Dong-gook, who is thinking of remarrying, introduces his stepmother Kyeong-sook to his son Jin-yeong. At the family gathering, Jin-yeong is surprised to see his stepmother's younger brother Hyeon-sook who was his one-night stand just a few days ago! Jin-yeong and his stepmother is lying down, drunk. Meanwhile, there is a strange atmosphere between Dong-gook and Hyeon-sook, who were drinking alone, and at that moment Jin-yeong's girlfriend Joo-yeon appears drunk.

Da-hee gets married to Min-soo who is older than her. Thanks to him, he also gets a son who is not too old, Jae-hyuk, who she tries to get acquainted with, albeit awkwardly. After staying with Na-yeon, she suddenly has to meet Jae-hyuk, and Na-yeon has a date with Jae-hyuk. Min-soo is surprised to find three people coming back home from a date. It made him angry to see his son with two women. Right away, Min-soo seeks Da-hee and asks about Na-yeon. Na-yeon met Min-soo secretly. However, Da-hee who is aware of Min-soo and Da-hee's relationship, shares this fact to Jae-hyun.

Mincheol and Suhee go to greet Minchul father (grandmother) before marriage. Dae - sik welcomes her daughter - in - law, Su - hee. But before marriage, Minchol and Suhee are separated by the difference in personality. Soon-hee, who was only preparing for marriage, is soon to live.

Film producer Na-eun and director Yeong-tae are on the verge of shelving out cash for an adult film production. They're too busy blaming each other for the messed-up filming. Before another filming begins, Na-eun suggests Yeong-tae to become an actor himself and practice filming. Na-eun leads the shy Yeong-tae very skillfully. How far will the practice go...?

Three married women had always been dissatisfied sexually with their husbands, and Hyoji, who recently divorced due to her husband's erectile dysfunction. They gathered after a long time and had a drink complaining to each other, and they received a business card from an unidentified handsome man, saying, "Don't you want to play tteok pounding game?" The four of them head to the meeting place and meet suspicious agents who were waiting for them.

Seok, who wants to try perverted sex, pesters Hyun-jin every day, but Hyun-jin rejects it saying she only like normal things. And then one day while delivering chicken, he found So-ra and Hyun-soo, a couple who enjoys delivery exposures. Frustrated as he is with Hyun-jin, he starts neglecting her and became more and more hooked with the So-ra couple. To recover their relationship, Hyun-jin goes on a date with Seok. But then a call came for him. The couple invites him for sex. Will he be having a date with his wife, or will he accept the invitation he may only get once in a lifetime? What would be his choice?

Newly married couple Eun-mi and Seong-soo look ordinary, but they both have their own secrets. Eun-mi enjoys calling her boyfriend to her home while her husband is away on work and Sung-soo enjoys watching his wife have sex with other men through the CCTV in his house. Not being able to get over the excitement he feels by doing that, he tells his wife everything and suggests she has sex with another man again...

Yoo-jeong, who has been married for the first year, was enjoying a happy and sweet honeymoon with her husband. However, the dream of a sweet honeymoon is shattered by the obsession of the manager, who is the boss of the company. The manager takes revenge, not revenge, against Yoo-jeong because of her memories of being abandoned by Yoo-jeong in the past. Eventually, Yoo-jeong, who couldn't stop her husband's future, leaves her husband and gives permission to another man.

The three brothers Han Jun, Hyun Chang, and Seung Tae live in one house. The first, Han Junman, married Jihyun. Hanjun and Jihyun go on a trip to celebrate their first anniversary of marriage. The youngest Hyunchang calls his wife, Yoon-ji, who is a Visa's girlfriend.

Min-soo and Jae-hyeok is in a good father-and-son relationship. But one day, Min-soo brings Jae-hyeok's young stepmother, Da-hee. Jae-hyeok leaves home to wander around, ran into Da-hee's friend, Na-yeon, and had a little talk. Na-yeon calls Da-hee... Da-hee goes home with Jae-hyeok, and Min-soo doesn't care much. Jae-hyeok tells Da-hee how he feels. Meanwhile, Min-soo who disapproves Da-hee and Jae-hyeok's relationship, calls Na-yeon to kill some time. And Na-yeon who is worried about Da-hee and Min-soo crafts a new plan...

So-ra, a woman who lives day by day meeting conditions. Hyeon-soo, a man obsessed with women's scent. Upon Hyeon-soo's suggestion to sponsor her, So-ra maintains a lover-like relationship with him. Sora and Hyeon-soo as couples seduce men for fun, enslave them, and then destroys families. Once, while seeing a happy couple in a chicken restaurant, So-ra felt jealous and wanted to break that happiness. So-ra and Hyeon-soo decide to seduce the husband and brings him to their guest house after several delivery exposures. In the end, the couples swap together with Seok and Hyeon-jin at a chicken restaurant. Can Sora's plan succeed to destroy ordinary couples?

Jeong-hee goes home to take care of her sick mother. While Jeong-hee is gone, Yoon-soo convinces his father, Seok-jin, to call a housekeeper to do the chores while his mother his gone, and so comes Se-hee. Yoon-soo likes Se-hee and ends up sleeping with her. Seok-jin also ends up sleeping with her while receiving a massage from her.

Tae-soo is getting ready for a job in a single room that isn't soundproof and ends up calling his university senior, Woo-seong. Woo-seong recently hit the jackpot with stocks and is running a share-house near Seoul. Tae-soo explains his situation to Woo-seong and Woo-seong welcomes him to his home. When he arrives, he sees a naked woman and mistakes Bong-soon for his senior's sexy wife...

Yeong-bin can’t get a job and his father, Jin-il, thinks he’s incompetent. Yeong-bin is seeing Min-jeong, the florist, but she feels distant from Yeong-bin, who dreams of going to Seoul one day. One day, Jin-il brings home Ye-won, whom he is going to get remarried with, and Yeong-bin is furious, because she is his ex-girlfriend who abandoned him. However, they find out there was a misunderstanding to their break-up and they develop feelings for each other once again. Meanwhile, Min-jeong feels more attracted to Jin-il, because he’s more dependable.

Ji-hee, who secretly liked Min-soo, happens to study together at Min-soo's house, who is struggling with the exam. In that situation, Ji-hee secretly imagines a romance with Min-soo. When Min-soo finds out that Ji-hee likes him, he puts his head on and focused on his grades. Meanwhile, stalker Na-yeong, who also secretly likes Min-soo, suddenly visits Min-soo when she sees Ji-hee coming out. Min-soo uses Na-yeong...

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...

Couple Jin-goo and Joo-hee have been experiencing a lover's slump after their marriage. Meanwhile, a new couple in the neighborhood, Hyun-jin and Yoo-jeong came to the other couple's house to introduce themselves. They're attracted with each other's husbands and wives, and in the end, crosses the line that is not supposed to be crossed within neighbors. After that day, two couples' passion intensifies...