The story takes place in a famous university in the south of the Yangtze River. From the university campus to entering the society, Xu Jie, a beautiful young girl from a privileged family, was forced to break up with Yu Ming, a gentle man from a scholarly family. Although Yu Ming had many doubts, he could only respect Xu Jie's decision in the end, and did not even know the truth about the breakup. In Yu Ming's view, Xu Jie owed him only one reasonable explanation for the breakup. So, Yu Ming waited for this explanation for 11 years, while Xu Jie and he were separated from each other, suffering all kinds of grievances and lovesickness, but they suffered from the promise they made back then and gritted their teeth without saying a word to anyone. 11 Years later, we met in a different place, met in the crowd, simple greetings, and a short stay, but the misunderstanding became deeper. Seeing that the situation was already in despair, the roommate who shared the same dormitory broke the deadlock, and the two faced each other again. Xu Jie's grievances, Yu Ming's waiting, and their lovesickness were traced back to the past one by one. What remained unchanged was the infatuation. However, despite the changes of 11 years, the obstacles of worldliness and family are still insurmountable. The beautiful and infatuated Xu Jie and the elegant and gentle Yu Ming are wavering in family affection and love. Can the seemingly weak love combination overcome the strong obstacles of their parents?