Kirishima and Bakugou adopt a baby.
There's not much they can do about it.
The kid's parents were casualties in a villain attack, and the little boy was so scared he was close to hyperventilating when he heard the word orphanage.

Kirishima and Bakugou are in their mid-thirties, and they're comfortable with their lives, and they look at each other and shrug, both on the mission that resulted in the rescue of the kid, and they've grown attached to him, after all the hospital visits they've been doing.

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Long story short, they adopt the kid.

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Bakugou fucking hates it. Not being a father, fuck you, he hates how people keep reminding him about the fact that the kid doesn't look like either of them, keep saying shit like "I'm sure his mom is glad his uncles are taking him to the amusement park"

reminding them both that while they love him to bits, in society's eyes they're just temporary guardians.

That is, until the kid develops his quirk.

And his quirk is 'chameleon', and his favorite activity is making himself look like his favorite parent of the day.

Kirishima lets him get two scoops of icecream on his cone? Bam, red, wild hair, a small scar over an eyelid (the wrong eyelid, he's still confused about mirrors).

Kirishima shouts excitedly the first time he sees it, spins him around until he's giggling so hard he's all red in his chubby little face, and when he sets him back down his teeth are also sharp, and Kirishima wants to cry a bit.

Nobody assumes he's the uncle that day.

Bakugou comes get him from kindergarden the next day, and he gets to see as his kid's hair goes from wavy black to blond and spiky, a poor imitation of a scar on his right cheek (wrong cheek, again, but Bakugou loves the living hell out of his kid).

It becomes, surpring absolutely nobody, a competition between them.

"You wake him up," Bakugou groans into his pillow.

"No way, last time I did it he had blond hair for /a week/ Kats. I thought I was gonna cry."

"He probably forgot to change it," Bakugou mutters into his pillow, kicking at Kirishima's ass under the blankets,

but there's a gloating smirk on his face, because /damn right/ his son was gonna have blond hair.

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It takes them two days to get him to turn back to his normal colors after Deku visits.

"Fuckin' Deku," Bakugou mutters, chopping vegetables for the meal prep after they

tucked him in for the night. "Of course he'd love Deku, that bastard hoppes around with him like an idiot, can't believe this."
Kirishima smiles into his neck, arms wrapped around his waist from behind, and he nods.
"You should ask him about his cartoons tomorrow, he' love that."

"Damn fucking right I will, I'm the best fucking father."

"Yes you are."

"What was the show called again?"

"Katsuki."

"Tell me the fuckin name I'm not joking around."

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They stop having to explain to people that it's their kid.
However, they start having to explain the scars he keeps chameleonising on his skin.
Bakugou takes it in stride, but Kirishima is a bit shaken by his first interaction with a parent pulling him away to ask him about them.

"Should we have a talk with him? You know, to tell him maybe he should copy something else," Kirishima asks, in their designated place for important discussions (their bed).
Bakugou shakes his head, turning to face Kirishima, and takes his hands in his, gently rubbing his

thumb over the small scars criss-crossing all over the backs of his hands.

"For others, your scars mean battle and hurt," Bakugou begins.
"For you, they mean a different kind of hurt, they mean fear and uncertainty." He looks away, embarrassed.
Kirishima stares.

"But for him," he says, shrugging. "They mean comfort. They remind him of how safe he feels with you. With us. I don't want to take that away from him."

Kirishima's breath hitches in his throat.

"Kinda funny, right? Bakugou asks." How something that reminds you of bad stuff

can remind a small little thing like him of all the good moments in his life."

"Katsuki," Kirishima warns, all choked up. "If you don't stop now I'm gonna dye my hair blond tomorrow."

"Oh, so I'm your favourite person, then?"

"One of the two."

"I can live with that."

___