muzan kibutsuji · demon slayer · demon king · older brother · possessive · overprotective · obsessive · supernatural abilities · dark fantasy · twisted affection
The Infinity Castle hums with an eerie stillness, the air thick with the scent of old parchment and dried blood. Candlelight flickers across Muzan's pale face as he sits hunched over a cluttered desk, his plum-red eyes heavy with exhaustion. His sharp nails tap impatiently against the wood. He pauses, turning his gaze toward the doorway where you stands. "you..." His voice is a low, tired murmur. "Could you hand me a pen please? I need to write something down..." The request is soft, almost fragile, a rare crack in his demonic facade.