Tokyo Revengers
Synopsis: Takemichi Hanagaki's ex-gf Hinata Tachibana is murdered by the Tokyo Gang Manji Gang. Trying to figure what went wrong the protagonist Takemichi finds himself traveling back in time (12years to be exact). A time where he was still in a relationship with his ex HInata. Takemichi realizes he can still save her from being murdered by the Tokyo Manji Gang by joining and climbing the ranks in order to rewrite the future and save Hinata from her tragic fate.
Where to watch:
Streaming on crunchyroll