Sang-woo, who lives with his older brother, is actually related to his brother-in-law. He has his favorite co-worker in the office, but he can't confess because she seems to have a man. One day ...

Min-goo is troubled seeing her two older sisters, Min-ji and Min-ah, go naked in their daily lives. After much deliberation, he devises a plan to have his friend Byeong-min come into the house. ...