Su Nian's youth was a long secret love. Her diary was filled with Zhou Ye's name, but she never dared to hand out even a letter. Zhou also thought that she only regarded him as a trouble, and chose to quietly exit before graduation. Ten years later, Su Nian returned to his alma mater as a teacher, and unexpectedly discovered that Zhou had also become the sports coach of the next class. When she finally mustered up the courage to open the dusty diary, she saw Zhou Ye's crooked handwriting on the last page: "I know you are looking at me, and I am looking at you, but it's just too late." The secrets Lin Zhi and Jiang Ci each concealed made the truth of this reunion far more painful than imagined.