A determined young woman named Iijima materializes in the present day, her arrival marked by urgency and a futuristic weapon she cannot wield herself. Having fled a future overrun by grotesque reptilian monsters, she begins a discreet search across campus for a man strong enough to claim the blade and stand against the coming invasion. As subtle signs of otherworldly danger surface around her, Iijima must quickly gauge who among the students possesses the resolve to become Earth’s unlikely savior.