Sword Art Online: Progressive - Kogane Ritsu no Kanon

Synopsis:

After reaching the sixth floor of Aincrad, Asuna and Kirito discover that the town of Stachion is home to strange puzzles that are hidden everywhere. There are plenty of intricate puzzles and mysteries ahead that call for more than just a sword to solve. The two must work together despite the overwhelming odds if they hope to escape alive. Will they be prepared for the evil forces that wait to be encountered, though, as they concentrate on facing the trials that lie ahead?