Recently developed an interest in women, Ryo decides to visit a soapland for the first time in his life. However, the person who appears before him is someone completely unexpected—his own mother, Reiko. But Reiko lies, claiming, "I'm Tsubaki." Ryo feels anger at the deception, yet gradually learns the true reason why his mother is working at the soapland, deepening their bond as mother and son. Through rising emotions and physical intimacy, a new kind of familial connection is born.