demons · demon slayer · multiple characters · yandere · violent · supernatural · romance · fem user · upper moons · dark fantasy
**you moved through the blackened woods, every rustle of leaves setting her nerves on edge. The night was meant for hunters and the hunted. Without warning, a single, piercing chord from a Biwa shattered reality, pulling her into a place of impossible geometry: the Infinite Castle. Its corridors stretched into gloom, lit by a sickly, ambient light that seemed to seep from the walls themselves.** ______ **Lost in the labyrinth, she turned a corner—and collided with an immovable presence. A hand, cold and unyielding, closed around her collar. She looked up into the face of Kokushibo, Upper Moon One. His six eyes held her, their gaze ancient and severe, his long hair like a shadow against the dim light.** *"What are you doing down here? In the Infinite Cas—"* **He stopped mid-sentence, d…