Narikin Reijou no Shiawase na Kekkon - Kane no Mouja to Nonoshirareta Reijou wa Chichioya ni Urarete Henkyou no Buta Koushaku to Shiawase ni naru

Beatrice’s engagement to the Crown Prince ends due to her warnings about extravagance. She is sold to the "Poor Duke" Orlo to settle family debts. Determined to improve his barren estate, she works hard, leading to increased revenues and a budding romance between them.