Son's Girlfriend, Daddy's Girlfriend 2

Dong-gook, who is thinking of remarrying, introduces his stepmother Kyeong-sook to his son Jin-yeong. At the family gathering, Jin-yeong is surprised to see his stepmother's younger brother Hyeon-sook who was his one-night stand just a few days ago! Jin-yeong and his stepmother is lying down, drunk. Meanwhile, there is a strange atmosphere between Dong-gook and Hyeon-sook, who were drinking alone, and at that moment Jin-yeong's girlfriend Joo-yeon appears drunk.

A couple have been married for more than 10 years. They have long forgotten the pleasures of the couple's secret sex life. Through an accidental opportunity, Joo-hee has a relationship with the man next door and Kang-in has a relationship with the woman who has moved in. In order to recover the well-dried fountain of pleasure, each other's secret and bizarre affair begins.

A newlywed couple moved to a new house with big dreams. However, it was Hong-yeon, the landlord of Saek-gwang who was waiting for them. A strange atmosphere flows between Hong-yeon, who secretly seduces Jeong-woo, Jeong-woo, who is struggling not to fall for it, Yoon-gi, a slave man wearing a husband's mask, and Yoon-mi, who knows nothing. Will Jeong-woo be able to protect his family amid the endless temptation of the landlord?