Kyung-soo and Eun-ji are married due to their parents' business. Eunji is sad and depressed because her husband's love is not married. Meanwhile, Gyeongsu meets Yeongju without a wife and has an affair. One day, Eun-ji's boiler broke down at home, and she called an AS engineer. He meets Jung Hwan, who was a lover before marriage. The husband goes out of the hotel saying he sleeps at the hotel until the boiler is repaired, and Eunji and Junghwan get hotter after thinking about it...

My Wife's Lover 3

Ga-eul is six years into her marriage but her trouble with her husband brings her to depend on alcohol. Hee-mang is a writer who lives next door but can't stand the fighting going on at Ga-eul's house and makes his way over there one day. Ever since then, Ga-eul goes over to Hee-mang's house to have sex everytime she fights with her husband. Hee-mang is confused at her behavior and gradually falls for her. Then Ga-eul slowly resolves things with her husband but Hee-mang asks to talk with the three of them...