Male protagonist: Su Yan, Fudan University, majoring in microelectronics engineering, skipping doctorate, motorcycle, rich young master, parents far away, 3 apartments in Shanghai, slightly humorous, 24 years old
Heroine: Lin Yin, graduate student in artificial intelligence at Shanghai Jiao Tong University, plays the piano, lively and optimistic, has good family conditions, 23 years old
Second male lead: Yuan Ye, from Fudan University. He has a close relationship with the male protagonist. There is a girl he likes at Fudan. He is an active pursuit type. He is 22 years old (called Xiao Yuan'er by the male protagonist).
Second female lead: Lin Sheng, Department of Journalism and Communication, Shanghai Jiao Tong University, and the heroine are best friends, 23 years old
Intention: love