What you don't know is that there has always been a little girl living in Su Jing's heart, a pretentious and innocent little girl. It was fate when she met Yu Tao. The depth of first love and worries about gains and losses made the little girl lose herself in love for the first time. The reunion after the breakup made the two of them re-examine this relationship. Is it love or fate or is it a sadomasochism that has been entangled in the end but has no results? What you don't know is that in love, a girl's little emotions can't be fully understood by the other party. What you don't know is that I miss you so much in those days when you are not here. What you don't know is that I want to stay with you forever, but I haven't been able to say it. What you don't know is that I have always loved you.