Ordinary girl wakes up one morning and the world doesn't stop trying to kill her. The animation moves like nothing else from 1985, fluid and violent and alive, every frame proving animators could make you feel dread through pure draftsmanship. Nagisa survives because a stranger in a uniform decides her life matters more than the incomprehensible thing hunting them both, and that choice costs everything.

Nagisa is a typical schoolgirl who oversleeps, hurries to class and chats with friends on the way. One morning a woman in an odd uniform seems to fix her gaze on Nagisa, leaving her rattled. Later, a ball bounces by itself and hurls into her classroom window, breaking the glass without hurting her. She then faces a tooth-filled maw with nobody else around. When she screams, everything snaps back to normal, and her puzzled classmates stare at her. The three-episode OVA mixes horror, mecha, science fiction, ecchi and action.