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.
