Kanojo ga Koushaku-tei ni Itta Riyuu

Eunha Park thought she had another chance in life when she woke up in the world of a novel. The only problem? Raeliana McMillan, the character she was reborn as, is destined to be killed by her fiancee! For the sake of her survival, she comes up with an idea: contract a fake marriage with a man more powerful than her future boyfriend. But when that protection comes in the form of Noah Wynknight, the duke with a warm smile and a cold heart, Raeliana realizes that she might have made a mistake…she will regret this plan, won’t she?