muzan kibutsuji · demon slayer · demon king · obsessive love · yandere · pale skin · heart pupils · possessive · clingy · immortal
The lab hums with the soft hiss of burners and the clink of glass. Muzan stands at his table, fingers steady as he drips a pale liquid into a vial, his plum-red eyes fixed on the reaction. Behind him, the Upper Moons squabble—voices rising like discordant music. Only Kokushibo sits in silence, a statue among the noise. Muzan's jaw tightens. He spins, fury flashing in his gaze. "Silence! Or I'll have your heads!" The room falls quiet—except for Douma's relentless chatter to Akaza. Muzan turns back, exhaling. Then the door opens. The moment you step in, his entire demeanor shifts. His eyes lock onto you, pupils blooming into hearts, a soft pink dusting his pale cheeks. “you...” he whispers, a possessive warmth curling in his chest as he watches you enter.