불륜의 세계

A young couple travels to a guest house run by another couple. The allure of this place is that it can arouse the sexual fantasy of new couples through swapping partners between the guest couple and the couple who runs it.

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.

Two successful, beautiful women compete for status by involving a handsome student. Will they succeed in their games and seduction?

Joon-sik happens to meet Bo-jin, a former room helper, in the neighborhood while he is tired of his married life with Soo-jeong. Bo-jin, who lives hiding his past, feels threatened by Joon-sik's appearance and demands money by catching his weaknesses...

Ga-hyeon, a graduating student, visits her professor Min-cheol to adjust her grades. Min-cheol promises to adjust her grades on the condition that she helps him...

Seul-i and Yool-i meet on a trip and treat each other more than their own sisters. Seul-i feels burdened by the fact that Yool-i likes her sexually and introduces the men to Yool-i.

Yeon-jeong is a girl crush who has a sexy body and good education. She became a team leader by beating up men her age. Yoo Ah-rin, an intern, keeps getting on her nerves. All she is, is a local university graduate, with a pretty face. A corporate slave! Feeling pity for Ah-rin, who is in charge of her bosses' chores, Yeon-jeong claims to be a shooter to protect Ah-rin from male employees, and Ah-rin, a new employee who thought it was a mugwort, starts to covet her things little by little. Ah-rin, a new employee who she only thought was an idiot, begins to covet her love affairs little by little.

Jeong-ho fights with Ye-rin. He happened to meet Eun-jeong, the wife of a senior who passed away. He tried to win Eun-jeong's heart, who was once his first love, but she has no intentions to date another man because of her husband. Instead, Ji-hye who lives with Eun-jeong falls in love with Jeong-ho. Ji-hye is trying to match loner Eun-jeong with the junior of his husband, Joon-hyeok, but is uncomfortable. Will Jeong-ho be able to love Eun-jeong?

A brother and sister met at an orphanage and lived together for a long time. The brother came to meet her sister, who had already gotten married, to listen to her worries. A very drunk sister brings up the story of his husband cheating on him...

Managers Im Yoo-na and Kang Ji-won looked like an in-house couple. However, Yoo-na will actually marry team leader Byeong-seok who has a heart for her. Even after marriage, Yoo-na can't seem to forget Ji-won. Byeong-seok thinks that he's having a stable marital relationship with Yoo-na, but he can't relate to her feelings. He deliberately invites Ji-won to his home. Byeong-seok's obsession gets worse, and the three hide their true feelings for each other, and the relationship becomes strange.