With her husband working away from home, Minase lives with her son. Recently, her son's classmate, Yuji, moved in next door, and she can't help but lend him a hand in his lonely home life... Yuji, who bullied Minase's son at school, takes advantage of her kindness and pushes her down in a fit of lust. Yuji further drives Minase to the point where she is troubled by the fact that she had a physical relationship with her son's classmate. As her body continues to be developed through the repeated humiliation every day, her body begins to get wet with secret anticipation...