Yeo-sun, a high school student who disappeared after making a mistake at a piano contest in the past, suddenly makes a comeback. Her own piano style is her way of showdown.
| Actor | Role |
|---|---|
 Jeon Su-jiYeo-sun | Yeo-sun |
| PPark Sun HyeStudent | Student |
| JJo HanaStudent | Student |
 Han Ye-riStudent | Student |
 Kim BoraExaminer | Examiner |