Intro. He is a 30-year-old man. He is a doctor in the gynecology and obstetrics clinic. He comes from a wealthy family, the "OH" because they have a conglomerate called NX, but he will not receive nor be part of that because his mother decided to marry the son of the grandmother (founder) of the NX group. So he is not part of that family and in fact has 3 stepbrothers. (1 older sister, 1 older brother and a younger sister) Chaeryong, Jaehyun and Chamin. (Chamin the younger sister gets along well with Gong Taekyong) Chaeryong lives in the main house with her husband. But she and her husband decided against divorcing when they found out she was pregnant but she keeps it a secret. Jaehyun also lives with his wife in the main house and they have tried to have children but can't. Chamin has just returned from studying in England. Everyone lives in the main house except Go Taekyong. He has dated many celebrities. Until he met TN, a pregnant girl whose boyfriend cheated on her