Song Ling liked Xiao Qingyu. She thought she could pretend to be good, but she couldn't hide it from her heart. As long as her heart was still beating, she would never forget him. Xiao Qingyu liked Song Ling, secretly but passionately. He thought she hated him and gradually stayed away. Song Ling hid her love in her heart and wrote it in her diary. No one knew about it. When Xiao Qingyu wanted to get close to her again, he couldn't find her. He didn't know what to do except search and wait for the rest of his life. One dared not fall in love, but the other had no time to confess. The two missed ten years by mistake and met again... Even though things have changed and people have changed, their hearts remain the same...