Aoi Nagisa<span> is a first year high school student who has been sent to the Astraea Dormitory after her parents are transfered abroad. The dormitory houses girls from three different girls schools: St. Spica's Academy, St. Le Rim Girl's School and St. Miatre Girls Academy.</span> <span>There she meets the representative of the three girls schools, </span>Hanazono Shizuma<span>, also know as the Etoile, she is beloved by all the students at all the schools. The two of them have an interesting first encounter and Hanazono seems to take a instant liking for Aoi.</span>