One day a girl named Ao opens a package left at the threshold of her house and discovers inside a miniature combat android model called "Frame Arms" Gooray. The Gooray, being a new prototype, can move independently of its owner and possesses advanced artificial intelligence that allows it to have its own personality. Now Ao, who knows nothing about the "Frame Arms Girls," and Gooray, who is studying both emotions and the data necessary for upcoming battles, are forced to live together under one roof.
