Anna is a haughty and arrogant rich girl. Her domineering character formed since childhood makes everyone around her afraid of her. On the other hand, Jaesu is an ordinary man with no family background or wealth, and he even has three step-siblings to take care of. Due to various coincidental events, Anna and Jaesu have had many unpleasant encounters. Just as Jaesu was thinking about how to take revenge on this rich girl, a good opportunity arose - Anna lost her memory! Jaesu deceived Anna into believing that she was his wife and took her home... Thus begins a series of interesting confrontations between the still self-centered young lady who lost her memory and the down-on-his-luck but simple-hearted man who appears arrogant on the outside but is actually very kind-hearted inside.