In a little town near Osaka, an old tradition is being perpetuated. Every year, for hundreds of years, the men of the town defy each other in the "grand ceremony of Masuraou". Their weapons? Their courage and their fists! Their goals? Becoming the king of the town!

It's in this atmosphere that Takeshi Yamato, a young high schooler from Tokyo, moves in. An ex-gang leader decorated with an incredible secret, he has decided to forget the past and become a socially acceptable guy...

However, between his secret being found out, the fights, the girls and messing around with his friends, he is far from becoming a model high schooler.