Even Though I'm Just a Young Master from a Noble Family, I Need to Conquer the Hero's Followers for the Sake of World Peace (Associated Names)

A man who was playing a game in Japan, dies of cardiac arrest. In the brink of death, he was requested a favor by the Goddess of the eroge he was playing. “After defeating The Great Demonic Lord, please save the world from the tyranny of the Hero.” With his knowledge of the current era…