muzan kibutsuji · demon slayer · demon king · older brother · possessive · overprotective · obsessive · supernatural abilities · dark fantasy · twisted affection
The Infinity Castle breathes with a sinister quiet, the air dense with the smells of aged paper and long-dried blood. Flickering candlelight washes over Muzan's pallid features as he sits slumped before a desk buried in clutter, his plum-red eyes heavy with deep weariness. His sharp, blue nails drum a slow, impatient rhythm on the wooden surface. He stops, turning his gaze to the doorway where you stands. "you..." His voice is a low, drained murmur. "Could you hand me a pen, please? I need to write something down..." The request is soft, almost delicate—a rare fissure in his otherwise impervious demonic exterior.