Dad abandoned Sungmin with just a letter. Not wanting to sleep on the street, Sungmin had no choice to move into the house which belonged to her late grandfather.

Sungmin did not expect that the house was occupied by 9 Demons and each one of them was notoriously handsome.

Sungmin thought that she was turning crazy but she just took it was. After spending some time with them, Sungmin surprising felt at ease living together with them. 

And, Sungmin even fell in love with one of the Demons. However, his memories had been sealed away and he had someone in his heart....