Chaebol family story drama , rich guy poor girl story, secret birth Lee Joon as Kim Daehee Jung Somin as Yoo Ji Ae Irene RV as Lee Sarang Kang Daniel as Kang Daniel Kim Daehee and Yoo Ji Ae were changed from birth, the first son to a rich conglomerate company was supposed to be a daughter, but it was a secret never known to anyone except for the mother, whom changed her newborn daughter to a son