Season 1

High school student Kiichi is on the fast track to martial arts super-stardom. An expert in the deadly Nanshin Shadow Style, he faces the challenge of his life: the long-awaited grudge match with his father's arch-nemesis, the champion of World Pro-Wrestling! Fists fly and blood spills as a new breed of fighter takes to the ring!

Iron Kiba challenges Key-bo's father to a death match, only to be refused time and again. A scheme is hatched to send an assassin against Key-bo in order to bring Key-bo's father to seek revenge. Key-bo must fight or die!

When it comes to martial arts, Kiichi Miyazawa has always been the best. But when his father is hospitalized, it's time for the teen super-star to become a man and take on the big time. Kiichi must take his father's place in the ring against the champion of World Pro-Wrestling, the legendary Iron Kiba! Will he survive and triumph in his father's name? Or will his family's arch-nemesis terminate his martial arts career, and his life?