Kaoru Tanamachi Side Story (棚町薫編 Tanamachi Kaoru-hen) is the 2nd short OVA of the Amagami SS anime series.
On the way home from school, Junichi runs into Kaoru selling Christmas cakes, which she explains is another one of her part-time jobs. Kaoru catches Junichi staring at her in her Santa dress, so as punishment she gets him to help her out. After selling all the cakes, both decide to ask the other what to do for their upcoming Christmas date, but ultimately neither one does, out of embarrassment. Kaoru thanks Junichi for his help and tells him to look forward to Christmas, to which he agrees.