A Replacement Wife, or A Portal Traveler for the Dark Prince

One unfortunate incident, and I was swept into another world—into the fragile, sickly body of a fair princess. Her new husband is none other than the Prince of Chaos himself. He is powerful and dangerous, the strongest mage, and—what’s more—an charming scoundrel! We struck a deal. All that’s required of me is to hold out in this new body for a little more than a month without revealing my true nature. And, at the same time, somehow survive the endless intrigues and the struggle of darkness and light. Nothing—where have ours not disappeared?! I will help avoid a war of darkness and light, survive, and definitely return home!