

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!
2024

Nov 29, 2006 - 52m
Sachiko takes Yumi for a holiday in her summer home. While there, Sachiko's acquaintances make trouble for them.

Jan 31, 2007 - 52m
Lillian and Hanandera collaborate on a school festival, and Yumi tries to fix Sachiko's hatred for men.

Mar 28, 2007 - 52m
Hosokawa Kanako, a first year, sees Yumi as the ultimate embodiment of perfection. When preparations for the Hanadera Festival begins, Kanako tries to keep Yumi away from it due to her hatred of men and her fear of having Yumi be corrupted.

May 30, 2007 - 52m
Lillian's School Athletic Festival begins, and Kanako and Yumi make a bet to settle the problems which began between them last episode.

Jul 25, 2007 - 52m
The second year students go for a week's study-vacation in Italy. Yumi meets up with Shizuka Kanina while there.