Two traveling B-Cubers named Rebecca and Happy visit the abandoned Granbell Kingdom theme park and meet Shiki, a sole human boy raised by robots. Just as Shiki and Rebecca begin to strike up a friendship, the robots suddenly turn against them, claiming to want revenge against humanity. The three escape together on Rebecca’s ship and blast away from the planet itself, revealing that she and Happy are actually space travelers, and kicking off an adventure that will end with Shiki’s name known all across the universe.
