Rooftop Prince S01E14 - Se Na Being Caught in a Lie

Lee Gak finds out about Park Ha and SeNa being sisters and SeNa's relationship with Tae Mu. He confronts her and breaks the engagement. Tae Mu is still holding his Joker card (i.e the real Tae Yong's pics) so he can destroy Lee Gak at anytime. Lee Gak looses his "His Highness" influence on the trio. CEO Jang plays along with Sena and Tae Mu to know why they are deceiving her. Lee Gak realizes that Park Ha is his sister-in-law in Joseon!