After failing in the college entrance examination, Su Mo went to school A to repeat his studies. He accidentally met Yan Yisi, who was also repeating his studies, and fell in love with this tall and handsome boy at first sight. In the end, he found out that the two were in the same class. During the study process, the two gradually developed a tacit understanding. However, their romance was not allowed in their senior year of high school. After a failed test, Yan Yisi chose to leave Su Mo for her future. At this time, Su Mo discovered that there was a pair of eyes that had been silently watching and caring for her. Faced with the departure of her lover and Mu Pei's confession, how should she choose? Is there any unknown secret behind Yan Yisi's departure...