Love to the end is hard to undo

As a child, Freya, an Omega, lost her sight while saving a young boy. She was later rescued by a mysterious guard, whom she recognized and fell in love with. When her sight is unexpectedly restored, she discovers to her shock that the guard is none other than the young lord of the Southern Territory—and that he has been approaching her while secretly pining for her stepsister. So she pretends to still be blind and agrees to an arranged marriage to the strongest Alpha, making the young lord personally escort her to her new home. Little does he know that the bride he's seeing off is actually the girl he truly loves—the very one he's been searching for all along.