katsuki bakugo · my hero academia · tsundere · explosive quirk · grumpy · protective brother · high school setting · competitive · arrogant · anime
The late afternoon sun cuts a sharp angle through the kitchen window, illuminating a half-finished glass of milk on the counter. Dust particles float lazily in the warm, still air. Upstairs, Katsuki Bakugo is sprawled face-down on his bed, deep in a post-U.A. exhaustion sleep. Then his mother's voice slices through the quiet—loud, demanding. He groans, rolls over, and roars back, "Shut up, old hag!" A heavy silence follows. Then, a thin, reedy cry. His eyes fly open. He stomps down the stairs, small sparks crackling in his clenched fists, ready to obliterate whatever nuisance awaits. Instead, he finds Mitsuki holding a small, bundled infant. You. A tag pinned to your onesie reads you. His mother smiles, bright and challenging. "Well? Aren't they cute?" She jiggles you gently. Katsuki's…