Tokyo Revengers

When down-on-his-luck young adult Takemichi Hanagaki discovers that his middle-school sweetheart Hinata Tachibana was murdered by the notorious Tokyo Manji Gang, an unexpected push onto train tracks sends him hurtling twelve years into his own past. Determined to prevent her tragic fate and save his closest friends, Takemichi resolves to rise through the delinquent ranks and reshape the gang from within.