Azu is a female student attending a school in Tokyo. However, her parents are often away from home, so she lives with her brother, who is a businessman. Although Azu is a quiet and good student, she has a tendency to fantasize, and every day she imagines being pinned down by middle-aged men and indulges in masturbation. One day, she is attacked in her sleep by Oshima, a man from the neighborhood who brought a notice, and they have sex. This leads to her being noticed by Oshima's friend, the gangster Dango, and Dango's friend, the delinquent middle-aged Hitou...