Ryou Takagi is a high school student and a trumpet player in a jazz band. However, he is also a vicious brawler who earned himself the nickname of B.B on the streets. This stands for "burning blood", because of the way he lights up with rage whenever he gets serious in a fight.

After feeling helpless at his defeat by the hands of Jin Moriyama, Ryou learns that Moriyama practices boxing. It's at this moment he decides to put all of his effort into learning the sport of boxing, and attempts to get a boxing club created at his school.

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