On the planet Granbell, Shiki has led an isolated existence, growing up as the sole human in the Granbell Kingdom—an amusement park run by machines. However, this changes with the arrival of Rebecca Bluegarden and her feline companion, Happy, who are unaware that they are the first visitors to this abandoned park in a century. Intending to create humorous videos for their B-Cube channel, they instead discover and befriend the socially awkward Shiki. When the machines render Granbell too hazardous, the trio escapes and returns to Rebecca and Happy's home world, Blue Garden. There, Shiki registers as an adventurer with the Shooting Starlight guild and learns of the enigmatic goddess, Mother. Intrigued by the familiar sensation she evokes, he resolves to embark on a quest to find her, an achievement no one has ever attained. Choosing to accompany him, Rebecca and Happy assist Shiki in beginning the search for Mother, filming stylish videos and making new friends along the way!