Hyeon-joo and Chan-sik became a sexless couple as she had suspicions that her husband was cheating on her. Then one day, she heads to her in-laws' house to take care of her father-in-law, Man-geun, who lives alone for the time being due to an accident. Without a wife, Chan-sik enjoys an affair with her employee but is caught by his father.

Seung-hee lost her parents when she was young and is raised by Joon-seok's father. Years pass and Joon-seok and Seung-hee get married and become a couple. Realizing that he married out of familiarity, Joon-seok meets a new woman. Seung-hee knows that Joon-seok is cheating on her, but she doesn't want to see Joon-seok and her lover happy with each other, so she persists. Seung-hee, who was somber, became acquainted with a photographer she met by chance. The two spend happy days, and Seung-hee decides to divorce him.

Park Joon-yeong lives in a room styled with collages of women's faces and photos cut out of magazines. While walking around the neighborhood and taking pictures, Jun-yeong accidentally encounters Da-hye, a married woman. Joon-yeong is hooked on Da-hye as soon as he saw her for the first time. One day, Jun-yeong sees Da-hye with her husband Yoon Seong-gyoo and sees a shocking scene.

The story of two sisters born with different bodies. Older sister Soo-hwa who failed with her business lives with her younger sister, Bo-hwa and his husband. Soo-hwa's husband Ki-hyeon confides in Bo-hwa's husband, Seong-goo everytime they have sex, worrying about Soo-hwa's coldness. Seong-goo on the other hand says that Bo-hwa is more passionate, suggesting for them to change partners...

The fugitive hides in the basement of a wealthy house where his wife works as a housekeeper to avoid debtors. Min-ho, a very successful businessman in the construction field, pokes at a new housekeeper, and his wife, who resents her husband for neglecting her, goes to find a fugitive living in the basement. The interlaced sex of two couples who gradually cross the water level. How far will their narrowly dangerous tightrope go?

Jeong-goo is in a relationship with his son's girlfriend, Mi-hee. Mi-hee feels guilty and breaks up with Yeong-jin, and Yeong-jin who is struggling because of it, got in a relationship with Joo-eun. Yeong-jin's ex-wife, Yeon-ri meets Jeong-goo by chance and finds out about the whole thing, and Yeon-ri who was curious about Jeong-goo, sleeps with him...

Kim Hak-cheol is a trashy husband who sends his wife Jin Joo-hee to his friend Kang Min-hyeok as a housekeeper due to gambling debts. He visits his wife once in a while and steals money. He borrows money from Min-hyeok, a golden spooner who is Hak-cheol's friend, on the condition that Joo-hee is sent as a housekeeper. Min-hyeok is kind to his friend's wife, Joo-hee. Over time, the true colors begin to emerge. Meanwhile, Min-hyeok's wife, Nam Gyoo-ri, lives together with them without knowing anything about Joo-hee.