Naoto Tachibana/Synopsis

History
Naoto is being bullied by some guys, however, Takemichi Hanagaki manages to chase them. Takemichi gives Naoto advice to be more confident and not back down, which will scare off the half-assed punks. Learning that Naoto is Hinata's little brother, Takemichi tells him to take care of his sister and reveals that on the same day in 2017, he fell into the train tracks and ended up 12 years in the pat. He reveals that on July 1st, 2017, Hinata and Naoto will die, so he must remember that date and protect his sister. Naoto takes this seriously and Takemichi then shakes Naoto's hand.

Toman Arc
Naoto saves Takemichi from the train track incident. As Takemichi awakens in the infirmary at the station, Naoto reveals that Takemichi had time traveled and had changed his fate and in return Naoto managed to save him. Naoto reveals he studied really hard and became a police officer, however, he still wasn't able to protect Hinata, who still died. Naoto then asks Takemichi to help him save his sister and Takemichi agrees.

Naoto explains that his power is time travel and he is able to jump on the exact same day but 12 years ago. Takemichi spends two days without sleep in Naoto's room, where Naoto gives him all the information he had obtained about Tokyo Manji Gang and wants him to remember it. Some of the information he is giving him, is not known to the media as his predecessor managed to obtain it while was investigating undercover, but after he was discovered, he was killed. They found a video recording of his death in his eye socket. Naoto kept requesting transfers until he was finally transferred to his predecessor's position six months ago.

As Takemichi can't go back on any date he wants, Naoto tells him that when he gets back 12 years ago, he needs to meet the Tokyo Manji Gang top two members: Manjiro Sano and Tetta Kisaki. Naoto states that if those two never met, the current Tokyo Manji Gang would never exist and his sister wouldn't have to die. Takemichi wonders how he will go and Naoto mentions that Takemichi told him he went back in present after handshaking Naoto and he believes that's the trigger. Naoto informs Takemichi that Manjiro and Tetta met in August and he must stay close to one of them and prevent them from meeting. They shake hands and Takemichi time travels 12 years ago.

Takemichi ends up accidentally shaking Naoto's hand in the past and returns to the present. Naoto wonders if something changed, but gets angry learning it was an accident. However, he reveals they learned something new - if he spends a week in the past, he will also spend a week in the future and his body would remain in suspended animation. Takemichi reveals he met Manjiro Sano, making Naoto wonder why he didn't kill him and that if he could, he could have killed him himself. Takemichi suggest they go and see Manjiro as he wants to learn from him, why Toman changed.

Naoto agrees, stating that Takemichi's weak side seems gone. While they go over documents to look for a way to find Manjiro, Naoto sees someone he doesn't recognize. Atsushi Sendo had become a member of Toman's upper echelon. Naoto finds it strange as in his timeline, Atsushi got arrested for stabbing Masataka Kiyomizu and after his release he was just a no-name punk. They realize Takemichi must had changed the past after he met Manjiro and decide to call Atsushi as he may arrange a meeting with Manjiro. Takemichi manages to arrange a meeting, but Atsushi wishes to speak with Takemichi alone. Atsushi ends up killing himself and Takemichi tells Naoto to look into the day Ken Ryuguji died, as it was Tetta Kisaki who turned Toman evil. Takemichi then decides to save everyone.