Ph.D. candidate in Physics Mu Cheng He catches a third-year STU
dent in English Xue Tong cheating on an exam. When he becomes the substitute teacher in her elective course Russian and lets her STU
dy with him after classes, her hatred for him only grows. Over time, however, Xue Tong discovers Teacher Mu’s true character and comes to secretly love him. Xue Tong has three roommates in university, the four girls have different love stories while gaining friendship. They grow up together from school to society. After experienced many things, they all receive their exclusive memories.