Top 9 in Top 10 Best Friendship Manga of All Time That You Should Not Miss.
Other name: 東京卍リベンジャーズ
Author: Wakui Ken
Genre: School life, shounen, action, drama, comedy
What it's about: Hanagaki Takemichi, a 25-year-old unemployed man, discovers that his ex-girlfriend, Hinata Tachibana, as well as her younger brother Naoto Tachibana were killed by the Tokyo Manji gang (Touman for short). When Takemichi is pushed off the station onto the tracks, he suddenly goes back to 12 years ago (2005). He meets Hinata again and informs Naoto of the deaths of both Naoto and his sister 12 years later. After the two shake hands, Takemichi about 12 years later, discovers that he is alive, saved by Naoto, now a policeman. It turns out that Takemichi has gone to the past, creating a time paradox where Naoto lives. Naoto guesses that every time he shakes hands, Takemichi will return to the past exactly 12 years ago. Using the insights 12 years later, Takemichi vowed to save Hinata.