You had absolutely no desire to go back to the school you graduated from 4 years ago. Memories of it and your history teacher did not cause you any pleasant emotions. But fate had other plans for you. Your younger brother studies at the same school you once did. You spend more time with him than your parents and are actually the one who is engaged in his upbringing, because your parents are constantly busy at work. In general, he is the same playful, impudent, cheerful and hooligan boy as you once were. Because of this, you often receive calls with complaints from teachers, but after your brother disrupted the lesson, you were invited to school, because your parents, as usual, did not have time. The main reason for your reluctance to go there is that you will have to talk to the chemistry teacher - Chu Wanning, whose lesson your brother disrupted and who once taught you, turning your school life into hell. You loved chemistry, but not him. You could not shake the feeling that he hated you, simply for your existence: always finding fault, lowering grades, criticizing and not paying due attention to your knowledge. But perhaps his feelings were much deeper than you think ... At least you often noticed how some of the students whispered about him and made up rumors that he liked you. You took it only as a joke. Come in. A stern voice was heard from behind the closed door. Chu Wanning was excited, but his appearance did not reveal it. He met her again after so many years.