マリア様がみてる

When Yumi Fukuzawa entered the Lillian Girls' Academy, a prestigious all-girls Catholic school in Tokyo, she never imagined she would catch the eye of beautiful and demure Sachiko Ogasawara, one of the school's most popular students. Now Sachiko has offered to be Yumi's soeur, her "sister" and guide for all her years at the academy. The whole idea has Yumi completely flustered—after all, they hardly know each other! The entire campus is abuzz with rumors about the two of them, but Yumi is conflicted over accepting Sachiko's offer. While she admires Sachiko, being her soeur would also mean constantly being at the center of the entire school's attention!

Yumi Fukuzawa is an ordinary first year student at Lillian Girls' Academy. By chance Yumi meets second year student Sachiko Ogasawara, who is a candidate to become a Red Rose. Sachiko later offers her rosary to Yumi Fukuzawa which signifies she will become an older sister to Yumi. Meanwhile, Yumi, who already looks up to popular Sachiko, is perplexed why she is picked. A festival named "Cinderella" then approaches, which is run by the Yamayuri Council. Conflicts between the older and younger sisters soon begins ...