Sword Art Online Extra Edition

Sword Art Online Extra Edition (ソードアート・オンライン Extra Edition) is a special recap episode that will air on December 31, 2013 on Tokyo MX, BS11 and Niconico Douga and will feature new footage for the series. The episode will also be streamed worldwide at midnight (UTC +9) on January 1, 2014 on Crunchyroll and Daisuki. This episode will feature a new theme song called Niji no Oto.

Synopsis
To fulfill Yui's wish of seeing a whale, Kirito accepts a underwater quest, but they find out that Leafa - Suguha has a difficult time dealing with water. Therefore, Asuna and the girls start swimming training for Suguha. Meanwhile, Kirito comes in contact with someone...