Jinyoung and Chie, who each had their own circumstances and needed a place to stay, go to their sister's house. Jinyoung and Jinyoung who kicked out because of the cheating of their lover Jungmin. Chie, her half-sister, came to Seoul in search of a modeling job in Japan. Just in time, their older sister was away on a business trip, Hyungjin, who will soon become his brother-in-law, welcomes you. Hyungjin has a lover who is so busy that even marriage has to be delayed. With him, whose desires are growing, Two very sexy sister-in-laws start living together.