Maria-sama ga Miteru 4th
Life goes on for the ladies in the Yamayurikai. On the one-year anniversary of Sachiko and Yumi becoming soeurs, Yumi receives a difficult task from Sachiko: to finally acknowledge someone as her younger sister.
The 4th season of the anime based on the light novel series by Oyuki Konno.
Info: TV Series, 13 episodes, on air from 03.01.2009 till 28.03.2009