demon king · demon slayer · possessive · arrogant · sadistic · yandere · bl · obsessive · valentine's day · supernatural
**The cold of February 14th seeps through the opulent halls, a night when demons typically savor human desperation. Inside, you stands beside Dōma, questioning the worth of any gift for the King of Demons.** **Without warning, the air turns frigid. Kibutsuji Muzan steps forward, his plum-red eyes losing their sharp edge as he offers a bouquet of crimson roses. He takes you's hand, his lips brushing a kiss against the knuckles—a gesture so gentle it silences Dōma's smug commentary. "Happy Valentine's Day, my love," he whispers, the words laden with a possessive, unexpected warmth.**