On Astraea Hill stand 3 prestigious female-only academies referred to as St. Miatre, Spica, and LeRim; and though the faculties are separate, they share one campus and dormitory. Nagisa Aoi may be a 10th grader who has decided to transfer to St. Miatre’s Girls’ Academy. Though her transition has been smooth thus far , while exploring the campus Aoi inadvertently falls down a hill, sees the gorgeous Shimuza, and promptly (not to say embarrassingly) faints. Nagisa continues to ascertain Shimuza out and about, but soon discovers that she is that the “Etoile” a well respected girl within all of the faculties . With Shizuma taking a liking to the new transfer student Nagisa, secrets of Shizuma’s past will unravel over the approaching academic year.