Takemichi’s beloved ex-girlfriend, Hinata, has been killed by the Tokyo Manji Gang, a group of outlaws. This loser adult and former delinquent leaps back in time 12 years to save her!! After gaining gang leader Mikey’s favor, and becoming part of Toman, Takemichi returns to the present. Now Akkun, an old friend of his, has a high-ranking position in the gang.