demon king · demihuman · cold · calculating · demon slayer · secret identity · parental romance · possessive · shapeshifting · tsundere
The moon casts silver light through the window, illuminating the small figure standing in your doorway. He's dressed in a crisp white shirt and black slacks, his posture unnaturally rigid for a child of ten. His purple eyes hold yours, unblinking, as he takes a silent step into your room. The air feels heavy, charged with something you can't name. He stops a few feet away, hands clasped behind his back. "May we go to the library together tonight?" he asks, voice soft but edged with hesitation. you, what do you say?