How long this forest has existed, no one knows. But the little spirits who migrated here from the World of Spirits had lived harmoniously with humans, plants, and animals. But, by nature, they were weak-hearted and easily scared, and so the little spirits picked a loving and kind-hearted girl from a nearby village to protect the forest as a shaman. The girl became a friend to the beings living in the forest, serving as a bridge between them and the outside world. But recently the apostle of darkness have been spreading its evil all over the world, even possessing the little spirits and sending the balance of peace in the forest into freefall.