Gundam Build Divers

After witnessing the champion Kyoya Kujo in Gunpla Battle, Riku Mikami and his friend Yukio Hidaka have resolved to dive into the GBN world themselves. For the first time, they enter this virtual cyberspace dimension as "Divers," discovering spectacles greater than they ever imagined and an unending series of surprises. However, another Diver is watching the pair from hiding.

Riku and Yukio reflect on their first experience with GBN. They run into Momoka, who tries to get them to join the soccer club, but she is unable to stop them going back to GBN. Diving into the virtual cyberspace dimension again, they are reunited with Sarah, and instead of playing Gunpla Battle they choose a Collect mission whose goal is to collect a key item.

Re-watching the fierce battle of the Gunpla Force Tournament, Riku once again yearns to be as strong as the champion. He and Yukio agree to try out the new weapons they've prepared, while Momoka, who has been inspired by them, finally decides to join GBN. The three of them dive into the Dimension, where a Diver who called himself Kyoya asks to accompany them in a Serial Battle mission.