Shunpei Kaga (Daiki Shigeoka), Koshiro Mizumoto (Tomohiro Kamiyama) and Ayumi Kohinata (Kaya Kiyohara) have been close friends sine they were children. Koshiro Mizumoto confesses his feelings for popular Ayumi Kohinata and their relationship develops romantically. On the day of their first date, Ayumi Kohinata and her unpopular classmate Zenko Umine (Miu Tomita) suddenly change bodies. Ayumi Kohinata is devastated and nobody believes her, except for Shunpei Kaga. Ayumi Kohinata looks for a way to get her body back.