In a vast, empty room devoid of any objects, only space itself existed. Within it stood an incongruous presence—a schoolgirl in uniform, her hands bound, her lifeless body leaning against the cold wall. The room's only exit, a heavy door, creaked open, and a single shadow silently crept inside. The shadow stopped before the girl, gazing down at her. In its hand, it tightly gripped something, slowly inspecting its prey while licking it hungrily. When the girl opened her eyes, all that remained was sheer despair.