Synopsis :
An erotic film about men improving their relationships with their wives through therapy. Ji-hoon, who is a loving husband, is always worried due to his premature ejaculation. He can only last for 10 seconds after insertion, so he just keeps caressing his wife for a long time, as he always feels afraid that he will finish quickly. At her wife’s urging, he began consulting with a psychiatrist. When Tae-woo, another patient with a similar problem whom he met at the hospital, discovers his illness, the two become true friends who share each other’s pain.

Synopsis :
You have my boyfriend! The exchange sex of naughty sisters who are attracted to each other’s lovers rather than their current boyfriends. Due to her sudden reassignment, Ye-seo ends up staying at the house of her older sister, Ye-jin. Although Ye-jin hates the sudden cohabitation with her younger sister, they end up living together happily thanks to the friendship between the sisters. Meanwhile, Ye-jin is troubled by the lack of compatibility with her lover, Kyeong-soo, so she throws him away. However, she feels that it’s a waste to throw Kyeong-soo away because he is still a good man, even though it’s not fun to have him, so she confides her concerns to Ye-seo and tells her to have Kyeong-soo. Ye-jin is also attracted to Ye-seo’s lover, Soo-cheol, so when he came to their house and fix the light, Ye-jin seduced Soo-cheol and ended up having sex with him while her younger sister was away. On the other hand, Ye-seo also calls Kyeong-soo to help her with her computer work, seduces him, and they have sex as well. The secret sex life of Ye-jin and Ye-seo, two flirtatious sisters who swap lovers with each other, begins.