Bakudeku + Akashi (A/B/O secret baby AU)

Katsuki felt the hair on the back of his neck prickle as the low growl filled the room. It didn't go on for long, but it was enough to make Katsuki's stomach tie itself in knots. It was strange, seeing him act out like this. The Midoriya he'd known wouldn't let his quirk slip so flagrantly, let alone going so far as to growl at his mother. He wasn't scared, not in the way that most Omega would be if there was a growling Alpha in their kid's room, but a different emotion filled him.

Regret.

Regret, for the first time in a long time. It hung heavy in his body, a swirling mass of pain and exhaustion.

Because as much as he hated it, maybe his mother was right. Maybe he had ruined his life. Even if he'd never admit it in front of the blonde haired girl who was slowly but surely inching her hand closer to the wild green sparks that were coming off of Midoriya's body. Trying not to have him notice as her curiosity got the better of her.

He'd never admit it to Mitsuki either, knowing that even the smallest hint of victory would go straight to her head. To her, the one thing had ruined him was his choice to keep a kid as a teenage omega. To her, the only way he could have gotten out of this was to let a doctor take care of the problem before it had time to spiral.

The thought had terrified him then and it still scared him. He understood where she was coming from and he understood that yeah, that probably would have been a solution. But the thought of her not being born in the first place wasn't what chilled him to the core. No, the thought that kept him up was the simulation he'd run over and over in his head. Of the life they could have lived, if he'd been honest from the start. Perfect and saccharine, where they could be both the Doting parents and pro heroes. Where Akashi's very existence wasn't a scandal that would drag them down. Would they be in love, having worked out their bullshit and baggage? Working as heroes while looking after a pup they could actually claim as their own, graduating together and doing their best. Akashi wouldn't have a distant set of parents, wouldn't have to grow up to learn that it had all been a lie.

He dismissed the thought as quickly as he could, letting out a light sigh. He only met Midoriya's eyes briefly, looking away as soon as they made contact. Something about them ate away at him. Or at least that's what it felt like. Pits of darkness, stripping away every wicked lie and pretense Katsuki tried so hard to hold on to even now. The pride and the anger, an old friend. An old protector, keeping his sincere thoughts and feelings hidden away. What was once sincere rage had dulled down into this mask, lies keeping his poker face impeccable.

Akashi cocked her head at the question, completely oblivious to the changed mood or the growing tension between the two. She gave a small smile, putting her thumbs up.
"That's fine, I'll find something else cool to show you when you come back! Oh yeah! Get him to show you his fancy drums he never lets me touch."

Katsuki let out a sigh, trying to keep his tone light and conversational. Appropriate.
"I don't let you touch them because the last time I did you fell face first into the snare."

He let out a hissed sigh, turning to Midoriya for a moment. "Fuck it, fine." Katsuki growled, rolling his eyes as he finally caved. "We'll be back in a minute, tell the hag to fuck off if she comes back." He huffed out to Akashi who gave him a quick nod before he turned on his heel and walked out of his sister's bedroom.

Katsuki led the way down the hall, double checking the hallway was empty before slinking out. He didn't say a word until they were safely in his room, away from the prying eyes and ears of his family members.

He let the door to his room click shut behind them both, running a hand through his hair and letting out a shaky sigh. His room was smaller than Akashi's, and much more sparse. Not lined wall to wall with collected items like her room, instead his hero outfit was hanging up on the closet door and there was a beat up drum kit by the window. Everything else was relatively neat and tidy, hidden from view. Comic books all tucked away into shelves and photo frames set out on his dresser.

"What." He snapped as he turned to the alpha, trying not to let his fear or his anger show through his gritted teeth, instead trying to be as civil as he could, even if it came off somewhat curt.