At certain points in time and space, many fun worlds exist. Each world was created by a smart little fairy named Navi for the sake of the sleeping princess with nothing to do. A world where you're able to experience a lively school life. A world where you can see the skies crowded with airplanes. A world that has fallen to ruin from endless wars... It's time for the sleeping princess to wake up and start her adventures in those worlds. Source: The Publisher Website.