Adultery with the best friend of Yuka Arai's husband. Miho and Yuto are living a happy life after moving to the house they tried to buy. One day, Shingo, a husband's childhood friend suddenly visited. He said that the company he was working in bankruptcy and at night and he was kicked out of the company's house without a warning for him to prepare. Yuto kindly agreed to help Shingo, he asked Miho's opinion that he would let Shingo stay for a few days. And this is the cause of the adultery of the lewd Miho.