Tokyo revengers. 15-16

"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 films! 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 Hinata's death in the present. To save Hinata and change the future, Takemichi must rise to the top of Kanto's most sinister delinquent gang! But things aren't so simple when he befriends the gang's leader, Mikey. What turned Mikey from a petulant child to the leader of the most infamous gang in Tokyo?" --