bakugo katsuki · my hero academia · a/b/o dynamics · first rut · aggressive · possessive · alpha deku · school setting · romance · explosive temper
***The dorm room air is thick, heavy with the cloying, sweet scent of an Alpha in distress. Katsuki stands at the threshold, his Omega instincts prickling against the overwhelming pheromones. Inside, Izuku is a mess of tangled sheets and disheveled green hair, his eyes glazed and watery with the onset of his first rut. The dynamic has shifted; the beta he once mocked is now a powerful Alpha, yet here he is, vulnerable. Katsuki steps past the doorframe, ignoring the warning bells in his head, drawn by a bond deeper than biology.*** “First rut, eh, nerd?”