Why Raeliana Ended Up at the Duke’s Mansion review

I recently viewed an anime titled "Raeliana at the Duke's Mansion". The plot revolves around Rinko Hanasaki, who after her death is reincarnated as Raeliana McMillan. Raeliana, a minor character in a novel previously read by Rinko, was engaged to Lord Francis Brooks, who eventually killed her. To avoid the same fate, Raeliana attempts to break off the engagement, but Francis refuses.
In order to evade her destiny, Raeliana seeks help from Duke Noah Wynknight, the male protagonist in the novel. She uses her knowledge of the plot to make a deal with him: she will not expose his secrets if he agrees to act as her fiancé. However, getting involved with a duke who reveals his true colors only around her may entail more than she initially bargained for.