Su Yunjin (played by Yang Zishan) and Cheng Zheng (played by Han Dongjun) are high school classmates. In the ignorant and naive high school days, the two had a faint affection for each other. However, Su Yunjin knew that her life was very different from Chen Zheng's and it was impossible to get together, so she deliberately avoided him. However, Cheng Zheng never gave up and always cared and took care of Su Yunjin silently. In the end, Su Yunjin was moved by Cheng Zheng and the two finally became a couple. After graduation, Su Yunjin and Cheng Zheng both entered the society to work hard. Su Yunjin is a workaholic who devotes most of his time to work, which makes Cheng Zheng feel very insecure. He wants to live a plain and simple life. In the end, the two people with a growing gap chose to go their separate ways. But although their bodies are separated, their hearts are still tightly connected.