Young-soo goes to the rooftop to smoke, and sees Eun-young, a student in front of the laundry. Young-soo puts emotions of love in her heart in the shape of pure Eun-young. Eun-young has a school meeting, so she asks one in front of her to take the goods, and Eun-young goes to say thank you to Ha-na on her way home. Amazed by the moan through the porch, Eun-young opens the door to her curiosity and sees Ha-na and Young-soo having sex on the sofa, and feels a strange feeling. He stutters his body unknowingly. From then on, he suffers from the sound of sex in his head... Meanwhile, one of the winners of the 4-person family pension tells Eun-young, who is in front of her, to go to the pension when it's time. Thanks to Ha-na, Young-soo, Eun-young, and Jae-suk go on a trip and have a very sweet and sweet love. Enjoying sex in different and unique ways at Pensions... Four people enjoying a vacation while making good memories...

When the man ejaculates before the woman cums, the sex begins all over again and the same goes for when he ejaculates on time and the sex repeats. His techniques get better, but he can't help but ejaculate prematurely and everything is back to square one... endless sex. The man has sex with two women everyday and is trapped in a loophole of sex. He doesn't have a choice. The man can only get out of it if he doesn't ejaculate. However, he feels horny again almost right away and he ejaculates too soon, once again... He has to get out!

There's a beauty who can't see. Her boyfriend broadcasts her private life in secret under the ID 'Blind Beauty Boyfriend'. The boyfriend holds an event to see Blind Beauty in person. Viewer 'Smoking After Sex' gets picked. Seeing her up close and personal makes him feel even hornier. In the end, he can't control himself. He tackles 'Blind Beauty Boyfriend' and stands in front of Blind Beauty. Just as he's about to touch her, she opens her eyes and asks, "Is that how you like it?" 'Smoking After Sex' collapses to the floor as Blind Beauty glares at the camera and says, "You're all the same pieces of shit."

Sin-wook and Dong-soo have been friends since they were kids. Sin-wook and his wife swap partners with Dong-soo and his wife. They start playing Strip Go Stop and the game gets serious. The four of them have sex, but they end up falling for each others' wives and husbands and even meet in secret. One day, when their sex life reaches its peak, Sin-wook's wife, Yeon-hee, gets pregnant, not knowing whose baby it is. Her relationship with Sin-wook is on thin ice and then the baby is born. They do a DNA test to find out who the father is.

Hyeong-woo is forced to be quarantined with her sisters-in-law for 21 days due to the new virus. Hyeong-woo, who remains with his sister-in-law is shaken by the temptation of prohibition. Eventually, the virus spreads and becomes the beginning of human extinction. However, rumors are circulating that sharing forbidden love can amplify the energy and defeat the new virus, which they cannot help but believe. Their own sex, which began like that, makes them forget even the fear of the virus and makes them unable to break up.