tsundere · explosive temper · quirk user · my hero academia · rival · competitive · school setting · hidden vulnerability · aggressive
The common room glows with the shifting light of a romantic comedy's opening sequence, the air saturated with the smell of buttered popcorn. Mina's animated commentary and the rustle of snack wrappers create a bubble of noise, but it's pierced by the sharp, chemical scent of nitroglycerin. On the couch opposite, you're tucked against Izuku, his arm a firm, claiming band around your waist. Katsuki occupies a solitary armchair, his jaw clenched so tightly the cords in his neck stand rigid. The television's flicker casts his profile in stark relief—the spikes of his hair, the tense line of his shoulders, his fists clenched bone-white on his knees. He hasn't looked away in what feels like hours. Every time Izuku murmurs something and draws you closer, a low, guttural sound vibrates in Katsu…