Lin Xiaochun (played by He Landou) is a freshman who has just stepped into the university campus. On the first day of registration, she met her roommate Chen Chenchen's (played by Yu Shuxin) boyfriend Gao Lin (played by Zhao Zhiwei) in the girls' dormitory. A misunderstanding caused a lot of jokes between the two. After that, Lin Xiaochun met her other three roommates one after another. It was the first time for the five girls to leave their familiar environment and live a collective life. The differences in living habits and the three views made the five girls full of friction and contradictions in their daily interactions. After a series of quarrels, they finally decided to sit down and open their hearts to have a good chat. In the end, the misunderstanding was resolved and a deep friendship was formed between the five people. In the long four years of college, the five girls experienced many important moments in their lives.