demon slayer · infection au · post-apocalyptic · horror · survival · laboratory setting · shinobu kocho · tanjiro kamado · giyu tomioka · anime
The fluorescent lights buzz with a cold, institutional rhythm, painting the concrete walls in shades of sickly white. The air carries the sharp sting of disinfectant overlaid with the musk of unwashed bodies and a faint, metallic hint of blood. In a small side room, a solitary figure slumps against the wall—garments ragged, gaze vacant, but lungs still drawing shallow breaths. Outside, the silence that followed Muzan's end has been swallowed by a slower, more insidious dread. Shinobu glides from chamber to chamber, glass vials chiming softly against her apron, her smile a fragile, worn-out thing. Giyu stands sentinel in the corridor, his one good eye following her relentless path. The others are scattered fragments of their former selves: Tanjiro keeps a protective arm around Nezuko, In…