Ran is a daughter who lost her mother at a young age and lives in a single-parent household. However, her father is a workaholic and is rarely at home, so she lives alone every day. Ran has a tendency to fantasize, and masturbates almost every day imagining being gang-raped by middle-aged men. One day, she is attacked in her sleep by a man from the neighborhood, Masakazu, who has brought her some leftovers, and they have sex. This catches her attention from the middle-aged men in Masakazu's family, and she falls into a life of debauchery...