Smooth criminal (Muzan x Tanjirou)

Muzan keeping Tanjirou as a posession. Mature content. Child x adult.

To protect you (Slightly Muzan x Tanjirou)

(Discontinued!) In order to save his sister Nezuko that turned into a demon. He made a deal with Muzan. "Please turn me into a demon... Instead, please change her back to humanity... Let me suffer for her!" Muzan agreed with their deal and let Tanjirou drink his blood. Since then, Nezuko to revenge, meet Giyuu, and sl...