Overview
Soo-hyun comes across magical pills that allow him to go back and forth in time. 30 years to the past, young Soo-hyun meets future Soo-hyun and learns that his girlfriend will soon die because of him. In order to save her, the two Soo-hyuns try to change the past together, but a completely new and unexpected past is formed that leads to a new future.
| Actor | Age then | Age now | |
|---|---|---|---|
 | 48 | 57 | |
 | 30 | 39 | |
 | 22 | 31 | |
 | 46 | 55 | |
 | 30 | 39 | |
 | 22 | 30 | |
 | 48 | 57 | |
 | 49 | 58 | |
 | 38 | 46 |