Expelled from Paradise (Light Novel)

The story takes place in the future when humanity's new paradise, the cyber universe "DEVA's" mainframe is hacked by a mysterious hacker from Earth. DEVA's high officials dispatched Angela Balzac, a DEVA system security officer, down to the Earth's surface to investigate the situations srrounding this mysterious hacker. What are the hacker's motives? Angela descends on to the devestated surface riding her exoskeletal powered suit Arhan.