Mireille is the daughter of a bakery owner and her twin brother Fredrick was adopted into another family when they were kids but they remained in contact with each other by sending letters to each other. One day a letter from her brother said he was in love with another man's woman. She replied, provoking him to be a man and claim the woman as his. Two months later, a beautiful young man named Richard, claiming to be a messenger from her twin brother Fred, visits and tells her "I've come for you." When the bewildered Mireille resists, he proceeds to kidnap her! She learns that Fred has run and eloped with the crown prince's fiance and now, it is now her responsibility to impersonate Fred who was the former Count of Bernhardt! *Note: Includes four extra chapters.*

In this retelling of its prequel, Migawari Hakushaku no Bouken, Frederick talks about his observations of Mireille.

On the outskirts of the imperial palace of the great power, the Tserbakia Empire, lies a "ghost mansion" - the Palace of Verdure. In this dilapidated and rundown mansion lives Euselica, the fifth princess, abandoned by her father, the emperor. With no backing after her mother's death, she lives frugally and works hard to manage the estate her mother left her. One day, the emperor suddenly announces that a competition will be held to select the crown prince. Euselica is surprised, but thinking that if she becomes emperor, she can get revenge on her father who had neglected them, she decides to run for the competition! The condition is to "build up wealth and enrich the country within three years." The days of building wealth through military force are over. With this in mind, Euselica sets her sights on human resource development and decides to put a "certain plan" into action... The story of an abandoned princess's dramatic rise to power begins here! (Source: AlphaPolis, translated)

Mireille is the daughter of a bakery owner and her twin brother Fred was adopted into another family when they were kids. One day a letter from her brother arrived, saying he was in love with another man's woman. She replied, challenging him to be a man and claim the woman as his. Two months later, a beautiful young man named Richard, claiming to be a messenger from Fred, visits and tells her "I've come for you." When the bewildered Mireille resists, he proceeds to kidnap her! It turns out that Fred has eloped with the crown prince's fiance, and it is now her responsibility to impersonate Fred - the former Count of Bernhardt!