A single mother and her daughter improve their lives after the mother remarries. However, the new father, Ichibu, is a disgusting man, and his stepdaughter, Aiko, often finds him peeping at her while she's in the bath. At night, he has sex like an animal, and the moans of his wife, Keiko, torment Aiko's ears. To escape such days, Aiko starts a relationship with her teacher, Ando, and engages in intense affairs. It seemed almost like a challenge to Ichibu and Keiko... but on that day, Ichibu returned home while they were in the act...
