My Sister Who Regressed Wants My Fiance

Betrayed by a father's coldness and a seasoned sister's manipulation, Nereis was forced into a marriage of convenience. But the game has changed. Her sister, armed with the same knowledge of the future, has returned from the past to steal the fiancé she once discarded. As the Duke's unexpected affection grows, a dangerous game of obsession and betrayal unfolds. Who will survive this twisted cycle of fate? Dive into the chapter 1 now!