Due to her husband's solo assignment, Rika lives a life similar to that of a single mother with her son. One day, she finds out that her son Takumi is being bullied and visits the home of the ringleader, Hashimoto. She thought that Hashimoto, who had been with Takumi since kindergarten, would understand if she talked to him. However, Hashimoto demands her body in exchange for stopping the bullying. "If this will save Takumi..." Rika quietly offers her body. But it's not over after just one time. One day, Hashimoto brings his friends to her house...
