The reclusive girl, Honnezakka Arumi, finds herself enrolled in a beautiful all-girls boarding school on a remote island, the private Yukibara Girls' Academy. Despite being shy and introverted, the moment Arumi steps through the school gate, she blurts out a harsh remark. Confused, she is approached by the class representative, Usajima Sumire, who appears as a rabbit and delivers an unexpected message──!? A mysterious story unfolds as the various feelings of the girls intertwine──!!