Aeran and Hoseok are in a period of boredom. Jung-woo, a friend and disciple of her husband's nephew, enters the boarding house, and Ae-ran begins to feel lost in the appearance of young and handsome Jeong-woo. Ae-ran and Jung-woo finally have a hot night. The secret love affair continues without Hoseok's attention, and one day, when Jung-woo's girlfriend Hye-mi appears, the four people's strange relationship begins to come to light...

Do-hee is alone in the house with her father-in-law as her husband is away on a work trip. One day, she sees him get bullied by his friends. Since then, she keeps thinking about his friend Yong-jin who looks strong and manly. Tired of being lonely, she seduces him. Yong-jin's body heats up for the first time in a long time and he goes to Do-hee's house every chance he gets to have a good time.

When the oldest son fails in business and the younger son dies in an accident, Hyunwook unintentionally lives with his two daughters-in-law. Then one day, Hyun-wook accidentally sees a small daughter-in-law taking a shower, and since then, her daughter-in-law continues to look like a woman, not a family. Besides, the daughters-in-law who have been alone for a long time are also noticing Hyunwook…