It is revealed that Oh-sung gaslighted Jae-beom, leading him to believe Won-seok was responsible for his past trauma. In reality, Oh-sung was the one who had pushed Jae-beom off a building previously.
EPISODE 11 || Revenge Of Others || kdrama Explained in hindi YouTube · KDrama Verse
Amid the tension, Chan-mi and Soo-heon reunite and reconfirm their feelings for one another. Their relationship offers a brief moment of emotional relief before they are met with a new crisis upon returning home. Key Revelations
The episode heavily implies what is confirmed in the finale: Jae-beom was the one who physically pushed Won-seok to his death, though he did so while under Oh-sung's psychological manipulation.