In the depths of the woods resides Allen, a wizard who despises the company of others. He is known as the "Demon Lord" and his reputation strikes fear into the hearts of those nearby. Living as a solitary hermit, he stumbles upon a young girl named Charlotte who has collapsed in the forest. Despite her innocence, she has been accused of wicked acts and had her engagement terminated, causing her to flee her homeland. Upon hearing her story, Allen is reminded of his own painful betrayal by former companions. Moved by the exploitation of the 17-year-old, he decides to provide shelter for her in his mansion, and impart his knowledge of nefarious ways upon her…