One day, Sakura, a teacher, and her fiancée, Kameda, a colleague, visited the house of Yugo, a student who refused to go to school in the class she was in charge of. She came to visit her home against the objections of her fellow teachers. However, as soon as Yugo welcomes Sakura in, he makes Sakura and Kameda drink tea with sleeping pills, and breaks Sakura down in front of Kameda. Her father, Oshima, who is a yakuza who appeared in the middle of the act, and his subordinate thugs, and three people, complete Sakura's circle.
