Nice Sister-in-law: Forbidden love/禁止的爱：善良的小姨子/착한 처제 - 금지된 사랑

This R-rated movie is about a man's fantasy: one can marry simultaneously a girl and her sister. And yeah in this movie there is a happy ending: the two sisters decided to share one husband. Wow, bomb~

Performance impression:
Director: Kang Hoon
Stars: Da-eun Baek, Seung-chae Lee, Seong-pil Kang