Just before summer break in her senior year, Shen Zhixia is preparing to transfer schools. After being placed in a new class in her sophomore year, she grows closer and closer to Xu Shian, who has quietly watched over her all along. They draw near through countless everyday moments, then drift apart amid her family's upheaval and the truth behind their separation. Only when they reunite years later can they finally say the words of affection they never got to speak.