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She is a modern gold medal killer with a cunning heart. She, the ancient princess, was timid and cowardly. Once she travels through time, she becomes her. Let's see how the situation changes and the domineering life of the stunning killer. He, the fourth prince, was dressed in white, gentle and considerate, and ruthless. He killed people invisible while talking and laughing, but he devoted all the world to her. A long-simmering battle for the right to inherit the throne for the country