I Tried to Rewrite the Original Story, But Ended Up Seducing the Northern Grand Duke

"Am I... about to ruin everything by changing the original story?!" I found myself transmigrated into my favorite romance fantasy novel, the one I loved so much I even reread the side stories over and over. But of all people, I became the pitiful villainess daughter of a Duke, the one destined to get engaged to the Crown Prince and meet a tragic end. To survive, I swore to rewrite my fate and steer the story off its rails. But then... "Liri, I’ve brought an engagement contract with the Northern Grand Duke!" A few days later, my crazy father barged in, waving around an engagement contract, not with the Crown Prince, but with the Northern Grand Duke himself. "You’ve loved me for a long time, my lady." To make things even worse, the Grand Duke himself showed up in person. But the real problem is... The Northern Grand Duke, the original male lead, is hell-bent on seducing me. "Do you know how much your eyes throw my heart into turmoil?"