Three the Hard Way

General storyline: Many years ago, a mysterious group of monsters called "Kaibutsu" appeared in Durham Kingdom and ravaged the land. No one was able to resist their power, that is, until a hero named Carolus emerged. He was able to defeat the Kaibutsu leader, who happened to be his sister, and save the nation. After this, the people made him their king. However, 65 years have passed since his victory, and gradually, as he has aged, he has surrendered more of his political power to his vassal duk...