Aoki is a young boy living in rural Japan who, upon hiding deep in the forest from his school bullies, discovers a portal there within that takes him to another world...a world where nature remains untouched and dominating, where giant beasts give birth to magnificent races, and where he too will become a part of its moss-laden woods, its aching violet ocean, and its cold, black-sand deserts, to save this alien land from a darkness penetrating its very core...