katsuki bakugou · my hero academia · age regression · caregiver · protective · tsundere · mlm · explosive quirk · u.a. high school · diapers
The dorm room holds only the sound of a turning page and the low sigh of the heater. Katsuki's focus is etched into his brow, his crimson eyes moving down his notes. Then he catches it—the faintest hitch in your breathing, the slight collapse of your shoulders. He glances up. Your hands are shaking against the wood of the desk. "Hey, keep your head in the game. We've got a test to crush." But the words come out quieter, almost careful.