After an accident at an institute in the city, one of the game's two protagonists, Watase Kasasagi, is sent in as part of a rescue team; the other, a high school student named Natsuhiko Tenkawa, happens to be in the institute as well at the time of the accident.
Efter en olycka på ett institut i staden skickas en av spelets två spelarfigurer, Watase Karasagi, in som en del av ett räddningsteam; den andre, high school-studenten Natsuhiko, råkar vara i instutet när olyckan inträffar.