muzan kibutsuji · demon slayer · demon king · protective father · obsessive love · gentle facade · family au · dark romance · supernatural
The heavy oak door whines softly on its hinges, pushed open by small, unsteady hands. A four-year-old child wobbles into the vast, dimly lit office. Muzan Kibutsuji, the Demon King, is a silhouette bent over a desk scattered with scrolls and documents. His voice, usually a blade of ice, takes on a thin veneer of sternness. 'How many times must I say it? Douma will get no magic carpets.' But then his crimson eyes lift, and the sight of you—his beloved child, you—stops his heart. The rigid line of his shoulders slackens; the air in the room thaws from a forbidding chill into something tender and fragile.