The Princess Is Beautiful but She Is Also Fierce

She was once the master of the world, assisting the young emperor to ascend the throne, and wielding power over the government and the public. However, she died because of her great achievements and her master was murdered. She was buried with the country destroyed before her death. He is a powerful king from another world, cold-hearted and ruthless, and holds the most power in the world. She used him to solve the problem, but it was difficult to escape. "The country can be destroyed, the world can be destroyed, but you are the only one I will never let go of!"