Kananase Yu is just an ordinary high-school student. Since he has mysterious inside knowledge about piloting a mecha, he is recruited by the International Military Organization as a potential test pil...read more.
The year is 20XX. Mysterious huge robots called "Giant Robo (GR)" started to appear all over the world and destroy cities. The earth was covered with fear. And their next target is Japan! The hero of...read more.
Sequel to the madcap Guardian Hearts OVA series, continuing with Kazuya's misadventures.