Kim Min-ja

Myeong-ho (Hwang Hae), a middle school teacher who had grown up in poverty, and Bu-nam (Yang Hun), the first son of the president of a trading company, attend the same university. A doctor suggests that Bu-nam, who is sick due to overeating, and Myeong-ho, who suffers from malnutrition, should switch life styles for two weeks. While living in each other's house, they fall in love with each other's younger sister and get married at a joint wedding ceremony.

A family drama about the entangled conflict, love, and reconciliation of the characters around them, centered on Mammal's eldest daughter Jin Ju and Eun Ju's sister Eun Ju, who grew up with her parents' love.