KiriBaku AU

Dirty Talk Time

For the next few days they fucked like animals, Bakugou had been bent over all his own surfaces by a very horny Kirishima.

They would fuck, sleep, wake up and do it again.

The rare moments they calmed down enough to regain their braincells, Bakugou would get water and food for them from his fridge.

His legs were weak, his ass destroyed and stretched and he was tired.

Kirishima would wake up in the middle of the night, spreading Bakugou's legs and fucking him while the blonde was half asleep.

Katsuki let him, he was too tired to move much so he told Kirishima he could.

But just as Todoroki predicted, eventually he had to engage more.

Recently Kirishima was taking longer to finish, spending an hour or so slamming his cocks into the whining Bakugou until he finally came.

This was exhausting for the both of them, having sex was more of a chore to stop their hormones from building up rather then an enjoyable experience.

Current time:

They had been at it for over an hour now, Kirishima was whining and speeding up, desperate to finish.

Bakugou was sprawled out on the bed beneath him, his cock was weakly still standing up, his chest painted with his  own cum from several orgasms already.

His body was oversensitive and half numb at this point.

The redhead above him was ruthlessly splitting him open on his cocks, face scrunched up and needing.

They were breathing heavy, Bakugou's eyes were closed, his mind screaming at him to do something, they couldn't keep going like this.

The blonde could get hurt in some way or worse-

So he thought back to what Todoroki said about dirty talk and engaging more.

He didn't really know what turned the Merman on, only that he was pretty vocal during sex and had massive cocks.

Fuck. He was so fucking tired.

Mostly embarrassed too, he'd never talked dirty before.

Never had to really, he was only ever on his own during his heats, but now he had Kirishima and he would be damned if he didn't give 100%.

He would be the best fucking rut partner there ever was.

Meanwhile, Kirishima's hips were slowing, his enthusiasm leaving him and being replaced with tiredness, muscle ache and a primal need to cum.

He wasn't weak, just upset that he was taking so long. In his mind he was failing his Katsuki and wasn't doing a good job for him.

This just discouraged him more, his mind clearing up as he slowed down, thoughts just kept flying in his head.

He was deep in thought, his thrusts slower when he heard a low voice come from under him.

"K-kirishima."

The Merman looked down and tilted his head to Bakugou, he hadn't really heard him talk much, just swear and groan.

Katsuki flushed a bright red, locking eyes with the redhead and mentally slapping himself.

Like fuck he was going to turn back now.

"don't... Don't stop-"

The Merman's ears perked up, was Katsuki begging?

His cock twitched inside of Bakugou,
oh... Kirishima liked this side of his Katsuki.

"s-so good.." Bakugou was panting under him.

Kirishima picked up his pace again, angling his cocks to Katsuki's bundle of nerves inside him, he was hitting it slowly and dragging his cocks in and out.

"Here?" Eijirou chirped, grinding on Bakugou's prostate for emphasis.

"F-fuck Ei... There. Right fucking there-"

The Merman was watching Bakugou's reactions as he sped up, trying to hit that spot his Katsuki liked so much.

He realised he hadn't properly payed attention to his mates reactions, so now he drew his eyes all over the blondes face.

His expression was completely blissed out, mouth open and sweat dripping down his forehead.

"so... Big-"

Kirishima liked that, he quickened his pace again, finally starting to feel a build up.

"Kat- suki... Like this?" Kirishima experimented by lifting a hand to play with Bakugou's nipples, all the while speeding up his thrusts and watching the blondes reactions.

Bakugou was too tired to hold back his expressions, he panted and whined, his eyes rolling back in his head with how fast and hard Kirishima was being.

"yeS- ah....harder- Eijrou-"

The Merman finally went back to his brutal pace, bucking his hips wildly and slamming his other hand back to Bakugou's hip, holding him up and feeling the familiar feel of his build up.

"Ei- I'm... I'm cu-"

He cut himself off with a scream as hot white ropes of cum squirted on his chest, the sight of it made Kirishima gasp and slam into Bakugou, finally cumming with a loud cry.

The Mermans arms gave out and he flopped ontop of Katsuki, catching his breath.

...

The last few days went by with them learning eachother love language, Bakugou talked dirty more often with Kirishima and it made things easier for them both.

Bakugou got more time to get food and water or sleep if Kirishima and him didn't take too long.

Kirishima tried other things to please his mate.

He'd found out that the blonde liked his hair being pulled during sex and had developed a obsession with Bakugou's nipples, he played with them, licked and bit them till the blonde was begging and moaning beneath him.

Aizawa had slipped a note under their door at some point, Bakugou had to crawl to the door and read while being pounded by Kirishima from behind.

It made it pretty fucking difficult to read what his boss had wrote when he had a dick in his ass most of the time.

Turns out Aizawa had excused him from 2 weeks work so he would have the week to fuck and an extra one for resting and such.

Boy was he going to fucking need to rest.

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Okay so it's pretty late rn and im sorry its kind of a short chapter but I'm tired so I might edit this later.