The series "Leobeulli Horeobeulli" is a romantic fantasy drama about a boy and a girl whose destinies are mysteriously intertwined. What is good for one of them is literally deadly for the other. As soon as Philip Yoo finds a girl, Chi Yul-sun inevitably breaks up with the boy. Whenever he falls ill, she recovers. And if he starts to succeed in his career, she inevitably loses her job. But one day, this strange couple meets in person for the first time.