Sae Nakata Side Story (中多紗江編 Nakata Sae-hen) is the 3rd short OVA of the Amagami SS anime series.
A few weeks before Christmas, Junichi is left depressed as it his birthday, but everyone has left him alone. Just then Sae pays him a visit to wish him a happy birthday and give him a present. Junichi invites her in, and is left awestruck by Sae's present, an album full of pictures of her in various cosplay outfits. When Junichi asks why Sae chose such a present, she says Miya told her what Junichi liked so she did it to make him happy. The two are left greatly embarrassed, but Junichi thanks Sae for the present and the two then enjoy a walk outside together.