Gao Yang did not get along with his father Gao Bin since young, despite being brought up solely by him. Gao Yang is a rebellious kid, often skipping school and testing the limits of his teachers. Although the daughter of the principal Jin Beibei likes him, he does not return her feelings and instead chases after the school's belle. He was disappointed when the belle suddenly announces that she is transferring schools to Beijing. However, his depressed feeling does not last long when his friends tell him that a beauty named Ye Xiaowen is transferring to their school. Gao Yang secretly head to the office to take a look at "Ye Xiaowen", and was indeed not disappointed by her appearance. However later, the Ye Xiaowen who walked into the class turned out to be a guy. It turned out to be a misunderstanding, as the "beauty" that Gao Yang saw in the office is Mi Jia, another transfer student in the next class. Gao Yang was disappointed, and adding on to his misery, the Ye Xiaowen who is now his deskmate turns out to be a weirdo. Not only does he refuse to say anything about his past, he is also adamant about chasing seats with Gao Yang so he could seat on the outer side. However, Ye Xiaowen is extremely well-liked and immediately earned the attention of their teacher, as well as Gao Yang's new crush Mi Jia. Gao Yang, who was the center of attention of the teachers since young, was extremely upset about this fact. He decided to challenge Ye Xiaowen in PE class, but was instead defeated by him. Gao Yang decided that he and Ye Xiaowen would be "irreconcilable rivals" from then on. However when he returned home after school, he was shocked to see Ye Xiaowen cooking at his house! Gao Bin then tells him a shocking thing - Ye Xiaowen would be living together with them. From that moment, a chaotic and comedic "co-habitation" life begins...