Jin Seo Won is a Garam High School math teacher. He is popular with women, polite, a little bit shy, romantic and sweet in his awkwardness. And he's head over heels in love with a young literature teacher, but he’s not going to admit it, not only to her, but to himself. He would rather pretend to be uncomfortable with her or ignore her, that's how awkward he is in matters of love. Choi Yul is his nephew but no one at school knows that.