The 57th Expedition beyond the walls has begun, but while cut off from the main formation Armin's squad encounters something strange. Meanwhile, the Cardinal System that manages the world of Sword Art Online makes an unusual connection. When worlds collide, what will be left of the walls of humanity, or the floating castle Aincrad?

The SAO gang has decided to throw Asuna a party to celebrate her 18th birthday, and cuteness ensues. Just a short Kirsuna fluff fic I did to commemorate Asuna's birthday a couple days ago (September 30th).

When an attempt to merge the servers of ALO and SAO by the outside to free the trapped players backfires, the scores of players in ALO find themselves sharing a world with the floating castle Aincrad. Kirito, Asuna, Leafa, and the other players of the two VRMMOs will try to find out how to escape their changed world, and perhaps something more on the way.