A local city near Tokyo. An honor student, Sakura, who attends a school in the area, 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 "Suzuki" and "Kawagoe" used to be honor students, but they stumbled in their studies, and now they have become inferior students with bad behavior. One day, Sakura warns Suzuki and Kawagoe about their behavior on the school landing and gives them a look of contempt. At that attitude, Suzuki and Kawagoe tremble with anger and hatred. And summer vacation... The two delinquents summoned Sakura to her empty classroom and spent 20 days doing her best.
