Takashi started living apart from his wife after she became pregnant. He managed to abstain for a while, but eventually, unable to resist, he snuck off to a soapland... Only to find that the No.1 girl who came out was none other than his wife's best friend, Yumi! Though Takashi felt guilty, Yumi, sensing his need for comfort, served him with her whole body... He became obsessed with the supreme pleasure he experienced from her voluptuous body. Since then, he's been sneaking away, clutching his meager allowance, and repeatedly calling for her.