Board Thread:News and Announcements/@comment-6697950-20131010173104/@comment-1173941-20131011062843

"Yup. The quest they give, is not a single nor consecutive type of quest. It is the first of a large scale mission-type quest. It will start from this floor until the ninth floor"

http://baka-tsuki.org/project/index.php?title=Sword_Art_Online:ME9