Cosmic Era year X492…

A time when countless people venture into space to travel between stars. Rebecca is a "B-cuber" online video streamer who comes across Shiki, a young boy that can control gravity, on the robot-inhabited planet Granbell.

Shiki follows the teachings of his foster guardian, the robot "Demon King" Ziggy, and treasures his friends over everything.. Rebecca strikes up a friendship with Shiki, and takes him on an adventure through space, outside of the only planet he has ever known.

Shiki's first time in space---new sights, new people, new everything!
This is the beginning of a great and exciting adventure in space, with starry-eyed Shiki and his friends.

[Source: Crunchyroll]