Tokyo Revengers

Takemichi Hanagaki was leading a hopeless life working dead-end part-time jobs when he learned that Hinata Takahashi, the love of his life since junior high, had died at the hands of the vicious Tokyo Manji Gang.
The day after that, someone pushed Takemichi in front of a train. But just as he’d given himself up for dead,
he came to and realized that somehow, he’d traveled 12 years back in time.
Now transported back to the glory days of middle school, Takemichi will save the girl he loves, confront his own weak past self, and get the revenge of a lifetime!