Children in the world are sentimental and sad, and they go their separate ways after graduating from high school. The carefree eldest lady Ren Yingying, the clever and quirky little princess Mu Jianping, and the quiet and gentle chivalrous girl Zhou Zhiruo are laughing their way into the campus world with a smile! Whether you are a senior in high school, a university, or a normal college with an imbalanced male-female ratio, whoever you meet, you meet that world - your own unique world!