I Remember Not Loving You Then

She is a cold-tempered person and is unwilling to give up her heart; He is free and bold, as if all he loves is love and has nothing to do with her; But why does my heart still hurt when I see that my efforts are not rewarded? How should she look back when she suddenly found herself trapped in it? With the graduation of senior high school approaching, how should two people with huge differences protect their love? Just as she expected, they would never see each other again. I'm really confused about the ending, so watch the extras!