"Here we go, Asuna! Hang on tight! Tilnel, launch!"Having said their good-byes to the mysterious elven knight Kizmel, Kirito and Asuna set their sights on the fourth floor of Aincrad. But once they open the door, they find the way forward blocked by a powerfully flowing river. The updated version of the fourth floor has been changed into a water world! When they finally arrive at the floor's town, they're greeted by chalk-white streets and...