A mother who took the place of her son

Rika, a wife, lives a life similar to that of a single-parent household because her husband is away on business. One day, he learns that his son Takashi is being bullied and visits Hashimoto's house, the main culprit. I thought Hashimoto, who had been with Takashi since kindergarten, would understand if I talked to him, but instead he demanded my body in exchange for stopping the bullying. ``If that will save Takashi...'' Rika meekly offers her body to him. However, it couldn't be a one-time thing, and one day Hashimoto came to her house with his friends...