Bara Monogatari Petite Soeur

A series of Maria-sama ga Miteru comic anthologies published by Noir Shuppan featuring short stories from a number of different contributors. (Artist information for all four volumes can be found under "More Info")

The second volume has been translated by Lililicious and contains a number of short stories:

"Treasure" (Hirota Kaoru); a discussion between Youko and Yumi that offers a glimpse at the traditions between soeurs and their rosaries
"Canon" (Hane); when Yumi is feeling depressed, Sachiko takes some time out to comfort her.
"Finder" (Yuuki Kagura); emotions captured on camera give Tsutako an excuse to speak with Shouko
"Guidance Counselling" (Suzumiya Kiriha); after seeing Yumi talking...