Hiro's and Sota's hearts burn bright again when they play together in their first Gunpla Battle since their elementary-school days. They visit their old secret base to reunite Team BRIGHT and prepare for the National Tournament. Problematically, Nakamaru has been letting his female classmates use the base, and they have to share the space now. Sota worries that the girls will hinder the team's activities, but Hiro is excited to have them there. Meanwhile, a strong team named MONSTRE requests a match.