Seokbong and Yuna are a married couple. Hyemin and Jisoo live next door to them. Unlike Seokbong and Yuna, who lead an exemplary family life, Hyemin and Jisoo are a free-spirited couple. However, in fact, Seokbong and Yuna are a sexless couple who cannot open up to each other and are suffering. One day, Hyemin notices Yuna's loneliness and attacks her, and Jisoo also finds out about it, and the free-spirited couple decides to help the couple. Seokbong and Yuna, who receive their coaching, return to being a harmonious family. As time passes and the couple becomes bored again, they ask the couple for help again...

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.

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.

Na-ri joined the company as a new employe, capturing the hearts of her colleagues with her outstanding skills and looks, but she had a plan! She pretends to be in love with the president's son, registered her marriage with him, and have other male motives who don't know about it pay for him recklessly. It's a love-war-like story where Hye-seon, who was in an internal relationship with the president, proceeds with the plan that Na-ri has made and eventually takes over the company.

Won-il convinces Ji-na to make money through phone tube. The video of the two went viral, and Won-il picks an additional person. Hwa-jin and Yoo-na who started to work together like that visit Ji-na one day to receive a video and Kwang-soo run towards them...

One day, Jae-kwon who lives alone decided to live in the same house with his cousin Jae-won. Jae-won, who was adopted as a younger brother, eagerly followed his cousin's authority when he was young, but he is increasingly agonizing over how to express his feelings as a heterosexual. The relationship with Hyo-seong, is a kind of relationship where they are not responsible for each other, but is only financial...

Yeon Ja, a working mother, runs a car center after divorce and is raising her daughter all by herself. Her daughter, Ah Jung, started helping her when she became an adult, however, the customers don't trust weak-looking women to touch machines and the business at the car center is slow. Thanks to Ah Jung's punk boyfriend, Sung Hoon, they came up with an idea to turn the car center into a sexy car center.

In front of Yoon-ju, who is working as a stewardess, a middle school alumni official comes to visit after 10 years. A set meal that appeared in such a wonderful shape that it was impossible to find it in its former form. Yoon-ju tries to reject her formality, saying that he is already married, but in the face of her constant temptation, she eventually collapses at her helplessness...