Kinniku Banzuke: Kongou-kun no Daibouken!

It's every high school baseball team's dream to go to the legendary Koshien Stadium Tournament. For the first time in years, Seido High School has a chance—star player Gorilla Matsui has finally given the team an opportunity to succeed. Most delighted at this prospect is Principal Kocho. However, the Head teacher reveals to him that the first game will be played against the Gedo High School, infamous for brutally killing all their opponents. Kocho instantly loses all hope, both for his students' lives and of winning the tournament.

The Chojin Crown, the tournament which Mantaro (Kid Muscle) reluctantly participates in. After going along with the obstacles (most of which were created to try and eliminate him), he qualified.

Kinnikuman has proven himself worthy to be crowned the next king of Planet Kinniku. But at the ceremony, five other Kinnikuman's arrive, all claiming to be the true prince of Planet Kinniku. Now, a Royal Survivor Tournament is being held to decide the true successor to the throne, and with the help and support of his friends and with his recently acquired knowledge of the Ultimate Technique (The Muscle Spark), Kinnikuman fights for what is rightfully his.

In order to fulfill their dead father's wish, the siblings, Kiku Takane and Ryuuji Takane aim for the champion title of the boxing arena. The sister, Kiku, will act as the trainer while her brother, Ryuuji, will concentrate on the role of the boxer and learn the Boomerang Hook technique. His battle with many rivals has led to the growth and maturity of Ryuuji. The junior high boxing tournament has began and Ryuuji will be fighting his arch-rival, Jun Kenzaki. The battle begins.