A promising pianist in a slump has a chance meeting with a young woman playing mysterious music, and the encounter forces him to make a once-in-a-lifetime choice.
| Actor | Role |
|---|---|
 Doh Kyung-sooYu-jun | Yu-jun |
 Won Jin-ahJung-a | Jung-a |
 Shin Ye-eunIn-hee | In-hee |
 Bae Sung-wooSeung-ho | Seung-ho |
 Ahn Seung-gyunKyeong-bong | Kyeong-bong |
 Kang Mal-geumMin-sook | Min-sook |
 Kang Kyung-hunYeon-seo | Yeon-seo |
 Kim Kyu-seonProfessor of Western Music History | Professor of Western Music History |
 Im Sung-jaeGo-tae | Go-tae |
 Kong Hyun-jiConductor | Conductor |
 Bang Ye-inIn-hee's Friend 2 | In-hee's Friend 2 |
 Seo Ju-hyeongAssistant Instructor | Assistant Instructor |