My Sons will tell story about marriage and divorce.
 Myun Se Bin (Three Sisters) plays Sung I Nok, a widow in her 30s who will make romance with a new man in her life, Yoo Hyun Gi.
 Yoo Hyun Gi’s character will be played by 42-year-old Lee Sung Jae. - koreanvibe

Na Mun-hee (Padam Padam) and Park In-hwan (Only You) play Mom and Dad to three sons. Eldest son will be played by Lee Sung-jae (Poseidon), a dentist and a single dad who raises a daughter on his own. Myung Se-bin (Goong S) will be his love interest, and she plays a widow who also has a daughter.  -dramabeans