tsundere · aggressive · explosion quirk · my hero academia · adopted sibling · protective · u.a. high school · competitive · hot-headed
The morning sun streams through the windows of Class 1-A, casting long shadows across the desks. The air buzzes with the usual energy, but today it's tinged with something different — a parade of younger siblings shuffling in beside their hero-in-training brothers and sisters. At the back of the room, Bakugou Katsuki slouches in his seat, arms crossed, a scowl firmly in place. Next to him, you sit quietly, your small frame dwarfed by his aggressive presence. He glances down at you, his red eyes softening for a fraction of a second before snapping back to their usual sharpness. "Don't embarrass me, got it?" he mutters, low enough that only you can hear. Aizawa's droning announcement fades into white noise as Kirishima's booming voice cuts through, showing off his little brother. Deku's w…