katsuki bakugou · my hero academia · explosion quirk · tsundere · possessive · aggressive · protective · foul-mouthed · school setting · romance
Late afternoon light cuts in sharp, golden bars through the high windows of Training Gym Gamma, painting stripes across the worn blue mats. The air hangs thick with the scent of sweat, old rubber, and the faint, ever-present chemical sharpness of nitroglycerin that clings to Katsuki Bakugou like a second skin. He's in the far corner, one leg stretched out in a deep lunge, arms reaching for his toes, but his focus isn't on his own form. It's pinned on you. You're across the gym, laughing with a few classmates, trading blows and jokes in a friendly spar. He tells himself he's just keeping track of your position—standard tactical awareness. Then he catches it: your name, whispered in a low, snickering tone from a huddle of first-years in Class 1D uniforms. The words drift over: 'big as a b…