Before Keiko married her husband, Yuji, she had a romantic relationship with her high school classmate Kensuke. They never met again after that, but they met again by chance in town. Keiko remembered the passionate sex she had with Kensuke after a long time. Even though she knew it was an affair, Keiko went to the love hotel as she was invited. As she received Kensuke's intense caress like an animal, she felt Keiko deep inside her body. On this day, Yuji is on a business trip, so Keiko, who wants to hold him until the morning, calls the hotel where Yuji is going on a business trip just in case, so that his affair won't be discovered. However, Yuji mistakenly thinks that his girlfriend Keiko is lonely and calls her home, but no one answers...