Master's Mother and Daughter.

When her husband, who is much older than her, dies, Hyo-jeong, a young mother who ends up living with her one-year-older stepdaughter, Joo-ah, decides to find a male helper. Each one of them brought a male helper, but the mother and daughter were fighting over which of the two they should hire. Eventually, they decided to pick both of them. Hyo-jeong and Joo-ah enjoy a pleasant sex life with their male helpers who match each other's styles. However, mother and daughter get tired of it quickly.