House With a Good View: Voyeuristic Desire(2013)

So-hee has been seeing Tae-woo for a long time. One day, a new man named Eun-hyeok appears in front of her and proposes. So-hee has already promised to marry Tae-woo so she's not easily moved by Eun-hyeok's proposal. She refuses him by saying she loves women more than men and he becomes shocked. He goes under gender transplant to go back to her and becomes a woman named Eun-joo...