Looking for a manhwa

The female lead has black hair, and blue eyes, and the male lead has blonde hair, and green eyes. Essentially, the male lead conquered the female lead’s home, and then fell for her at first sight, and married her. She hated him until she switched with another person’s soul who gives the guy a chance. There’s a younger brother of the emperor who is always tries to hit on the female lead, and is generally a dislikable person as well.