A Vow for an Heiress

"Rosa summoned up her courage and asked Lord Ashurst... ""Would you consider marrying me instead of my sister?"" She was troubled by the thought of her sister having to enter into an arranged marriage while already having someone she loved, and even though she knew it was foolish, she couldn't help but act. She had heard that the venerable Earl's family was now overwhelmed with debts and unable to manage their vast estate. My sister is not the only one who has inherited a huge fortune from my late father, if only I could marry him... The Earl refused to marry her and turned Rosa away, but...! (Source: Renta!)