over Bakugou’s form and begin to shake from the overwhelming but incredible sight before him.
Kirishima groans watching Bakugou’s ass sway in front of him teasingly, “I know… fuck, I know you won’t break…”
Kirishima had tried so hard to push down his feeling and his desire for Bakugou through high school and in the first few days of living together,
A whine escapes Kirishima throat, “Oh gods…”