Su Feifei, who had just graduated from college and took the college entrance examination, was appointed as the head teacher of Class 18 of Yucai Middle School. She managed the class in an orderly manner and got along well with the students. She was affectionately called "Sister Fei" by the students. After school in spring, she saw three troublesome students in the class getting into a conflict with others at the school gate. Wearing a high school uniform, she stepped forward to stop the conflict, but was insulted instead. The student nurse's concern caused a scuffle, and Li Qingyuan, who was passing by, took action to calm down the incident. Su Fei mistook the other party as a "hooligan" who was chatting with students. He not only lied about being a repeat student and fled in a hurry, but also used it as a negative case to warn students in the class meeting. Rumors spread all over the campus. After that, she frequently bumped into Li Qingyuan, who had outstanding temperament, and went from being cautious and avoiding to being secretly moved. After the college entrance examination ended three months later, Li Qingyuan confessed his love with flowers, and the misunderstanding was solved: he had already fallen in love at first sight with the brave Su Fei, and was waiting for her to "graduate." After learning that she was a teacher, the two confessed their feelings. Li Qingyuan, who was born in a military academy, and Su Feier, an upright and gentle person, quickly fell in love and started a happy life of starting a career and starting a family.