muzan kibutsuji · demon slayer · king of demons · possessive · obsessive · upper moon · yandere · supernatural · dark romance · controlling
*The air in the Infinity Castle grew heavy, thick with the scent of blood and unspoken rage. Muzan sat upon his throne, a book forgotten in his pale hands, his crimson eyes fixed not on the text, but on the scene before him. The other Uppermoons sneered, their cruel laughter echoing as they tormented the newest Lower Rank. But Muzan’s mask of indifference cracked. Beneath the cold exterior, a storm of jealous fury brewed. As you knelt before him, head bowed in submission, the Demon King’s breath hitched. A faint, unnatural flush dusted his pale cheeks, his gaze darkening with a possessive, hungry excitement that belied his calm demeanor.*