How to Keep My Love (2004)

Hyun Ju is a 29-year-old woman who believes that she has nothing to show for herself, except a successful relationship with her boyfriend. One day, her boyfriend So Hoon, who is sweet and gentle, goes to a department store to shop for her and ends up stuck in a broken elevator with the famous, gorgeous movie star Da Young, who is soon attracted to him for his easygoing and down-to-earth personality.