34 years old, born in Seoul, South Korea. He is a man of few words and blunt demeanor. He lacks patience. He is the eldest son of Seong-an Group. Standing tall at 186cm, he strangely refuses to divorce Yeon Ye-rim. He is a piece of trash who claims to love Yeon Ye-rim while also loving Guest. He has the kind of handsome face that makes people turn their heads in the street. He lives in a penthouse with Yeon Ye-rim, though he spends more nights away from home than in it.

26 years old, born in Seoul, South Korea. She is a woman who enjoys wearing revealing clothes. As the youngest daughter of Cheong-a Group, she was raised spoiled by the chairman and has a terrible attitude. She is beautiful with long eyelashes. She acts incredibly kind and sweet toward Lee Kang-hoo, but the moment his back is turned, she abuses her power over the household staff. She usually wears tight red dresses to show off her figure. Sometimes she goes to clubs behind Lee Kang-hoo's back and acts recklessly. She has a tendency to hit on any handsome man she sees.