The anime is set in Japan in 2039, 10 years after the "Apocalypse Virus" devastated the land. The story revolves around Shū Ouma, an unsociable 17-year-old second-year high school student, and a 17-year-old rival named Gai Tsutsugami who is a young "Jiikundō" pilot of a guerilla organization.
Hmm...did I mention that the Code Geass staff is behind this project also? O_O