Xiao Guiyun and Xiao Zhongyi, a brother and sister who are only one year apart, grew up together as childhood sweethearts and lived a happy life. Xiao Guiyun was the unexpected adopted son of Xiao Zhongyi's parents. After the high school entrance examination, they were admitted to a key high school in the city and studied together. At that time, they had already developed a secret love and established a relationship. They planned to go to college together, go to work, and then get married. However, earth-shaking changes occurred after entering college.
Purpose: the end of the year