Xu Duoqian has been secretly in love with his childhood sweetheart, Jin Jingrong, his next door neighbor for many years. In Jingrong's heart, he was always the best friend she had grown up with. The two had a close relationship, but she had never thought of transcending friendship. However, an accidental arrangement of fate made them a couple, and Jingrong gradually realized her deep love for Duoqian while getting along. The two fell in love with each other, entered the university campus together, and spent many good times together. But unfortunately, in the year of graduation, a sudden misunderstanding caused them to part ways. Many years later, the two met again, and Duoqian thought that as long as they explained the misunderstanding, they could get back together. However, things are unpredictable and something unexpected happened...
