In the large animal park named Japari Park, animals have lived in the shape of human girls by the power of mysterious substances called Sandstar. However, Japari Park has started to dilapidate from time unknown. One day, a human child of amnesia gets lost in Japari Park. The child goes on a journey to find the child's way home with the help of animal girls, and they learn why Japari Park was dilapidated during their journey.