Su Nian, a freshman from the Fine Arts Department from a small southern town, broke into a strange campus with his paintbrush and social skills, but on the camphor road at the end of summer, he crashed into the world of Lu Xingyan, a senior in the Computer Department. He is as cold as the moonlight, but always leaves a warm lamp for her in every detail; she is as sensitive as the morning light, secretly collecting his figure with drawing paper. From sitting next to each other in the library to late at night in the studio, from clumsy temptation to running in both directions, this heartbeat that started on campus will eventually spread through the four seasons and become the sweetest footnote for the rest of my life.