Overview
After the unusual attack on a school 'flower boy', Sung-min, on February 14, the same attacks begin to happen at different high schools on every month of the same day. Rumors say that the next victims will be at Neulparan High School.
| Actor | Age then | Age now | |
|---|---|---|---|
 | 19 | 38 | |
 | 20 | 38 | |
 | 24 | 42 | |
 | 22 | 40 | |
 | 20 | 38 | |
 | 20 | 38 | |
 | 21 | 39 | |
 | 21 | 39 | |
 | 21 | 39 | |
 | 23 | 41 |