A Male Housekeeper(1968)

Original title: 남자식모

A woman hires a male cook, being afraid that her lewd husband may have an affair with a female cook. Hyeong-gu, who thinks about how to collect money for his brother's research, starts working in her house. While he serves as a cook there, a lot of funny episodes happen. Finally, his brother finishes his research successfully and he gets out of the house to work for his brother's company as a managing director. He also gets married to a cook maid of the neighbor next door. It turns out that the maid is the daughter of the land lord, not a hired servant.