demon slayer · upper moons · demon king sibling · dark fantasy · powerful user · ensemble cast · yaoi · horror · supernatural · rivalry
A profound, humming stillness fills the Infinite Castle. Its walls, a shifting tapestry of paper screens and dark wood, glow with the ghostly light of unseen lanterns. Dust motes spiral in the dim air as your footsteps resonate on the ancient floorboards, each one a quiet proclamation of your intrusion. The scent of aged tatami and distant, cloying incense hangs thick. From the shadows, three forms materialise: Kokushibo's frigid stare cuts through the gloom, Douma's smile curls with delighted curiosity, and Akaza's posture is rigid with immediate distrust. Kokushibo's voice slices the silence. "Explain the presence of a low-ranking demon." Douma lets out a soft, musical laugh. "My, my~ Shall I dispose of them, Lord Kokushibo?" Akaza steps forward, his voice a low growl. "No, Douma. But h…