故事发生在20世纪90年代初。热爱文学的小青年秋水(张一山饰)无法违抗父母之命,高考之后选择进入北京仁和医学院学习。入学未久,这个聪明调皮的大男孩就相继结识了热情豪爽的毒舌女孩肖红(周冬雨饰)和美丽文静的班长赵英男(尤静茹饰)。秋水和肖红有如一对欢喜冤家,针尖对麦芒闹出不少的笑话。而大男孩不经意展露出的文学素养又引起了英男的注意。青葱岁月,几多欢歌。秋水与英男相互吸引,坠入爱河,而肖红却与大男孩不断错过,唏嘘良多。男孩女孩们的故事从未完结,他们注定要经历许多、许多……。Daonuea had a crush on Kabkluen in high school and confessed his feelings on the last day of his senior year. However, he was gently rejected by Kabkluen. Now, starting University, Daonuea discovers that one of his dormmates is none other than his High school love, Kabkleun. What will happen when you stop loving someone but they begin loving you?。