Generations have passed since the war with the Space Monsters started, and none remain who know how it began, with even records of those times being scarce. It is a lost cause, but humanity still fights against them, relying on the "Topless": a group of elite space pilots with special powers that allow them to use the Buster Machines—the last hope against the Space Monsters. Nono, a girl from a remote Martian town, h...