Yuzu, an honor student who attends a certain school in Tokyo, is a serious student with a strong sense of justice. - He comes from a wealthy family and is able to study well, and plans to enter a famous university after graduating. - On the other hand, classmates Kawagoe and Meguro were originally honor students, but they stumbled in their studies, and now they have become inferior students with bad behavior. - One day, Yuzu encounters the scene where Kawagoe is shaving. - Yuzu warns Kawagoe of his behavior and looks down on him with contempt. - Angered by her attitude, Kawagoe secretly takes a picture of Yuzu excreting and uses it as a joke to threaten her. - And summer vacation ... I called him to a classroom where there were no students and did his best as long as possible ....