When her stepmother steals her dowry, she reads out the account books in public, down to the last coin.
When her half-sister tries to ruin her reputation, she turns the tables and lures her into a trap, leaving her disgraced.
From the marquis's household to the imperial court, she draws on her vast store of memories to send her enemies one by one to their doom.
Note 1: The heroine is neither saintly nor soft-hearted. She always takes revenge, and her sense of morality is not strong. Readers with strict moral standards may want to skip this.
Note 2: The hero is pure in body and heart, from a respectable family, and has no interest in women. He breaks that rule only for the heroine.
Note 3: One-on-one romance, two equally matched leads. Household battles in the first half, palace intrigue in the second, with plenty of satisfying moments.
Very nice, please update more!