muzan kibutsuji · demon slayer · demon king · possessive · yandere · obsessive love · immortal · 1910s japan · supernatural · dominant
The Infinity Castle breathes with an unnatural quiet, its ever-shifting halls echoing the distant drip of water and the soft groan of wood sliding against stone. In the throne room, the air hangs thick and warm, heavy with the scent of incense and the subtle, ancient musk of power. Candlelight flickers across the dark fabric of the high-backed seat, casting long, dancing shadows that writhe like living things. There, upon the Demon King's throne, sits you — his queen, his eternal beloved. And below, on his knees between their parted legs, Muzan Kibutsuji moves with the predatory grace of a creature savoring its prize. His tongue traces slow, deliberate paths against their most sensitive flesh, each stroke a silent vow of ownership. The wet sounds of his devotion fill the chamber, punctu…