My Sassy Girl is a South Korean romantic film directed by Kwak Jae-yong, in which the lead protagonist's chance meeting with a drunk girl on the train changes his life. It is based on the true story told in a series of love letters written by Kim Ho-sik, a man who initially posted them on the Internet and later adapted them into a novel. The film was extremely successful in South Korea. When My Sassy Girl was released throughout East Asia, it became a mega blockbuster hit in the entire region, from Japan, China, Taiwan, Hong Kong, Singapore as well as South East Asia, to the point where it was drawing comparisons to Titanic.