Overview
Seonduk Arts High school sets a “moral distance rule”, forbidding physical contact between boys and girls. The school recommends Byeonchan and Seohyun, who have been meeting for 700 days, to transfer to another school because of this rule.
| Actor | Age then | Age now | |
|---|---|---|---|
 | 19 | 28 | |
 | 25 | 33 | |
 | 30 | 38 |