Bakugou's and Kirishima's first time was... unique - to say the least.

"Ow! Can you not rip my entire ass open?" Kirishima cringed as Bakugou attempted to add another finger, fisting the sheets beneath him. He was on his hands and knees, stiff and awkward as Bakugou knelt behind him, snapping at his complaints.

"Stop fucking tensing then, idiot!" Bakugou replied loudly, dripping more lube on his fingers.

"Tch. My sheets are ruined because of you." Bakugou grumbled after, slightly unnerved by the liquid running down the other's thighs onto his bed.

"I said we could do it my ro- ack!" Kirishima yelped, another knuckle slipping past his rim. He began to feel a little warmer, a strange feeling seeping past the pain. It didn't really feel pleasurable, yet it was making his heart beat far too quickly.

"No, this room."

Bakugou didn't need to explain.

He focused on slowly sinking his three fingers further inside, the tight warmth unhelpfully tempting to his tight pants. He genuinely didn't want to hurt Kirishima - but he wasn't known for the best patience.

"He's in his room right now." Kirishima taunted, looking over his shoulder.

It had been a while since they established their infatuation with Todoroki Shouto. They'd somehow managed to become a lot closer. They all spent a surprising amount of time together now.

Bakugou curled his fingers, jabbing a weak spot. He smirked as Kirishima's teasing grin dropped, choking out a shocked moan. A small part of him hoped Todoroki heard.

"Fuck there - again - Kats-" The sinful words hissed out of the red head's clenched jaw, mindful of his volume. Most of their classmates were in the common room a few floors below them. Iida had ordered everyone to have a group study session to get ready for their final exams.

But Bakugou doesn't get ordered around.

Todoroki doesn't either.

And Kirishima was just there for the ride.

(Literally...)

"Don't call me that." Bakugou growled, harshly slapping Kirishima's thigh as the other tried to crawl back into Bakugou's space.

"Ngah!"

He paused at the sudden moan.

His fingers hadn't been moving.

"Did you ju-"

"No! I didn't! I'm not- I'm not into that!?" Kirishima squealed, instantly scrambling away in embarrassment.

"Don't- fuck- Don't run idiot! You're still-" Bakugou yanked the others ankle, trying to keep him in place.

With Kirishima's stuggling, he'd managed to slip one hand off the bed - thrown off balance.

"Shit!" He yelled, diving head first off the bed.

Bakugou, who was still somewhat 'attached' panicked, reaching out to grab the other by the waist.

"You fuck-!" Bakugou winced as he fingers slipped out - knowing it hurt.

The both of them managed to fully fall of the bed, landing in a loud heap of limbs. Kirishima groaned in pain, dramatically spread over the hard wood floor like he'd fallen off a building.

"Oi! Get off!" Bakugou shouted, even though he was the one on top. He almost winded the other as he shoved himself off.

...

"Dude, I think my ass broke."

"Show me."

"What?!"

"Show me, idiot."

"Dude-"

"I literally had my fingers up there 2 seconds ago - I've been staring at it for-"

"Okay! Okay!"

Kirishima's ass was not broken.

Even though the mood wasn't quite the same, the two made their way back onto the bed. Somehow the chaotic fall hadn't softened his raging hard on.

He was only slightly surprised it hadn't effected Kirishima's either.

"It'll be better if you're on top, so you can control how much goes in," Bakugou instructed, who'd definitely not thoroughly planned for the moment.

Note: Delete 'How to have dick in ass sex' off history.

"Okay - um..." Kirishima straddled over the blonde, high enough so his ass barely brushed over Bakugou's dick.

"Slowly."

The blonde practically whimpered as his tip slipped in. It was warm and unfairly tight. His toes curled and his teeth clenched shut. Carefully, he observed the other's reaction - ready to call the whole thing off if Kirishima was uncomfortable.

"Haaah..." The red head puffed out a sigh, thighs lightly shaking as he slowly sunk down. They were both fully naked. They didn't do that very often. Kirishima was always a little insecure about his body. Bakugou knew almost immediately at the first time he pulled the other's boxers down.

He scowled at the way Kirishima had snapped his thighs closed back then, shy about his body. If only the other could see how pretty his dick looked now, hard and blushed red on the blonde's abdomen. He couldn't help but reach to wrap it in his fist, grinning at the gasp he got in return.

His smile was wiped off his face though, as a sudden increased tightness brought him embarrassingly close.

"Shit..." Bakugou whispered, realising how much he was done for. Could he even last?

They both froze at the sound.

"Who the fuck is it? I'm sleeping!" Bakugou called out, tense.

"Bakugou, I heard banging."

Oh no.

Bakugou winced at the way Kirishima suddenly clenched around him again - recognising the voice too.

"Fuck off, IcyHo-ngh!" Bakugou bit his tongue as the red head fidgeted, unknowingly teasing his dick.

"St-stop it - you little fucking shit." Bakugou hissed, trembling hands gripping onto Kirishima's thighs. He could feel the muscles tense and strain with every movement. The other quietly whimpered in response, nervously flicking his eyes to the door.

"Bakugou?" Todoroki resumed, blissfully ignorant of what was happening the other side of the door.

"What?! I'm trying - I'm trying to..." Bakugou clenched his eyes shut, attempting to ignore the tightness around his cock. He was thankful Kirishima was rather heavy, or his hips would be jerking.

"Are you okay? Should I come-"

"NO!" Bakugou screeched, snapping his grip to Kirishima's hips. He seriously couldn't live with himself if Todoroki saw them right now. Obviously he fantasied about Todoroki deciding to join in -

"Were you going to... hah - throw me off?" Kirishima whispered, offended by Bakugou's quick hand placement. He was blushing profusely, just as anxious and ridiculously turned on as the blonde.

"Shut up!"

"I wasn't talking."

"Fuck!" Bakugou internally screamed at the way his voice broke at the syllable. Kirishima had started carefully bobbing, biting his lips raw to be quiet. The blonde practically sobbed at the overpowering pleasure - tears of frustration pricking at his eyes.

If he spoke another word - Todoroki would hear his pathetic whines - both pleading Kirishima to stop whilst edging him on to selfishly chase his high.

"Bakugou, should I get Kirishima?"

The red head let out a muffled moan at the mention of his name. Bakugou didn't blame him, Todoroki's low tone was achingly arousing.

"No! Fuck off!" He hated the way his shout came out unhelpfully breathy. It lacked the usual harshness - mind fogged with pleasure.

"... Okay. Let's talk about this later." Todoroki's voice sounded a little tense.

Did he know?

Was he disgusted?

What if Bakugou let him hear his moans?

Would he...

"He's... gone." Kirishima choked out, looking almost disappointed.

Bakugou couldn't help but twin that feeling.

However, that feeling quickly shrivelled under the rising wave of rage.

"You fucking did this on purpose." Bakugou growled, raising his knees so his feet pressed flat on the bed.

"What? Can't I tease you a little?" The other grinned, unknowing of the blonde's movement.

"What the fuck am I supposed to tell him later, idiot?" He flexed his thighs experimentally, tightnening his grip on the others hipbones.

"Maybe that you were busy fu- FUCK!"

Bakugou began to thrust upwards with no mercy - rapidly overwhelming the man on top, who was forcefully bounced until he was almost crying.

"I can't- I can't- Ngah! Katsu-" Kirishima babbled, falling forwards onto the other's chest.

"I said don't fucking call me that." Bakugou snapped reflexively, slamming his hand down onto the other's skin.

The noise Kirishima made in return was a good enough apology.