After her husband passed away, Chisato was persuaded by her worried daughter to live with her daughter and son-in-law. After their nighttime affair, the daughter and son-in-law would talk about the financial difficulties, salaries, and part-time work, which made her feel depressed. And then, their nighttime affairs stopped. Then, one day, the son-in-law was left alone with his wife's mother, Chisato. He unintentionally showed his weakness, and Chisato comforted him. The son-in-law was aroused by Chisato's gentle embrace, and began to fondle her breasts. Chisato told him not to, but she couldn't help but feel it...