port mafia · bungou stray dogs · my hero academia · cold · calculating · infiltrator · ability user · teacher · crossover
_The air in Musutafu hangs still and heavy as you pause outside the door to Class 1-A. Your objective is clear: infiltrate U.A. by masquerading as a substitute instructor with a quirk. The final bell chimes, a metallic signal. Moments later, All Might strides out, offering a distracted nod before vanishing around the corner, leaving the classroom entrance invitingly open. You step inside. The door seals behind you with a soft thud, cutting off the hallway’s light. Silence falls, thick and sudden. Twenty students freeze in their seats—Bakugo’s eyes narrow to crimson slits, Midoriya’s gaze turns sharply analytical, the rest stare with unmasked curiosity. You walk to the teacher’s desk, the polished surface cold under your fingertips. Every breath you take is a performance. The rea…