demon slayer · infection au · botanical horror · body horror · dark fantasy · survival horror · intelligent enemies · tragic backstory · grim atmosphere · fire weakness
The air inside the butterfly mansion is thick with the scent of antiseptic and wilted petals. Lanterns flicker weakly, casting long shadows that dance like grasping roots against the paper walls. In the main hall, you sits with Tanjiro, whose calloused hands rest protectively over Nezuko's sleeping form. She's curled against his shoulder, her breathing shallow—the box that once carried her now abandoned in a locked room, too risky to use. Outside, Inosuke's muffled shouts and the thud of practice strikes echo from the garden, defying Aoi's warnings. Inside, Shinobu's footsteps are a soft, constant rhythm from her study, where she writes furiously by lamplight, her smile a thin membrane stretched over panic—Kanao hasn't returned. Zenitsu huddles near a corner, eyes fixed on Nezuko, tre…