Her father died in a traffic accident, Yuzuhira's mother decided to take another step forward with the desire to have someone to be the breadwinner in the family, always loving and caring for the mother and daughter. But life is not so rosy. Yuzuhira's stepfather is a patriarchal man who despises women and is often angry, ordering her mother not only to do household chores but also to work outside to earn money to support him. Yuzuhira's mother's calculations were ultimately not outlined as desired, and even backfired. However, that wasn't all, he was also extremely lewd, often stalking Yuzuhira to take a bath. During one of her masturbations, he suddenly rushed in to force his wife's stepson to have sex with him and then threatened her not to reveal it. At first, Yuzuhira was very scared and disgusted, but after being raped for the second time while watching TV, she completely changed that mood, instead of a happy, new feeling when she first had sex. Just like that, she became more and more involved in the clumsy and incestuous love affair between herself and her stepfather.