Swapping Incorrect Delivery

Storyline

His wife So-hee lives in the indifference of her husband Seung-mo. Every night, So-hee waits for her sister-in-law, wearing her pretty clothes and makeup to get her husband's attention. Seungmo puts Sohee aside and is having an affair with her young Mina. Then, one day, Hyun-gu arrives at So-hee's house by mistake. When I saw her Sohee, I fell in love with her at first sight...