Synopsis：A Physics PhD student of Donghu University, Mu Cheng He, happened to be the invigilator in a final exam. He misunderstood Xue Tong, a third-year student in English Department, had cheated in the exams. That marked the beginning of their romance. Mu Cheng He and Xue Tong's admiration for each other budded from their frequent interaction and thus developed into a love story. During Xue Tong's university life, she met three roommates: the cool and charming Zhao Xiao Tang, the active and enthusiastic Bai Lin, also the quiet and gentle Song Qi Qi. The four girls of unique personalities not only built up their friendship, they also experienced different love stories.