Struggling manga author Satoru Fujinuma is beset by his fear to express himself. However, he has a supernatural ability of being forced to prevent deaths and catastrophes by being sent back in time before the incident occurred, repeating time until the accident is prevented. One day, he gets involved in an accident that has him framed as a murderer. Desperate to save the victim, he sends himself back in time only to find himself as a grade-schooler one month before fellow classmate Kayo Hinazuki went missing. Satoru now embarks on a new quest: to save Kayo and solve the mystery behind her disappearance.

Private detective Kogoro (Kouta Kusano) receives a request from Naoko (Yuki Mamiya). She is the daughter of a family that runs a large hosital. Naoko wants private detective Kogoro to investigate her fiance Endo (Yasushi Fuchikami) and whether he is having an affair with university student Teruko (Noriko Kijima).

Protagonist Katsutoshi leaves town after a fight at work, and seeks refuge at a salon run by Seikichi, his Tokyo-based old friend, called “Tokyo Playboy Club.” Meanwhile Eriko, the girlfriend of a waiter at the salon, finds herself forced to work there as a hostess after he gets into a bit of trouble. Then one day Katsutoshi brawls with a lowly neighborhood gangster, beating him to a pulp. The incident causes him, Seikichi, and Eriko to become embroiled in an even graver situation….