Synopsis: Maousama no Yuusha Toubatsuki

For 1,000 years, the human race suffered under the oppressive reign of the Demon King, whose power extended over all demons. With the end of the human era, the demon's era began. Lucifer inherited the title of Demon King from his father but differed from him in his reluctance to engage in conflict with humans. Additionally, he was sickened by violence and bloodshed. Despite knowing that his castle was a well-known location, the constant threat of assassination motivated him to live in seclusion in the wilderness. However, his peaceful existence was disrupted when a girl was sent to defeat him, as all other powerful men had been defeated. How will Lucifer navigate the challenge of this beautiful but dangerous opponent?