Wang, whom he has loved since his high school days, has become his best friend's wife, and he is forced to watch them lovey-dovey... As he is in despair, he suddenly obtains a strange button. When he presses it, he is transported back to the past... Realizing that he can do anything because he can go back to the past, he tries to rape Wang and confess his feelings to her, but it doesn't go well... He then decides to go back to his high school days and take his best friend's body and Kokoro...