I Twisted the Original Plot and Ended up Seducing the Northern Duke

The protagonist finds herself reincarnated into her favorite romance-fantasy novel—unfortunately, as the foolish villainess doomed to a tragic end after being engaged to the crown prince.Determined to survive, she decides to twist the original plot. But soon her father unexpectedly brings her an engagement contract not with the crown prince, but with the northern duke—the very male lead of the original story.To make things more complicated, the duke begins openly courting her, turning her carefully laid survival plan upside down..