Lin Yiting, a top-notch girl, and He Qingmu, an artistic boy, met through a campus micro-movie, and their "happy enemies" began a joyful and turbulent chapter. The shadow of the ex-boyfriend and ex-girlfriend makes the relationship between the two unable to be established. Lin Yiting mustered up the courage to pursue He Qingmu, but was not accepted by He Qingmu's group of art students. Yiting became the object of ridicule, which also made He Qingmu very embarrassed. At the end of his freshman year, He Qingmu chose to drop out and decided to pursue his ideal of the Academy of Fine Arts, along with two years of repeat studies. Lin Yiting's life at school was not peaceful either. He faced difficulties in pursuing his postgraduate ideals, and his friends around him were alienated, separated, and close friends. For two years, Lin Yiting has been waiting for He Qingmu, and the spark of pursuing his ideal has made the two of them cherish each other. He Qingmu said: "I will become a better person for you. I will definitely come back to find you." Two years later, He Qingmu realized his ideal, but everything in the past has changed... The bright colors on the picture have become colder and darker, and they will never be seen again.