The Knight Captain is the New Princess-to-Be Series by Yasuko Yamaru

In this shojo rom-com tale, a dashing female bodyguard pretends to be engaged to her childhood friend, the prince. .. but is their fake betrothal really just an act to him? Christina, a. k. a. "Lady Chris," was born into a noble family and treated more or less like a boy growing up. Now a dashing young woman, Chris is not only captain of the imperial guards–she personally protects Prince Leonardo, who has been a dear friend since childhood... moreIn this shojo rom-com tale, a dashing female bodyguard pretends to be engaged to her childhood friend, the prince. .. but is their fake betrothal really just an act to him? Christina, a. k. a. "Lady Chris," was born into a noble family and treated more or less like a boy growing up. Now a dashing young woman, Chris is not only captain of the imperial guards–she personally protects Prince Leonardo, who has been a dear friend since childhood. When his father, the king, demands he find a suitable girl to marry, Leo insists that he's already found Chris! Chris is shocked, but figures that Leo doesn't really love her like that; it's probably just some ploy to keep the king happy. Chris decides to play along, but as the charade goes on, she starts to wonder if maybe her princely pal has actually fallen for her! less

SCHOOL OF LOVE. In order to support Prince Leo, Chris agrees to officially take his hand in marriage. But the other nobles are not fans of the union, and to mollify them Chris gets sent to a boarding school to become more “ladylike. ” Unfortunately for her, her fellow classmates are young ladies intent on marrying the prince themselves! Chris might be hot stuff on the battlefield, but is she prepared for this kind of warfare? !

THE THINGS WE DO FOR LOVE. Back from boarding school, Chris visits her family home with Leo. Urged on by the king, the two announce their marriage. Chris’s family is thrilled, but when her father urges her to quit being a knight, an unexpected father-daughter fight breaks out!

THE COUNTDOWN TO THE WEDDING BEGINS! Having returned to the capital, Chris and Leo begin planning for the wedding! Everything seems to be going well, but one day the king suddenly announces that the second prince, Leo's younger brother, will be ascending to the throne. With their wedding now canceled, will the happy couple ever make it to the altar?