Takes part a while after Ikki accepts Simca's offer to become the new leader of Genesis. Shows the Battle between Kogarasumaru and Potemkine. The episode takes place between episodes 21 and 22 of the main series.

Three un-aired episodes included on the BD/DVD volumes. See More Info for an episode list.

An extended version of the second season's first episode, which is under the same title.

Although Yuuta Togashi and Rikka Takanashi have just started dating, they do not know how to progress their young relationship. Due to both of them being shy, neither of them are capable of making the first move. Rikka decides to ask her class representative Shinka Nibutani for some love advice, and she advises Rikka get closer to Yuuta during the Christmas season. Following the suggestion of Yuuta's friend, Makoto Isshiki, they hold a Christmas party at Sanae Dekomori’s place. During the party, Yuuta notices Rikka has gone missing and searches for her. When he finds Rikka, he notices that she is acting strange and quickly figures out that she and Sanae are both drunk! How will this Christmas party turn out for the budding couple? [Written by MAL Rewrite]