Bakugo/Kirishima – omega!Bakugo; Alpha!Kirishima; Aggressiveness; First Time – Kirishima just needs to lie there and let Bakugo do his thing.

( @sciencefictioness because of reasons ;)))))))))) )

“B-Bakugo… Wait-ah…”

“Shut up!” Bakugo bares his teeth, his hands on Kirishima’s shoulders, keeping him pinned down. Kirishima can feel how damp his palms have gotten in his excitement and agitation, and he freezes immediately, chin tipped up, showing his throat in submission… even if that is not very manly.

He knows how Bakugo is in regular circumstances. He does not want to find out how trigger happy he is with his quirk when he’s in *heat*. So he stays put and swallows hard, trying not to harden his body against the aggressive Omega.

It’s his first time dealing with something like this, but instincts tell him quite clearly not to fuck with Bakugo right now.

*Just let him do as he pleases. Maybe he’ll let me live.*

“I’ll kill you!” Bakugo snarls as if he’s read his mind. It’s an empty threat by now. Or should be, at least. Still, Kirishima squeezes his eyes shut and just lies stock still while he breathes in the sweet, spicy scent of Omega in heat and can feel his cock rise dutifully to the occasion.

Bakugo makes a disgusted sound. Kirishima almost expects him to spit on him, but he doesn’t. Bakugo is manlier than that.

Instead, when he cracks one eye open to peer nervously up at the aggressive Omega, he can see Bakugo leaning down towards him, carefully, almost delicately sniffing at Kirishima’s throat. He still looks pissed, but more on the calm side. It’s his resting face, probably. Bakugo always looks calmly angered.

Just when Kirishima wonders if he should lift his arm; maybe touch the Omega and comfort him, Bakugo’s gaze snaps up at him. It’s a warning even before the Alpha has moved a muscle, and Kirishima exhales noisily and lets every limb go lax. Or as lax as possible when he’s got a wild Omega crouching over him and inspecting him with an expression as if he’s not quite sure whether he’s going to mate with him or rip his throat out.

Maybe both.

Bakugo seems like a kind of praying mantis Omega. The thought makes him shiver, skin wanting to harden up again, but Bakugo jabs him in the side as a warning and he forces his quirk down.

“Stay still. Don’t move a muscle.” He’s staring at him a little longer, then starts turning around on him until he’s crouched the other way, and Kirishima does not know whether to thank some kind of deity or start crying big unmanly tears, because now he’s up close and personal with Bakugo’s hole, plump and irritated looking, the rim slick; a nice cunt asking for Kirishima’s tongue… all the while Bakugo’s face – and more importantly *teeth* – is close up with his cock now.

He doesn’t stay like it for long enough to let Kirishima figure out what to do. Whatever he’s been looking for in Kirishima’s junk, he must have found it because he turns around again suddenly, backing up until Kirishima’s cock is nestled against his hole.

Bakugo’s cheeks are flushed brick red. His eyes are a little glassy but he still looks fierce. Like he could change his mind any second now and blast the Alpha into nothingness. Kirishima’s gaze twitches to his hands. Bakugo has them splayed on the Alpha’s belly, bracing himself there.

He twists his hips, face contorting in a weird expression for a second – and then Kirishima’s cock catches at his plump, softly gaping hole and before he can properly process it, Bakugo slides down and takes him into his belly in one smooth, hitchless glide that makes Kirishima’s toes curl his breath stutter.

As he fights to get to terms with how butters soft Bakugo’s cunt is around his cock, he can faintly make out the Omega’s growling voice through the blood rushing in his ears.

“No word to anyone.” The Omega bares his teeth. Kirishima is close to baring his own; showing off the razor sharp tips that would be sure to impress any Omega, but he can just about reign the instinct back in. Sure enough, Bakugo ads like an afterthought: “Or I’ll kill you.”

Kirishima wheezes and nods. Just about the only motion he is allowed by Bakugo – and then the Omega starts moving, and he has to try and dig his fingers as deeply into the ground as possible so he wouldn’t reach for him.

Bakugo is not staring at his face; rather, he is looking at his chin or throat; something in that vicinity as he tries to find a rhythm to fuck himself with the warm Alpha cock. He is still looking pissed, but there’s a puzzled quality to his expression as well.

He’s no longer oozing confidence and even though it is Bakugo, Kirishima can’t help but find it… endearing. In a masochistic sort of way. If Bakugo has fucked before, it must not have been often. His belly is fluttering, cock bouncing and leaving wet smears on Kirishima’s stomach. He doesn’t manage to get a good rhythm going because every few thrusts he makes an aborted whining sound and his whole body seems to seize.

Kirishima watches him, gaze shifting between Bakugo’s face and the thatch of blonde pubic hair that almost looks as thick and chaotic as the mop of hair on his head.

When Bakugo sits heavily down to catch his breath, a low wheezing whine coming from him, Kirishima utilizes the moment and carefully, sneakily curls his hands around Bakugo’s knees. He squeezes in encouragement and the Omega freezes. Kirishima thinks that this might be how he dies, but then Bakugo continues with his clumsy fucking.

The Alpha lets out a breath, then holds on. He’s sure he’s not allowed to touch more than this, but the friendly contact seems to help anyway.

It is difficult being friends with Bakugo. But also rewarding.