The world continues as nothing special happened, people smiled and others screamed— some suffered and some prospered but unknown to most, a strange war happened that slowly broke to the surface.  A series of portals appeared across Japan but no one really knows how it happened or when it began. People in masks with strange abilities began fighting and when a young student found himself on a rooftop with the Black Shard, he found himself in a conflict he didn't understand and wasn't sure if he could survive.