I Dream of Health, Wealth, and a Long Life (Pre-serialization)

Lady Adrianna isn't just a noblewoman, she's the side character in "Ramona's Tale," the favorite novel of an ill peasant girl who died tragically young. This is her second chance at life, and she's not reliving that tragedy! An evil stepmother's not gonna stop her, and Rian slowly gathers handsome companions along the way... the calculating imperial prince, the friendly count, the mysterious and brooding demon prince. After all, she is determined to live a long, healthy, and wealthy life!

(Source: Tapas)