πI recommend to you two ancient romance novels, Poison Hands Medical Concubine and Substitute Marriage: The Violent King's Favorite Concubine. The main character of the former was the descendant of the modern Poison Sect, who had transmigrated to become a substitute princess consort and started a fantastical love story with the Cold Charm Prince, while the latter was about a substitute maid who became a useless princess consort and was doted on by the black-bellied Prince. These two novels both had endings. I guarantee that the ending would be one-on-one. I hope you will like my recommendation.π