Botan Ichige has just enrolled in St. Asmaria All-Girl's School where angels are said to live. It turns out that angels do indeed live there, and after an accident, an angel named Un offers Botan her halo as a snack. After eating it, Botan discovers it had some bizarre side-effects, causing her to regularly "give birth" to colorful mushrooms. Is this the life of an angel!?
Aoi Nagisa transfers to one of the three affiliated all-girl Catholic schools on Astraea Hill, St. Miator's Girls' Academy. There, she discovers a community of fellow students entwined in an intricate hierarchy, in which two Etoiles represent the three schools. In order to fit in, Nagisa must go to class, join clubs, and make new friends. Meanwhile, Shizuma Hanazono, the sole Etoile of Astraea Hill, finds herself drawn to this new, exciting transfer student. As Shizuma and Nagisa get to know each other, Shizuma finally decides it is time to face her troubled past.
A story about the humorous misadventures of Akabane Aya, an arrogant high school girl who's constantly trying to outdo her classmates in everything (especially sex appeal), only to make a fool of herself in the process. Since the story takes place in an all-girls school, expect lots of yuri fanservice innuendos without much seriousness.
When starting at a new school, Nanako is thrust into the world of female rivalry and love. She is choosen into the Sorority, giving her an enviable postition according to all the girls left out. However, since Nanako is not from a wealthy family, most girls find it unfair that she was choosen. Nanako is left to protect herself from wicked rumors and mean plots to make her leave the school. Along with her best friend since preschool, and new friends made along the way, she uncovers the past of some of the more popular girls in school and on her journey through highschool she learns of love, loss and her own family's secrets...