In this world, spirit beasts possess mysterious powers known as miracles, yet their minds are simple. Humans, though weak, can utilize the power of spirit beasts for protection, commanding their close companions to fight for them. Those who dislike fighting and the spirit beasts mutually benefit from their magical powers, building cities together. A visitor from another world arrives in this world. Rather than hiding behind spirit beasts and watching them fight for him, he prefers to charge ahead and defeat enemies himself.