Having an affair with her husband's best friend Yuka Arai. Miho and Yuto were living happily after moving into the house they had worked so hard to buy. One day, Shingo, a childhood friend of her husband, suddenly came to visit. He said that the company he was working for went bankrupt and that he was kicked out of the company's housing at night without any warning. Kind-hearted Yuto agreed to help Shingo, asking Miho for permission to let Shingo stay for a few days. And this is what led to the lustful Miho's affair.