Camilla, the First Princess of the Kingdom of Lapladia, works as a priestess at a convent. One day, her tyrannical elder brother orders her to marry a young knight who was originally engaged to her sister.

Camilla pities Luke, her husband, who is forced to marry her—a woman eight years his senior—instead of her beautiful younger sister. As a result, their married life becomes awkward.

Eventually, Camilla gives birth to a daughter. However, while protecting her child from attackers, Camilla is petrified.

When Camilla awakens, fifteen years have passed. What awaits her is the doting affection of her husband—whose age difference with her has now reversed—and her daughter, who has grown into a beautiful woman—!?