This is an automatically translated description

Loser Takemichi can change everything, because he has been given the ability to travel back in time in a bizarre way. He can rewind time 12 years and prevent a tragedy.

First, he intended to save his beloved Hinata, then his childhood friend Akkun joined her, and now Takemichi realises that it all started with Doraeken's death in a battle with the enemy gang Möbius. Without Dōraken, there was no one to restrain Mikey's mad temper, and the Tokyo Manji began to terrorise the entire city.

This is supposed to be the key moment, changing which Takemichi will save many lives. Perhaps even his own.

What to do? Takemichi has never been strong, and he never knew how to fight. How can he save one of the best fighters in the gang?

You have to think of something immediately and hope it works. Otherwise...

He'll have to start all over again.