Daughter from a poor family+Business+Counterattack from aristocratic family+Marriage first, love later
The legitimate daughter marries into a declining aristocratic family, but her husband seems mediocre but is secretive. The two join forces after marriage. The heroine relies on her business talent to revitalize the family business, while the hero relies on his tactics to restore the glory of the family. From treating each other as guests to running in both directions, he defeats snobbish relatives and rivals in the business circle, creating a legend of the rise of the family.
