Migawari Reijou wo Sukutta no wa Reikoku Mujihi na Koori no Ouji no Ai deshita

As the illegitimate daughter of a count and his maid, Katrina was born into miserable circumstances. And now that she's lost her mother, the treatment from her stepsister and stepmother the countess has only grown worse. One day, her stepsister receives a royal order to move to the northern outskirts due to her unseemly behavior at a recent party. There, she is to learn proper conduct under the tutelage of the resid…