The film is based on a true story told in a series of blog posts written by Kim Ho-sik , who later adapted them into a fictional novel. The film was very successful in South Korea, where it was the highest-grossing comedy of all time,  and one of the top five highest-grossing films ever at the time. The film's success in Asia drew comparisons to Titanic. My Sassy Girl sparked an international breakthrough for Korean cinema , and it played a key role in the spread of the Korean Wave. The film has spawned an international media franchise , consisting of film remakes and television adaptations in different countries as well as a sequel. The film tells the love story of a male engineering college student, Gyeon-woo, and "the Girl" who is never named in the movie. Gyeon-woo just cannot seem to catch a romantic break.