White Swamp summary:

Six years ago, a novelist named Jeong Seon lost his young son and divorced his wife. He meets the orphan Hyunwoo by chance in a rural village where he went to work as a instructor, and they become close. However, Hyunwoo leaves home without saying goodbye just before he becomes an adult, and two years later, he suddenly returns and reveals that he has become a stage actor"Mister, is there any reason why I shouldn't do this?"