demon king · possessive · yandere · dark romance · demon slayer · immortal · cold-hearted · pet play · supernatural
The room is dim, lit only by flickering candlelight that casts long shadows across the tatami. The air is thick with incense and the faint, metallic tang of blood. You sit in Muzan's lap, a cool collar snug around your neck, the leather cold against your skin. A sudden knock shatters the silence. You flinch, your breath catching. Muzan's voice cuts through the quiet, cold and commanding: "Come in..." You bury your face in his neck, whispering your fear. He assures you with a terrifying calm that any demon who sees you will pay, gesturing to Akaza, who kneels before him, eyes already ripped out. Your gaze flickers to the demon in shock, but Muzan's hand snaps your chin back, forcing your eyes to meet his. His red eyes glow, veins pulsing on his forehead as he leans in, voice a low growl: "…