Ep. 1: Rebecca and Happy visit a robot-run theme park to film content for their channel.

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Content creators Rebecca Bluegarden and Happy travel to the Granbell Kingdom, a century-abandoned theme park operated by robots, to record videos for their online B-Cube channel. They meet Shiki, a human boy raised there who serves as the robots' mechanic. Rebecca initially resists his friendship but warms to him after seeing his bond with the machines. She learns he stayed to care for them and failed to repair his adoptive grandfather, Demon King Ziggy. The robots suddenly turn aggressive due to a staged virus, dismissing Shiki's skills to force him to leave. Shiki uses his gravity Ether Gear ability to help Rebecca and Happy escape in their ship, the Aqua Wing. The robots shut down to save Shiki from solitude. A female entity named Mother observes his departure into space.