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.

Set in a far flung medieval-looking world of Arst, Prince Jordy Volder takes up the fight against the ambitions of the conqueror Marder. Jordy uses the legendary giant robot "panzer" Galient, which is one of many panzers that have been preserved underground for thousands of years. Using an army of advanced robot panzers, Marder is conquering all of Arst in preparation of his plan for dominance of the Crescent Galaxy.

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.