Set two years after the story of Gundam Build Divers, a new version of the "Gunpla Battle Nexus Online" (GBN) game launches.
In the upgraded GBN, Hiroto continues to play as a solo mercenary. He is greeted by a Diver named Kazami, who suggests that they team up. Hiroto flatly rejects the idea, but Kazami appears undeterred. His goal is to attempt a rumored hidden mission.
