Hyun-jin is always frustrated with his wife who always refuse her, saying she's tired. One day, Hyun-jin drinks with his friends, Min-seok and Jin-gi, and got a massage together per Jin-gi's suggestion. But then, he falls in love with the special service, and after that, Hyun-jin goes back to the massage parlor whenever he has time...

Gyeong-soo and Jeong-min used to be the happiest couple in the world. However, Jeong-min is left home alone after her husband leaves to the regional area for a lengthy business trip. While she tries to deal with her lonely feelings, her son’s tutor Min-hyeok starts flirting with her hard. And although Jeong-min knows she shouldn’t, she starts being attracted to Min-hyeok more and more. Meanwhile, Gyeong-soo finds his place in a boarding house in the regional district and starts getting attracted to the owner of the board house, who is a single mother with a young daughter.

Lim Da-yeong, the older sister, intercepted the lover of her younger sister, Lim Da-jeong, who is Yoon Tae-jin. As if this were not enough, Da-yeong imprisoned her younger sister in a mental hospital and lived a happy married life with Tae-jin. Then one day, the Da-jeong escapes from the mental hospital and conspires with helper Jo Yong-hwan, who is her ward friend, to exact cruel revenge on her older sister and her former lover. Both Da-yeong and Tae-jin endure Da-jeong's bloody kidnapping, domesticated slave life and harsh punishments. They look for opportunities to escape with a scary plot in their hearts. What will be the ending for these crazy sisters?

Sin-wook and Dong-soo have been friends since they were kids. Sin-wook and his wife swap partners with Dong-soo and his wife. They start playing Strip Go Stop and the game gets serious. The four of them have sex, but they end up falling for each others' wives and husbands and even meet in secret. One day, when their sex life reaches its peak, Sin-wook's wife, Yeon-hee, gets pregnant, not knowing whose baby it is. Her relationship with Sin-wook is on thin ice and then the baby is born. They do a DNA test to find out who the father is.

Seok-yeong has been living with his father ever since his parents got divorced when he was young. His father, Joong-nam, would always introduce his new girlfriends to Seok-yeong, but Seok-yeong didn't like running into strangers in his house. At the same time, Seok-yeong feels more comfortable with women older than him. One day, Joong-nam says he's going to marry his new girlfriend, Gyeo-won. At a family dinner, Seok-yeong feels attracted to Gyeo-won's sister, Gyeo-woon, but he has to call her 'aunt'

"Trust me tonight" Min-ho is preparing to get a job and is spending some time in his parents' house. However, his parents aren't home and only his young sister-in-law is there. His brother Hyeon-soo had left the house after fighting with his wife. Min-ho can't help but feel attracted towards his young and appealing sister-in-law.

New couple Na-ni and Joon-seo left the stuffy Seoul to try and start a cafe in the countryside. Behind the couple's attempt to change, they had some unspeakable worries, so they were sexless people who used their own rooms because they were not sexually compatible. Regardless of her husband's efforts to establish a relationship, her wife Na-ni has long been on an extramarital affair with her sex partner Dal-ho, who has been embroiled in a hit-and-run accident that she never thought of enjoying sex outdoors and is asked for a large settlement.

最年轻的小姨子