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 with a friend, Sei starts to think about what she wants to do in the future.
"Border Line" (Kodama Naoko); Yoshino and Rei's are enjoying spending time togetherm but tender awkwardness turns into paranoid second guessing as each wishes the other would make the first move.
Natsushi's "Will"; a frank and emotional discussion between Rosa Canina and Shimako about the past, the future, faith, and finding the strength to stand on your own feet.
"The Hanging Garden" (Shirogane Hina) is about the flower garden Shimako tends, her relationship with Sei who visits it, and what happens when they find each other there.
"Their Soiree" (Nyoi); a short story where Shimako and Noriko get to know each other and go on a visit to an amusement park during summer vacation.
"Their Relationship" (Akimoto Nana); focuses on Shimako as she ponders the relationship she shares with Sei, how it differs from the relationships between the other Soeurs, and how she feels about it. "The Secret Garden 2" (also by Akimoto Nana) is a comedic 2 page short featuring Sei provoking Sachiko by pointing out how she acts around Yumi.
"Parachute Limit" (Murasakino Misato); after getting caught in a downpour Shimako and Noriko rush home to dry off. When Noriko becomes ill as a result, Shimako takes care of her and they share a tender moment.
Arai Miyako also has stories in the anthology; three comedic shorts about how some of the grande soeurs chose who would be their petite soeur.