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In front of people, she was a famous medical genius, but behind people, she was a leader in the world of metaphysics. She was proficient in catching ghosts, exorcising ghosts, and drawing talismans. In front of others, "he" is a glamorous royal son, but behind the scenes, "he" is the target of everyone's bullying. By accident, she became "him". An agreement was made that she would take back everything for "him" and "he" would become her slave. ... When we first met, he was a high-ranking young national master, and she was a good-for-nothing kid. When they met again, she tricked him and he hated her. When we met three times, he was the aloof and relegated imperial master, and she was the arrogant and talented alchemist. ... I don't know since when, his heart has fallen on her, and every move she makes pulls his mind. Xi Jinyue was going crazy. Why was the cold and ruthless man in the eyes of outsiders so indescribable to her?

This is a palace romance story, with the all-powerful Butterfly Immortal and the promise of two lives, bringing out the fascinating things in the troubled world. Whose sky is it, the wind and cloud sophistry?