Dahee is a young homeless girl who works in a cyber café . She lost her mother due to a disease when she was 10 and since that time she has been running away from her father's debters. However, her life had completely changed after meeting a man named Bang SiHyuk whom is an inventor. This man is one of the richest men in Seoul and owns a big Toys Company. He adopted seven handsome guys hoping for one of them to become his heir. But, they all have strange personalities.

Dahee can escape from her debt only by marrying Bang SiHyuk and becoming the mother of his sons. How will Dahee think of this situation? Will she accept to get married at the age of 19 and more impotantly to a man who's her father's age? And what about being the mother of a bunch of guys who are nearly the same age as her? Living with 7 men under the same roof, would it be as simple as we think?