Kio Kakazu's life takes a space-aimed turn when Eris, a captain of an alien race, comes to Earth on a mission to establish connections between humans and her people, the Catians. Together with Kio's childhood friend Manami, teleport-capable Aoi and a team of cute capable robots, they face off against fanatical alien worshipers and a mysterious government agency, as well as the Catians' biggest enemy.