In order to change his life as a student who was not popular with women, Koji is honing his technique with a dating app. Thanks to the one-night stands he enjoys with sluts almost every day, his sexual skills have reached the pinnacle. Among them, his favorite targets are sexually frustrated married women who are happy to have affairs with Koji. Today, as always, he matches with a gorgeous wife and is about to crash into bed, but... it turns out to be Tomomi, a beautiful former classmate who was at the top of the school caste system. Tomomi also realizes that Koji is a former classmate who was not popular with women and tries to leave, but...