The game begins with Ayumi Shinozaki who is telling a scary story to her friends who have decided to stay in school after the cultural festival. Suddenly, someone knocks at the door and Satoshi Mochida, terrified, goes to open it. He is surprised when he finds his little sister who came looking for him. Following the presentations, the classmates decide to tidy up the room until they hear a strange sound.

Frightened, they prepare and leave the class when a sudden earthquake catapults them into an abandoned schoolhouse. The protagonists are all in the same dimension, but they decide to form two groups to search for clues.