Violence Jack: Post-Apocalyptic America

As scientists discovered that all fault lines will activate, causing the total destruction of America, the Government just decided to just go on with their daily lives. But when the fault lines shift, causing massive earthquakes across the country, all hell breaks loose, leaving only a few survivors in every state to witness people they don't know to claim America as its territory. Now a Japanese schoolgirl on a field trip in America to work with a devil with human intelligence who's branded a "traitor to his kind," locate other survivors, and locate one of the Colonies to escape the fate of America.