Miyu and Shuya are high school students. They have dated for 2 years. Miyu and Shuya have a promise that no matter what, they will watch a movie together on the first day of each new month. When Miyu and Shuya are on their way to the movie theater, Shuya suddenly cancels their date. Shuya seems like he is hiding something and he acts nervous. Later, Miyu goes to the place where she is supposed to meet Shuya, but she witnesses Shuya getting into a car accident. She panics, but when she wakes up she finds herself on the morning of the accident. Miyu keeps waking up on the day when Shuya got into an accident.

As a member of her high school's newspaper club, Airi looks forward to the annual creation of the town's tourism promotion posters, but it gets canceled; to suggest an alternative project, she rallies her class for support.

A university student investigates the truth behind a high school incident. As testimonies and rumors collide, the truth begins to blur, and her own past actions come into question. A youth suspense drama exploring collective psychology shaped by cycles of spread and conformity.