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.

An unknown author of Chunhyangjeon and called “Yagokbisa”. Writer Chun Sa-Wol, who has become a hot topic in Jang-an by writing a love story. Falls in love with Baekga, a mysterious man who insists on free dating. One day, the female exorcist Dalgi and the Amhaengeo teacher Inan. They come to the spring and summer months for the purpose of not knowing the reason, Noh Daegam devises a scheme to control the body and mind of Chun-Sa-Wol.

The male owner lived with his parents. One day, he went home and bumped into a strange woman to take a bath in his own house. It turned out to be the daughter of his father's friend. Seeing that the two were of the same age, the man wanted to associate with her, but she did not want to. The man even sneaked into her room and sneaked into her underwear, and was discovered by her mother. In fact, the father of the man is also an old-colored stick. The girl like this daughter is also a child.