Episode 13, included in the final volume of the BD/DVD.<br><br> Taking place directly after the events of <i>Chuunibyou demo Koi ga Shitai!</i>, Christmas is coming up and Rikka is told by Nibutani that this is an opportunity for her to get closer to Yuuta. Under Makoto's suggestion, they plan a Christmas party at Sanae's Mansion.