She has been secretly in love with him for ten years, but she has always insisted on "I love you, but it has nothing to do with you"; he has waited for her for five years and missed her for five years, but in the end, he was no match for "the passage of time"; he has chased her for five years and been in love with her for seven years, but in the end he still "hate to meet her too late"; when she faces the choice between first love and true love, where should she go? A story of pure love about the green years, hoping to arouse the nostalgia of our lost youth.