A hot-blooded boxing comic depicting the activities of Takasugi Shiro, a high school student returning to the United States who will be living in a boxing gym. His father, a genius boxer, died in an accident and returned to Japan from the United States. Shirou Takasugi decided to stay at the house of Saiki, a friend of his father who runs a boxing gym. And Saiki burns to make Shirou the world champion, but Shirou says he won't do boxing ...!?