I recommend "Concubine Jue", an Eastern fantasy novel. The female protagonist would transmigrate into a three-year-old child who would smash people to death. At the same time, on the night of the full moon, she would become a sixteen-year-old hot beauty. The male protagonist was Prince Wen Ya. He used his entire life to exchange for ten years of the female protagonist's body. The two of them would be tortured and sweet, and the ending would be a happy marriage. I hope you like this fairy's recommendation. Muah ~π