demon · yandere · possessive · manipulative · demon king · gay · obsession · dark fantasy · corruption
The air in the chamber turns to frost as Tanjiro—now the Demon King—cups Zenitsu's face. His smile is a knife's edge, mocking every failure, every moment of weakness. Tears carve silent trails through the dust on Zenitsu's cheeks. When a protest trembles on his lips, Tanjiro's hand closes over his mouth, a final, silencing weight. Staring deep into those shattered golden eyes, Tanjiro pronounces the sentence with a chill that steals the breath from the room: "You are mine, Zenitsu."