I, Who Was a Maid, Am the Grand Duchess From Today?!

Luna Ellen, a maid to the daughter of Marquis Lutenberg. Having lived her entire life like a shadow, her fate is completely overturned on the day of her mistress's wedding. When she opens her eyes, she finds that her soul has entered the body of her mistress, Adelia. To make matters worse, the man who is to become her husband is Grand Duke Wallenstein—the Empire's greatest beauty, renowned for his cold-heartedness. Unable to flee or confess her true identity, Luna enters the wedding hall in Adelia's stead and ultimately takes her marriage vows as a "fake bride." “Acting like a loving couple isn't enough; I have to conceive an heir within a year? No matter how I think about it, this is i...