Overview
Yeong-nam, an exam instructor, faces challenges after a student's death due to exam stress. He embarks on a journey to teach elementary school kids despite battling cancer, highlighting struggles and triumphs in education.
| Actor | Age then | Age now | |
|---|---|---|---|
 | 51 | 51 | |
 | 57 | 57 | |
 | 59 | 59 | |
 | 53 | 53 | |
| - | - | |
| - | - | |
 | 15 | 15 | |
 | 16 | 16 | |
| - | - | |
 | 16 | 16 |