Following their victory at the Gunpla Battle National Championships, Team Try Fighters receives an invitation from Yajima Trading to a secluded island for testing a new battle system. Sekai and Fumina soon discover that other familiar faces like Gyanko, Shia, and Minato were also summoned. While Yuuma initially declines due to a photoshoot commitment, he eventually finds himself stranded on the same island with his teammates. As the Nielsen Lab faces a Plavsky particle anomaly, a massive crystal emerges, causing chaos among the Gunpla on the island. Now, the Gunpla Fighters must unite to prevent the crystal's destructive influence from spreading to Gunpla Battle Systems worldwide.