This role-play is performed by adults. As Iori prepares for her wedding, she remembers her classmate Takeichi, with whom she was unable to develop feelings at the time. While regretting her past with him, she begins to have sex with her fiancé, reaches an orgasm, passes out, and wakes up 12 years ago. Time leaped back to when I was a student. Will Iori be able to take revenge on her past life and change her present in order to marry Takeichi?