Aoi Nagisa is a new transfer student to St. Miatre, one of three all-girl academies on Astraea Hill. She finds herself lost on the first day, and runs into Hanazono Shizuma, a beautiful and highly respected senior among the students. Shizuma kindly offers her help, while Nagisa is stunned into silence by her beauty. This is the beginning of a highly enjoyable and romantic shoujo-ai story, with many colorful characters adding spice to the story with their adorable antics.