After the fierce battle, a beam of light fired from the stationary satellite presented the shocking possibility that "Planet Eldora," where Hiroto and the others had been fighting all along, was not part of the network game "Gunpla Battle Nexus Online (GBN)," but the real world. This revelation brought the Build Divers to a temporary halt. However, the bonds forged with Freddy and the other people of Eldora, whom they fought alongside against the One-Eyes, reunite Hiroto, Kazami, May, and Parviz. The whereabouts of the diver, Sido Masaki, whose consciousness remains trapped on Eldora. The true identity of Alus, the mysterious being leading the One-Eyes. And above all else, to save their irreplaceable comrades, Freddy and the others... Yes, there is still a "mission" left to clear on Eldora. Armed with their newly built power (Gunpla), the true battle of another Build Divers begins here.