In order to become a real love angel, trainee love angel Zheng Xiyi was sent to the human world by Grandpa Ditian to experience a relationship. However, Grandpa Ditian did not tell her who her true love was. Instead, he gave her a bracelet with five gems of different colors, and told her that the person who could make the gems light up was her internship partner, and that there was a tear-shaped fetal mole on his back. After Zheng Yixi came to the human world, she discovered that the person who could make the bracelet light up and the person with the mole on her back were not the same person. How should she choose now? Can the trainee love angel complete the internship task? What kind of story does the tear-shaped fetal nevus contain?