I'm a bullied child who gets my mother a bullying classmate

Her husband is on a business trip and lives alone with a mother and child. He reaches out to the lonely family environment of his son's classmate Yuji, who has recently moved to his house. Yuji, who had bullied Minase's son at school, takes advantage of her kindness and pushes her down as she desires. After having a physical relationship with his son's classmate, Yuji is troubled by his wife and plays with her even more. As her body continues to develop due to the repeated humiliation that occurs every day, her body begins to wet her crotch with secret expectations...