Kurumi Mirumati appeared from the wreckage of a plane crash without any memories of her past. Nonetheless, these circumstances wont stop her from living a cheerful life.One day, Kurumi began to hear strange voices in her head. They promise to show her a world of wonders and unveil the mysteries of her past. Kurumi trusts her happy-go-lucky attitude and her reliable young friends to guide her on this fantastic adventure!