Yang Chi-seung

Lee Young Kook is a widower with three children. He still hasn’t gotten over the death of his wife. He decides to hire Park Dan Dan as a live-in tutor for his kids and he becomes attracted to her. Meanwhile, Park Dan Dan has bright and positive personality despite her harsh situation.

The high school senior girls discovered a 'Ghost Hide and Seek' tape recorded by their seniors in the broadcasting club. Through the tape, the girls learned about a rumor that if they win in the ghost hide and seek game on the upcoming school anniversary, they can receive a perfect score on the college entrance exam. The girls decided to recruit Min-joo, a second year student from the religious club, as a mercenary and made a decision to participate together in the ghost hide and seek.