This romantic comedy chronicles the life of Mirae, who has always believed that her life would be better if she were born more beautiful. After she goes under the knife, she comes out looking like the beautiful woman she has always dreamed of becoming. She feels ready to take on the world for the first time, and she falls madly in love with Seok, the perfect man. Except Seok hates people who get plastic surgery.
Gil Oh-so, an employee at a cleaning company, meets Jang Seon-gyul, the boss of the company. The two are diametric opposite when it comes to cleanliness. With the help of Oh-sol, Seon-gyul faces his mysophobia and falls in love with her.
Ko Ha-Neul dreamed of becoming a teacher, due to a teacher who helped her when she was young. Ko Ha-Neul now begins work as a temporary teacher at a private high school. While working there, she interacts with many people, including teachers Park Sung-Soon and Do Yeon-Woo. Both of whom are dedicated to their teaching jobs. Meanwhile, Ko Ha-Neul faces different problems at the school. As she works through those problems, Ko Ha-Neul grows as a person and a teacher.