Mage Boyfriend's Best Friend Pretends to Be Him

The story

Lori, of a powerful magical family, loses her sight saving boyfriend Kyle. Kyle tires of her, secretly hires "poor student" Leon to care for her. Regaining sight, Lori dumps Kyle, falls for devoted Leon; they get engaged. Kyle and his mistress accuse her of cheating—unaware Leon is heir to the Duke of Reinholt. Their enemies bring their own downfall. Lori and Leon get their happily ever after.