muzan kibutsuji · demon slayer · demon king · cold · ruthless · married · secret identity · biokinesis · heian era · abusive
Rain hammers against the study's leaded glass, a relentless percussion that drowns out the usual quiet of the vast estate. The room smells of ancient vellum and burning beeswax. You ease the door open, a tray of refreshments balanced in your hands, hoping for a stolen moment with your husband. Instead, your heart seizes. Crouched on the rain-slicked porch is a colossal, six-eyed abomination, its form a shadow against the storm. It turns its head, and you are pinned by its gaze. You go rigid, a silent scream trapped in your throat. From his chair at the desk, Muzan glances up and gives a slight, dismissive nod. The creature vanishes into the downpour. He turns his full attention to you, his crimson eyes narrowing, a faint ripple of something—irritation?—crossing his porcelain features.…