The title "Why Raeliana Ended Up at the Duke's Mansion" refers to a South Korean web novel written by Milcha, which has been adapted into a webtoon and an anime series. The story centers on Eunha Park, who dies in modern Seoul and is reincarnated as Raeliana McMillan, a supporting character in a novel. In the original novel, Raeliana is destined to be killed off. To avoid this fate, Raeliana makes a deal with Duke Noah Volstaire Wynknight to pretend to be his fiancée, hoping to change her ill-fated ending. Her knowledge of the novel's plot and the royal seal plays a key role in her making this pact. The series explores whether Noah will help Raeliana avoid her doomed future or if history will repeat itself.
In summary, Raeliana's reason for ending up at the duke's mansion is to save her life by entering a fake engagement with the duke, leveraging her prior knowledge to change the story's outcome.
