Heeseung was a billionaire and heir to a company; he had seven children: Jay (17), Sunghoon (17), Jake (16), Sunoo (13), Jungwon (10), and the youngest, Riki (7). Due to his work, He hired a nanny to take care of them; he was married, but gradually realized that his wife wasn't the best person and fell in love with the nanny (you).