Overview
On-yoo is an adult childhood cancer survivor. When he's not practicing with his boy band, Oh-yoo often volunteers at the hospital's pediatric cancer ward. One day, he recognizes the familiar face of an overdose patient.
| Actor | Age then | Age now | |
|---|---|---|---|
 | 33 | 45 | |
 | 35 | 47 | |
 | 40 | 52 | |
 | 26 | 38 | |
 | 55 | 67 | |
 | 30 | 42 | |
 | 10 | 22 | |
 | 57 | 68 |