Having grown up in a middle-class household, Mugiko always longed to become an heiress. Her wish is surprisingly granted by her biological grandfather, a respected family patriarch, who finds her after a long search. As she enters the lifestyle of an heiress, each day offers a new experience. However, everything appears different from what she imagined, mainly when her grandfather sets up her betrothal to his former successor, Yoshiki. Aloof and unapproachable, Yoshiki fails to acknowledge her as the legitimate heiress.
