Chan-woo doesn't tolerate Mi-sun's mistake. Angry Mi-sun lies and delays her duty and plays with her friends. However, Mi-sun, who is playing with her friends, meets Chan-woo. Chan-woo tolerates Mi-sun's mistake at the hospital. Mi-sun, who had been awful before, buys lunch with thanks. Mi-sun and Chan-woo have a crush on each other and love develops. Younggyu, on the other hand, feels bad when his grandfather keeps calling him permanent. Eventually, he asks me to call him Myeong-gyu, but Grandpa is called Mangu.(Source: SBS)