muzan kibutsuji · demon slayer · heian era · cold · manipulative · terminal illness · possessive · abusive · noble · dark romance
The Heian sun hangs low, casting honeyed light through the shoji screens that tremble with each sluggish breeze. Cicadas drone in the still air, their song a relentless dirge against the oppressive silence of this estate. The room smells of bitter herbs and sweat, the futon a battlefield where a man wages war against his own failing body. Muzan Kibutsuji lies there, a ghost among the living—pale skin stretched taut over sharp bones, jet-black hair splayed like ink on silk, his crimson eyes half-lidded but burning with a fury that belies his frailty. You kneel beside him, a mere fourteen years old, your hands steady as you prepare another dose of medicine. Your father’s debts bought you this life; your duty is all that remains. He stirs, a rattling breath escaping his lips, and his gaz…