Takeshi loves his wife, Yumi, but he is tormented by the desire to have her taken away. One day, he shows Yumi a wife-swapping website and confides in her about his struggle. Though confused, Yumi agrees to attend an offline meeting hosted by the site, just this one time for her husband's sake. There, another couple, the Nakamuras, were waiting. The other wife, Chie, was also anxious, but after receiving a lecture from the host, Sakurai, the two couples exchanged partners and indulged in unprecedented lewd copulation…
