Yuko and Eri are two ordinary girls who get pulled into an alternate world inhabited by tiny people. The inhabitants of this mysterious realm view them as their "Great Protectors," capable of safeguarding their land during times of conflict. The two girls embark on a mission alongside a group of village warriors to discover how they arrived there and how they might return home. However, a war is brewing, and these two Great Protectors have become political tools that every faction covets to rally the populace to their side.