Infinite Sex

Yeong-soo marries Mi-ran to have a house. He wants to divorce Mi-ran when their marriage is not smooth due to poor compatibility. Yeong-soo tries to attack Mi-ran's employment through Se-ri's introduction, but Mi-ran finds out who Joon-ho is and makes a counterproposal to him. Joon-ho is going to attack Yeong-soo using another sex master, Mi-mi.

A company employee who went to deliver goods at his president's request secretly sees the president's wife masturbating out of loneliness and takes a video of it. She may be distressed when she is caught by her husband's employee, but she becomes more attached to a man who is more compatible with her than to a husband who is not interested in her, and she keeps thinking about that man.

Korea's most popular song writer Hee-soo runs into a nineteen-year-old boy in the elevator. Hee-soo is inspired by a new song watching him shake at her figure. She starts to tell him about women under the excuse that she's teaching him music. They fall for each other but things get complicated when her life teacher, Joon-ho who taught her about life and music comes back.

The special secret to a successful noraebang is revealed! The noraebang where Hee-jin works is for customers who want a call-girl. When they start turning around and leaving, Hee-jin decides to become a call-girl herself and even brings her friend Seong-hee in. Rumors of Hee-jin and Seong-hee's beauty and service quickly spread and more customers come. When they've made enough money, Hee-jin and Seong-hee decide to open their own noraebang and display a hidden special service.

While Mi-na is out, Hyeon-goo invites So-hee to his house and enjoys. She forces So-hee, who wants to go to sleep, back to her house because Mi-na doesn't know when she will come back. However, while secretly meeting Seung-mo, Mi-na informs Hyeon-goo that she cannot enter her house, and Hyeon-goo regrets sending So-hee to her house. But this time, he invites Soo-yeong, a business traveler, to his house.

David is sitting in a bar, musing over why he has bedded and left five or six of Asia's loveliest women in such a short time.

The female boss of adult products opens her own personal channel, thinking that if she introduces her unique experience of sexual masturbation through YouTube, it will attract attention. From product planning to product production, she talks about various episodes and succeeds in establishing herself as her popular YouTuber. The episodes she unraveled vary from an unusual part-timer who tests her products first, including the experience of having sex with her customers at her supply shop, to various stories. ​

In Hwa and Jong Soo, who lived an ordinary daily life, face a crisis in their relationship when sister-in-law and Hyun Ah suddenly appears one day. In the past, the sister-in-law had a relationship with Jong Soo, perhaps because of that, In Hwa became more and more hateful of her younger sister.

Jeong-hyeok happens to meet In-joo, a former karaoke helper, in his neighborhood while being bored with his married life with Eun-hye. In-joo sees Jeong-hyeok's affair and takes advantage of it and asks him for money, but Jeong-hyeok seduces her to swapping because he will give her more money. In-joo, who needed travel funds with her lover Woo-seong, allows swapping and begins to swap. Embarrassed by his lover's and husband's swapping proposal, Woo-seong and Eun-hye are forced to share the swapping. Then Woo-seong and Eun-hye are attracted to each other, and they meet secretly.

Friends Cheol Min and Jae Hyuk meet and talk to each other after a long time. Jae Hyuk said that the domestic helper who recently came to work at his house is strange. He said he was worried because she couldn't do the housework. When Jae Hyuk said she seemed to be trying to seduce him, Cheol Min tells the innocent Jae Hyuk how to get around her. Can Jae Hyuk succeed in having sex with a beautiful housekeeper?