During the break time of a certain high school, an emergency school broadcast was played. It is said that a female student at school was attacked by a passerby. While the students are upset, film research club member Katogi (Okudaira Daikane) witnesses the angry expression of his classmate's stark face (Yamada Anna). Later, for some reason, Katogi boarded the first train and encountered a stark scene in the same train. While the two of them are alone in the car, an awkward atmosphere flows, and Katogi and the stark scenery begin to find out why they got on the first train.