Yui wants to see a whale with Kirito during an underwater quest in Alfeim Online.
During the quest however, it is revealed Leafa cannot swim.
Asuna and the other female characters decide to train Suguha in a real-world pool to help her in ALO. Meanwhile, Kirito meets a certain someone.
Sword Art Online: Extra Edition was an 1:40 long special airing on New Year’s Eve. The first 1:20 minutes summarize the original 2012 anime. The final 20 minutes contain all new footage, effectively a special episode set in ALO.