During the most beautiful sixteen years of her life, Mo Yushan encountered a feeling called [heartbeat]. This is a wonderful thing that connects two people in a subtle relationship, almost as if they are separated. On the other end of this subtle connection is a boy named Lan Jiayi. She is excellent in both morals and academics; he is sunny and handsome. High school is not long, and the days are filled with all kinds of studies and exams, so Yushan really doesn't have much time to love Jiayi. Besides, she is not the one who should love him properly. The college entrance examination is over. Will the futures of Yushan and Jiayi overlap? Could he still be unaware of the deep love she had buried in her heart for two years?