A Deceptive Journey: I've Become a Substitute for My Half-Sister and Must Marry a Foreign Man Whose Face I've Never Seen

The eldest daughter of Count Savoia, who was arranged to marry a foreign swordsman to end the border conflicts, refuses the marriage. Thus, the choice falls on Yulia, the count's illegitimate daughter. She changes her hair and eye color and travels to the foreign land as a substitute for her half-sister Fliela. A journey begins with Lea, a gallant female knight who comes to escort her. As Yulia grows exhausted playing the role of a countess, Lea proposes a "game of playing someone other than yourself." The two begin conversing as a "male knight and a village girl." The carriage sets off, carrying many lies with it.