The Demon Lord is equivalent to the leader of the demon world. He is the supreme leader of the demon world, and this was only during the Warring States Period five hundred years ago. At that time, there was only one bloodline left in the demon king's imperial family. Almost all the monsters thought that she had gotten a big deal, but who knew why her family members were all dead, but she was living well? Five hundred years later, during the Warring States Period, the noble son of the Western Kingdom, who was born into an emperor's family like her, was a thousand times luckier than her. He has a god-sister in name only, but he also knows very well that this sister never has contact with him or his mother. Is this sister a blessing or a curse?