An asteroid collision brought with it a deadly menace known as "Shinobi." Faced with destruction, humanity retreated to land reclaimed from the sea....
13 years ago, suddenly one part of Tokyo broke off and began to float in the sky. Tokyo was separated into "Old Tokyo" as the part that was floating...
A treasure-hunting mastermind assembles a team for a life-changing adventure. But to outwit and outrun threats at every turn, he'll need someone even...
