前人未到、王道SF！
宇宙歴X492年――
無数の人々が宇宙に飛び立ち、星々を巡る時代。
動画配信者B・キューバーのレベッカは、
機械の惑星グランベルで重力を操る能力を持つ少年シキと出会う。
『魔王』と呼ばれた育て親である機械のジギーの教えにより、
何よりも友達を大切にするシキ。
そんなシキと友達となったレベッカは、
外の世界を知らないシキを宇宙への冒険へと連れ出す。
初めての宇宙、初めての景色、初めての人々。
目を輝かせ、これからの冒険に思いを馳せるシキと
仲間たちをめぐる心躍る大宇宙の物語が今、始まる――
All his life, Shiki has been surrounded by machines. At Granbell Kingdom, a long-abandoned amusement park, he is the only one of his kind around. That is, until Rebecca Bluegarden and her feline companion Happy arrive, unaware that they are Granbell’s first visitors in one hundred years. Their goal is to make fun videos for their B-Cube channel, but what they find instead is a friend in the socially awkward Shiki.
When Granbell becomes too dangerous for the three of them, they set off on an adventure through the Sakura Cosmos. They hope to make more interesting videos and even find the elusive goddess Mother, while Shiki wants to make more friends, spurred on by the words of his late grandfather. Of course, the journey will not be easy, as no one has seen Mother before, but Shiki is determined to reach his goal and explore the boundless reaches of space together with his new friends.
