Yoon-yool and Min-seong go out to a company dinner with their bosses, Yeon-joo and Han-yeong. Min-seong had to carry Yoon-yool, who is passed out due to alcohol, on the way to her home. When Yoon-yool wakes up to take a shower, she is surprised to see Min-seong inside her room. Min-seong became excited when he saw Yoon-yool wearing only a towel and couldn't hold on to the temptation to lust for her body.
Ha-yeon, a new wife, calls the old man next door, Seok-bong, her father, and takes good care of him, but she has no idea that he has been targeting her. One day, Seok-bong invites Ha-yeon for a drink. But since she is lightweight, drinking alcohol put Ha-yeon easily to sleep, and Seok-bong slowly savors this moment.
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Ha-seon and Do-hoon, a couple who love sex, enjoy sex all the time, to the point that Do-hoon's 'stuff' breaks due to too much intense action. After the accident, Do-hoon's 'stuff' has not been as good as before, and Ha-seon is getting tired of her unsatisfactory sex life.
Cheon-seok and Mi-seon remarried. Mi-seon goes on a trip with her friends and asks her daughter-in-law to take care of her father-in-law for a week. Her father-in-law and her daughter-in-law came to live together for 7 days. Her daughter-in-law, who tasted her father-in-law's crispy pork belly, falls in love with her father-in-law...
The young deputy Dong-sik and his wife, along with the middle-aged couple manager, went on a trip together as a couple. In fact, Dong-sik became involved in their friendship trip with ambitions for promotion. However, Dong-sik's wife, Eun-joo, takes care of her wives and is full of dissatisfaction because she seems to have become a helper for them instead of a trip. By chance, Dong-sik witnesses the manager's wife, Mal-sook, having an affair with her manager Seong-gil. In order to shut Dong-sik's mouth, Mal-sook starts her secret proposal...
Mi-na, who enjoys a business trip massage at her house, admires the skills of the new business trip massage therapist, Hyeon-goo, and decides to introduce Hyeon-goo to her close younger sister, So-hee. At first, So-hee, who was reluctant to meet Hyeon-goo, fell for his massage skills. Then one day, Mi-na made a new proposal to So-hee and Hyeon-goo...
Yeon-hee, who hasn't changed her hair and isn't ready for the first night, gives sex advice to her friend over the phone and calls her boyfriend over to have sex. Unlike the first time, he is overflowing with libido and visits her office to have sex. Ji-ho is worried about her girlfriend. Although they are friends, Chae-ah and Seon-woo end up having sex after drinking during the day. Different sex stories of 4 couples.
A young couple, Wan-jin and So-hee, are living with Wan-jin's single father, Seok-bong. Seok-bong was preying on his daughter-in-law, who was doing the housework and preparing meals for him while her husband was away at work. He pretended to have dementia and attacked her. So-hee, who was suffering from her shame, suggested to Wan-jin to hire his father a caregiver, saying that his father seemed to be suffering from dementia, and so Bok-ja, a sexy and voluptuous caregiver who was about Seok-bong's age, came in. Seok-bong is captivated by Bok-ja's passionate charm and soon begins to share his love with her, and in this way, she takes the place of Wan-jin's new mother.
