In this fun, light-hearted Special episode, Miya Tachibana attempts to figure out why her weird and slightly perverted older brother (Junichi) has such a friendly relationship with many of the girls in his school, yet can't manage to find himself a girlfriend. Fearing he might become a bum later in life and lose his job, she decides to stalk him to find out if there's more to him than what she sees at home.
The episode is titled "Imouto" (Sister) and is available only on Blu-Ray in Volume 13 of the Amagami SS anime series.
According to the official website, two-volume OVA of Amagami SS will be distributed to those who purchase all the volumes of the DVD/Blu-rays of the TV series. The first volume will carry three short episodes of Haruka, Kaoru and Sae. The second volume will contain Ai, Rihoko and Tsukasa’s episodes.
Shoichi Kamita is an ordinary high school boy, who is faced with the university entrance exam and worried about his future. This campus romantic comedy, "Seiren", which means honest in Japanese, depicts his pure relationship with three different heroines. Each story is the unique and mutual memory between him and the heroine.