My Perfect Stranger

The Secret You Have (1x3)

:

Yoon-young was able to enter school thanks to Hae-jun's help. As soon as she began her classes, she realized that one of her classmates was the future Ko Mi-sook. However, she was unaware of the danger that Ko Mi-sook posed, as she was extremely clever. Hae-jun ensured that Yoon-young remained at school until he could pick her up, but when he returned, Yoon-young was nowhere to be found.