In a remote frontier land, far from the royal capital, resided a castle lord known as "Lord Wolf."

He is said to be a frightening individual with a fearsome face and sharp, wolf-like eyes, intimidating anyone who attempts to approach him.

Indeed, the knights and servants who serve the castle and come to town for supplies often remark that he is "a very strict and fearsome man."

Rio, our protagonist, repeatedly encounters this castle lord in various places, and eventually, for some inexplicable reason, finds herself taken to his castle.

Rio is traveling alone, but it appears there's a complex reason behind her journey…