Chitose, the youngest daughter of the Usagitsuki family, known for their fertility, is blessed with beauty and spiritual powers, and there is no end to potential marriage talk for her. However, she fell onto a trap set by her older sister Kuon, and is cursed to turn into an old woman. Although Chitose loves children, she had given up her dream on becoming a mother, and spends her days firmly enduring Kuon's harassment. One day, when Chitose turns 18, a mysterious man named Kotaro appears before her and says, "I'll grant your wish."
多産の家系で知られる兎月家の末娘、千年（ちとせ）は、美貌と霊力に恵まれ、結婚話が引きも切らない。
ところが、姉・久遠（くおん）の罠にはまり、呪いで老婆の姿にされてしまう。
子供が大好きな千年だが、母になる夢をあきらめ、久遠の嫌がらせにも健気に耐える毎日を過ごしている。
そんなある日、十八歳になった千年の前に謎めいた男・琥太郎（こたろう）が現れ、「お前の願いを叶えてやる」といって…。
遠山えまが贈る和風恋愛ファンタジー。