Kaede Kuze is the daughter of a long-established restaurant owner. Unlike Aimi, her talented and beautiful older sister who does everything flawlessly, Kaede was reserved and disliked by their father. Things get really bad for Kaede when the restaurant suddenly falls on hard times. No longer treated as a family member, she is forced to help as a housekeeper. Meanwhile, Aimi receives a marriage proposal from the Nanaougi family, who runs a big-name IT company. She is reluctant to accept the proposal because her rich and handsome suitor, Ritsuhito, is rumored to be a cold and ruthless individual. Kaede, who has a bad reputation, marries into the family instead, but Ritsuhito becomes gradually attracted to Kaede's humble self...