Narikin Reijou no Shiawase na Kekkon: Kin no Mouja to Nonoshirareta Reijou wa Chichi Oya ni Urarete Henkyou no Buta Koushaku to Shiawase ni Naru

After successfully restoring her estate in her teens, the brilliant young woman, Beatrice Laplace, is accused of being a "rich girl" and has her engagement broken off for unjustifiable reasons. She is also forced to bear a large amount of compensation and becomes engaged to Duke Alphonse Orreau, who is infamous as the "Duke of Pigs". However, Alphonse is not as gentlemanly as he is rumored to be, and entrusts Beatrice with the reform of his estate...! Source: MU