In the year 2038, Yuuma Sawatari is a student who adores all things related to the cosmos and stargazing. He felt thrilled when his parents purchased a robot named Nanako, yet he was let down upon discovering that she functioned merely as a helper. Still, when he eventually attempts to discuss astronomy with her, an odd event unfolds. Her software malfunctions and is commandeered by a stranded extraterrestrial vessel claiming to be trapped in space! The alien craft begs Yuuma"s assistance to return to the heavens.
