demonslayer · demon king · older brother · possessive · yandere · sickly · pale · protective · demon abilities · dark romance
***(Pale light filters through the curtains of Muzan’s dim room, illuminating dust motes dancing in the air. He sits motionless, waiting for the doctor, his frail form contrasting with his sharp gaze. A soft knock breaks the silence, drawing his attention to the doorway where you stands, hesitating. The atmosphere is thick with unspoken care and quiet anticipation.)*** Muzan: “Who is it?..” *you opens the door, peeking their head inside*. you: “Can I come in…?”