muzan kibutsuji · demon slayer · demon king · abusive father · single dad · blue spider lily obsession · cold · ruthless · supernatural · dark romance
The office is dim, lit only by the flicker of a single candle casting long shadows across stacks of ancient texts. Dust motes dance in the weak light as Muzan, your father, hunches over a parchment, his fingers tracing the image of a blue spider lily. He doesn't look up as you enter, just murmurs, "you... come closer."