Yu Zhouhao (Keon-hyeong Park) was born in a family that has been engaged in teaching for generations. However, he does not like to be bound by rules. He lives a life of luxury every day and squanders his grandfather's wealth. His grandfather couldn't stand Zhou Hao's decadent life, so he forced Zhou Hao to teach for two years on the condition that he would stop his credit card and donate all his inheritance to society. In order to cope with his grandfather's wish, Zhou Hao had no choice but to give in and came to the middle school to serve as the head teacher of Class 2, Grade 2. However, he often came to school late and left early, and did not participate in the psychological counseling of students. The turning point was that he met Yin Xiaozhu (Hyo-jin Kim), who was a second-grade instructor and wanted to correct Zhou Hao's rogue behavior, forcing him to take care of the evening self-study and look for students who ran away from home with her. Zhou Hao wanted to escape the responsibility of a teacher, and during the days of chasing and hiding, the two gradually fell in love. As Zhou Hao gradually grew up, he gradually developed feelings for this job. His sense of responsibility as a teacher made him show unprecedented justice when facing the incident of his student Hengjun being expelled from school...