Perhaps for many people, youth is just teachers, classmates and parents who nag endlessly all day long. What's more, there are endless classes, endless homework, and exams that can't be avoided. But for Lin Xi, her youth is not all about homework, classes and exams. Her youth is him, and he is the whole of her youth. Her first experience of holding hands and hugging the opposite sex... Was all related to a man named Mo Zeyi. The story between them is very long...