Nagisa Aoi starts her new school year as a transfer student at St. Miator's Girls Academy, one of Astraea Hill's three prominent all-girls schools. Nagisa gets lost on her first day and meets a strange student whose elegance and charisma are so alluring that she finds herself in the hospital. Tamao Suzumi, Nagisa's roommate, is there to welcome her as she wakes up, eagerly introducing her to college life and social structure. Most importantly, Tamao informs Nagisa of the presence of one excellent student representative from each of the three schools—the Etoile, or "star." Excited to meet this person, Nagisa discovers that the ethereal beauty she met earlier, Shizuma Hanazono, is the one and only Etoile herself! Furthermore, Shizuma appears to be overtly fascinated in