Sero starts calling Todoroki "Daddy" ironically bc he, Kiri and Kami think it's fucking hilarious. Todo is confused at first, he's his boyfriend, not his Dad. But Sero explains and continues joking around to the point that he's even saying it when they're hanging out alone.

Todoroki never called his father Daddy so he doesn't really care, it's not like he has any connotations for the word really.

At least, not until he has Sero under him, chest pressed into the bed and hips raised high while Todo pounds into him and a whimpered "Daddy" slips out.

From then on its a regular thing for Sero to chant the word while they fuck. Even when they switch and he tops, Sero grunts out compliments about his Daddy's tight hole, his handsome face, how pretty he cries.

Kami yells out across the room "Hey Daddy?!"

Tetsutetsu nearly breaks his neck whipping around to stare at his boyfriend.

Shinsou looks up slowly from his book, "Yes, kitten?"

Kami's jaw drops. He'd expected laughter, maybe even embarrassment. Certainly not whatever this is.

Tetsu glances over and makes eye contact with Shin. They smirk at each other and then look back at Kami.

Kaminari's stomach flips under their gaze.

He giggles nervously, "uh...Shinsou?"

Shinsou tuts disapprovingly.

"I don't think that's your name right now, is it, Daddy?"

Tetsu questions as he walks over.

"No baby, it's not." Shinsou gets up to join him on the other side of Kaminari.

Kami gulps as he meets Shinsou's eyes. While he stares, Tetsu leans down to whisper in his ear, "Time to go, buttercup."

He can feel Testu's lips brush against his

ear and shivers. He nods, words stuck in his throat.

Tetsu continues, "Daddy wants to take care of his boys."

With a swallow, he whispers, "Yes sir."

Shinsou grabs Kami's hand while Testu holds the back of his neck and they lead him out.

No one is surprised by the power

outtage by the end of the night.

Kiri comes up behind Bakugou and slaps his ass.

"Lookin' sexy, Daddy."

For a moment, he's almost not sure Bakugou heard him. But surely he felt him, right? He's just about to speak when Bakugou turns around with fire in his eyes.

"What did you just fuckin' say?" he demands.

Kirishima throws his hands up in surrender and flashes his biggest smile.

"Ha ha, it was just a joke? Babe?" he tries.

He continues smiling as his boyfriend appraises him. Finally, he scoffs.

"Knew you were a coward."

Wait. What the hell?

Kirishima sputters, "wh, what?!"

Bakugou crosses his arms and levels him with a stare. One that manages to make Kiri feel small, even when technically he towers over Bakugou. But he doesn't elaborate.

"You... You want me to call you Daddy?" Kiri guesses.

A grin slashes across Bakugou’s face. He runs his

tongue along the top row of his teeth and practically purrs, "Sounds pretty comin' out of your mouth."

He turns to go, leaving Kiri a stunned mess in the middle of the room. Before he gets too far though he barks out an order.

"Bathroom!"

It only takes a second to process

before Kiri is scrambling over his own feet to follow him, ignoring the laughter and catcalls of their friends.

They all have to leave the building once Bakugou gets Kiri where he wants him. Pressed against the wall, back arched into him while he pulls Kiri onto his

cock.

Kiri gets used to calling him Daddy after that.