Tokyo revengers omnibus 3. The razor’s edge (vol. 5,6)

 The critically acclaimed manga series about a man time-traveling back to his youth to save his girlfriend from a street gang‒which inspired the wildly popular anime and live-action film!Watching the news, Hanagaki Takemichi learns his junior-high girlfriend Tachibana Hinata has died. A sudden shove sends him 12 years into the past to face the Tokyo Manji Gang that once made his life hell, which is also responsible for Hinataâ€â„¢s death in the present. To save Hinata and change the future, Takemichi must rise to the top of Kantoâ€â„¢s most sinister delinquent gang! But things arenâ€â„¢t so simple when he befriends the gangâ€â„¢s leader, Mikey. What turned Mikey from a petulant child to the leader of the most infamous gang in Tokyo?