Gyeong-tae, the husband who is tired of sleeping with his wife, posts that he is selling his wife on a second-hand website. After reading the article, Young-sik accepts the transaction and sleeps with Gyeong-tae's wife. Gyeong-tae, who is secretly watching, gets excited when he sees his wife having sex with another man.

Eun-hye is a substitute lecturer. One day she is freaked out by being stalked and calls her cousin in to live with her as her bodyguard. Kang-tae is a test repeater and he's impressed with how hard working Eun-hye is and starts feeling fond of her. One day, he drinks with his friend Tae-bum and gets drunk while talking about his cousin.

Jung-sik helps out a friend and finds himself attracted to his friend's mother. After being caught steeling the mother's underwear, he becomes the victim of the mother's seduction.

Third time repeater Sang-goo needs special tutoring for his upcoming college entrance test. His father puts his son away in a pension together with a beautiful female teacher in hopes of motivating him.

After graduating from college, Minji, whose goal is to meet and marry a man with a lot of money rather than a job, spends more time in the club than in the library and lives every day. One day, Min-ji pretends to know a man he doesn't know at a convenience store . Tae-soo's father, who failed in business, left himself and his mother and fled, and the mother who had struggled to build a home alone died of cancer three years ago. Min-ji is starting to live together because Tae-soo is now unhappy, saying that she is living hard at the Gosiwon in Seoul alone.

Joon-soo was dumped suddenly by his girlfriend Sung-eun and is surprised by his father’s news of re-marriage. What’s even more surprising is that his step-mother to be in his ex-girlfriend Sung-eun. This is unacceptable and Joon-soo is in pain until a mysterious woman named Minki appears in front of him. She knows about him and his real mother. She tells him good things will happen to him and leaves after giving him a frame with a picture of a cat. A sexy woman appears the next day and comforts him, making his step-mother jealous. Will Joon-soo get over his ex-girlfriend? Or will they get back together.

Jung-sik and Dae-soo are twenty-year-old students. They haven't yet had their first time and all they talk about is sex. Since they are unable to seal the deal, they watch porn instead. One day, Min-jung, Jung-sik's mother's friend, moves in with them to stay until her divorce settles. She will make dreams come true.

She's sensitive because she's suffering from sexual excitement syndrome, which is sensitive to small stimuli. She has been receiving regular counseling and treatment from her psychiatrist, "Stabilizer," to cure her illness. But her illness, which can't be cured easily, causes her to be in a difficult situation, burning hot even when she's at work...

Couple Soo-ji and Sang-min, who once lived next door, and Soo-yeon who experienced having an affair, spends a moment of confusion due to Soo-ji's sudden death, and now lives a normal life with her husband Dong-seok. Then one day, Dong-seok gets into a parking dispute with Mi-ran, a newly-married couple who moved next door, and Soo-yeon is embarrassed to learn that Mi-ran is the female junior who once had lesbian tendencies towards her in college. Two couples living next door and getting close. Unlike before, Mi-ran has become a lawyer and ignores Soo-yeon. Soo-yeon gets angry. Meanwhile, Soo-yeon found out that Mi-ran's husband, Seok-ho, is a stay at home husband, and Soo-yeon who is in the same situation is attracted to him.