In Gundam Build Fighters Try, the tale picks up seven years post the initial series finale, following the victory of Iori Sei and Reiji at the 7th Gunpla Battle World Championships. Seiho Academy's Gunpla Battle Club faces a slump with only one member, Fumina Hoshino, a third-year junior high student and the club president. To compete in the upcoming All-Japan Gunpla Battle Championships, she urgently requires two more members. Fate intervenes as she crosses paths with Kamiki Sekai, a transfer student skilled in Kenpo and Kousaka Yuuma, a talented young Gunpla artisan. Together, they embark on a thrilling journey into the world of Gunpla Battle.