Momo is married to her current husband and has a carefree life, but there are certain things that she is not satisfied with. One day, Momo attends a class reunion and reunites with Sato, her first love. Although they loved each other in the past, it was Sato who turned Momo into a woman and not her husband, yet neither of them expresses their feelings. This time, Sato does not want to regret anymore; he takes the initiative to confess to Momo, something he has not dared to say for years. They chat happily, but Momo drinks a bit too much and quickly gets drunk, so Sato has to take her to a hotel to rest. Looking at his beautiful and seductive former lover in front of him, Sato uses her drunkenness as an excuse to once again have her. Although Momo protests verbally, her body always responds to each thrust of him. She also remembers the pleasure that Sato brought her, something that her current husband cannot provide. From then on, Momo continuously lies to her husband to meet Sato, who has never doubted her because he trusts her completely.