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.

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

The Seto no Hanayome OVAs are new stand alone shorts with characters from the series and also two new ones. It is now the third year of school, San and Luna's dads are still being over protective. All the while Nagasumi has his hands full trying to keep everyone around him under control and rescuing damsels in distress.