Dive Rio Hojo is a young boy who is enthusiastic about his Gunpla hobby, and with the help of his instructor Seria Urutsuki, he develops his own Gunpla dubbed Lah Gundam. Meanwhile, he hones his battle skills with his online mentor Mask Lady. Rio then decides to test his skills in the online game Gundam Metaverse, where he joins a team battle with Riku, Sarah, Ayame, and Momoka from the Build Divers...