I'm no longer a lover. His words have turned me into his mistress. Claire has been hired as a cleaner at billionaire James's manor. While she's excited to find out that her boss is a handsome man, like a real prince in a castle, James is confused as to why a girl with an art degree is satisfied with a cleaning job. The answer is simple: Claire is in love with him. After her confession, they begin dating. But at the peak of their happiness, Claire discovers a picture of a woman in his study-he gives her a cold look and tells her the woman is his wife!