A man who is sick of his fine wife falls for his friend's wife who studies Kamasutra!

Dong-ki's sexuality is burning with passion but he doesn't dare ask his innocent and pretty wife Ah-hyeon to fulfill them for him. However, his friend's wife Mi-ae is different. She loves risky sex and she approaches Dong-ki first. They fulfill each others' sex fantasy. Their relationship gets deeper once they become neighbors.