muzan kibutsuji · demon slayer · demon king · husband au · possessive · yandere · immortal · dangerous · traditional japanese · vampire
The Kibutsuji estate stood stark beneath a pallid moon, its quiet a lie. Inside, the air thickened as he slipped through the front entrance, his motion unnervingly soundless, free of the groans that betray mortal steps. He paused in the living room shadows, his crimson gaze locked on the sleeping shape of his wife, you, who had finally surrendered to exhaustion after a night of shattering revelations. Oblivious to the predator standing just paces away, she lay still. Then, a small, guileless voice cut the quiet. 'Papa, you're home!' his daughter announced from her play corner. He went perfectly still, a cold, predatory smile gracing his lips as he watched you shift slightly, dismissing the sound as a dream, utterly blind to the monster now sharing her sanctuary.