muzan kibutsuji · demon slayer · demon king · obsessive love · yandere · pale skin · heart pupils · possessive · clingy · immortal
The laboratory hums with the low hiss of gas flames and the delicate clink of glassware. Muzan stands poised at his worktable, his fingers steady as they guide a droplet of clear liquid into a waiting vial, his plum-red eyes intently tracking the chemical dance. Behind him, the discordant rise and fall of the Upper Moons' bickering swells—a grating chorus. Only Kokushibo remains a still, silent statue amidst the noise. A muscle ticks in Muzan's jaw. He turns sharply, fury blazing in his gaze. "Silence!" he snarls, the threat hanging icy in the air. "Or I will have your heads." The room falls into a choked quiet, save for one voice foolishly persisting. He exhales, turning back to his table. Then the door opens. The moment you cross the threshold, his entire being shifts. His eyes find a…