Board Thread:General Discussion/@comment-1173941-20130611084051/@comment-6697950-20130613173948

"Titled “The Day After”, the novella takes place in the month of June, the same as the release date, and will feature the stars Kirito and Asuna, as well as “one more person”."

http://sgcafe.com/2013/05/sword-art-online-exclusive-novella-final-bddvd/