Siren is the absolute queen who administers the state of lakeside park city, which boasts a 99.9% safety and happiness rating. One day, one of the Ondine, the information terminals born from her, gets lost and helped by an uncouth boy named Len Kinami. Ondine feels a wamrth from Len, who complains as he pulls her hand along, but that emotion flows in to the queen, who becomes bewildered by the unknown feeling......!?