Youth is a required course that everyone must experience, whether it is dull or surprising. There is always such a tender love in youth, and the person in love makes us unforgettable. Many years later, when they met again, Bai Yusheng asked Cheng Xiaomo: "If I had not given up on you, we would be very happy now, right?" Xiaomo just smiled lightly and said: "In my youth, I met you and experienced an unforgettable love. I feel that I am very lucky; I am very happy to have him by my side throughout the years."