Once in a Summer (Hangul) is a 2006 South Korean melodrama/romance film directed by Jo Keun-shik. The film stars Lee Byung-hun and Soo Ae. It won Best Film and Best Director (for Jo) at the 15th Chunsa Film Art Awards in 2007.

An assistant producer promises to have her reserved, but renowned professor, appear on a television series. The show involves locating long-lost loved ones from their past. At first hesitant, his story takes them back to 1969 when Korea was in chaos.—gptanagi