A woman who has never paid much attention to etiquette or elegance lands a job at the prestigious Misono Trading Company—and then learns she is actually the heir to the family that owns it. Moved into a mansion to learn how to behave like one, she finds herself surrounded by a fiancé who runs hot and cold, a butler who is unfailingly kind, a strict brother-in-law, and a wild cousin. Proper ladies can, apparently, do whatever they want—but first she has to figure out what that is.