Park Shin-hye
A digital album was released on September 7, 2010 which featured two songs recorded by the movie's four stars, along with respective accompanying music videos. The song "당신이었군요" (It Was You) was a light ballad by Park Shin-hye and Lee Min-jung. While Uhm Tae-woong and Choi Daniel's duet "청계산 가버렸네" (I went to Cheonggyesan Mountain) had a more fun, upbeat sound.