ルーチェと白の契約 (Series) favorite_border

[DeepL Translation - needs review] Volume 1 Introduction: Luce lives alone with her younger sister after the death of her foster parents. One day, a woman named Asesiya unexpectedly asks her to become her fiancé's lover. What awaits her at the place where she was taken half-way by force is Lioverna, the young head of one of the country's five largest families, the Gaillenches. Lioverna presses Luce to sign a contract with her as a fake lover...?

(Translator: DeepL)