One day, Umi's husband brings her best friend home. She could not believe her eyes. It was her old boyfriend. In the awkward atmosphere, the best friend realizes that "Umi" has been two-timing her. She then decides to disrupt the happy home. During the three days her husband left, he enters her house and sfucks her. After that, he continues to stay in the house and performs the act every day. Then, he ejaculates inside her body. Her heart breaks because she can no longer stand it. And then...