Takemichi Hanagaki is a consultant that's gotten to the outright pits of despair in his life. He finds out that the only partner he ever before had, in middle school, Hinata Tachibana, had been killed by the fierce Tokyo Manji Gang. The day after finding out about her death, he's standing on the station system as well as winds up being pushed over onto the tracks by a herd of people. He shuts his eyes believing he's about to die, however when he opens his eyes back up, he in some way had actually returned in time 12 years. Now that he's back living the best days of his life, Takemichi determines to repay on his life.