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.

Mantaro has made it to the semifinal match of the Chojin Cup. He must now fight Ricardo in a soccer field to advance to the last match. Kevin Mask is also in the semifinals, and must defeat Ilioukhine in an aerial field to advance. These three matches will determine who wins the Chojin Cup.

On the vast continent, heroes break through obstacles and chase their dreams. What are heroes like? They go beyond themselves and try to be perfect; They carry burdens forward and understand the true meaning of love; They advocate power and never give up. We write biographies of heroes and start a new chapter of love and courage.

OVAs bundled with the 15-17th volumes of the Mushibugyou manga.