Ciel was an Emperor, but he was nothing more than a Puppet Emperor. The Prime Minister is the real ruler of the empire. However, even though he was only a Puppet Emperor, he was still an Emperor. The daughter of the Villarreal Family, famous for turning a poor province into a prosperous one. The daughter of the Prime Minister, the flower of the capital, the symbol of a virtuous woman. General Rose, the beauty who guards the borders. Princess of the Neighboring Empire. They are all his fiancé. When the age when he must marry them arrives, something suddenly awakens: memories of his life in another world, earth. The story that was initially chaotic started to get better because of it. With his modern knowledge, he built his Empire to a new level. ... Note: A Kingdom Building and Romance Harem Novel.