Crow green is the national color of Darong, and it is also the symbol of the emperor of Darong. Crow green is the least warm color, but it is the mark of the world's supreme. Yun Xuanxi, the crown prince of Darong Mingde, was given the courtesy name Xihe and nicknamed Dongjun. Being deeply in love with someone you can't love, and being deeply tortured by it. Yun Bingyao, Princess Darong Yueyi, Yun Xuanxi's sister, nicknamed Qin Jing. A person who becomes crazy for love little by little and is separated from love. Shui Sanqian, a great historian, inherited her father's business and disguised herself as a man. She mistakenly believed that Lou Hen was as good as Long Yang, so she alienated Lou Hen. Lou Hen, Yun Xuanxi's close friend, was deeply in love with Shui Sanqian, who was disguised as a man. Due to a misunderstanding, they could only be close to Shui Sanqian but not fall in love with each other for the rest of their lives.