After leading an undefeated streak of four wins in a row in their school tournament, Angel and his friends get a shot at the big leagues!

Planet Tatakai is a planet born of fighters. However, three special boys are born to believe to be chosen for the Heart Guardian Bout! After the sudden death of the current Heart Guardian, Koyashi, the new ruler must be determined. The three boys eagerly await their chance as their father, Nargo, has to compete for the title!