My Happy Ending Season 1 Episode 9

Jae-won’s father learns from Yoon-jin that Soon-young cheated on Jae-won. Outraged, he demands to know what Soon-young plans to do with Jae-won, and they both decide to keep Jae-won in the dark. Soon-young finds out who A-rin’s biological father is and what happened with Jae-won seven years ago.