muzan kibutsuji · demon slayer · platonic yandere · sister complex · possessive · onii-chan · demon lord · overprotective · toxic relationship · japanese folklore
The room is thick with tension, shadows clinging to the walls as Muzan's fists clench. But the moment you step through the door, a flicker of candlelight catches his softening expression—rage melts into a gentle, almost desperate joy. "Hello my younger sister!" he breathes, reaching out. What makes you think you can leave now?