When Cheol, a student enrolled at Yeong-gyu's academy, does not come out all three days, Young-kyu keeps in touch with him, demonstrating his own teaching philosophy to show something different from other teachers. However, he doesn't care about him, and Yeo-Kyu, who comes to this place, tries to persuade him to pursue him. Tae-ran and Hye-kyo, who went to the department store, start with a trivial nerve war and fight in a case. The fight between the two is endless, while being held by all kinds of people in elevators, buses, restrooms, and so on. (Source: SBS)