
One day, Hye-ri tells her friend Joo-hee about her worries. Hye-ri, who has not been in a relationship with her husband Seok-min for several months, says that she needs some stimulation and recommends a couple swapping. Hesitating Hye-ri, Joo-hee invites her husband to persuade her husband to help. Joo-hee and Byeong-ho, who enjoy a promiscuous sex life, look forward to swapping with the innocent Hye-ri…