Xia Mu (Qiao Zhenyu) is a senior psychologist with a dual personality. He is very dull but very sultry at heart. He has a typical straight male aesthetic. He is 32 years old this year. He divorced his ex-wife and lives a single life. He is also living a retired life that is inconsistent with his age. Ouyang Xin (Tang Yixin) is another personality of Xia Mu. She is very different from Xia Mu's own personality. Her true identity has always been a mystery.