Nekketsu Koukou Dodge Ball-Bu

One day the Nekketsu High School Dodgeball club get a letter. A date, time and place, what could this mean? "Nekketsu High, we invite you to come to the Dodge Dome for a friendly practise!" Kunio is tempted, this is a prestigious chance to showcase his skills. Upon entering the dome, only Nekketsu High is there. Suddenly a voice over the speaker system cries "HAH! You walked right into my trap! I have assembled 6 teams to take you on. Defeat them or be humiliated!" Stand up, Kunio! Fight the 6 teams and uncover the culprit behind this trap!