A Wife's Affair (2018)

Original title: 아내의 외도: 감독판

Min-jae wants to try something new as her sex life with her husband is boring. She hunts down men on the streets for sex and even has phone sex to satisfy her needs with men other than her husband. Her husband senses she is different and puts up cameras all over the house before he goes on a business trip. Everything she does while he's away gets filmed on camera and she doesn't know when to stop...