I Thought It Was A Common Isekai Story

Choi Suna once enjoyed the familiar plot of a novel following Rhyse Sinclair—the virtuous ward of the prominent Rudwick family—who is entangled in a love triangle with the Rudwick sons. The elder Cliff becomes her main love interest, while the younger Killian remains lovelorn forevermore, trapped in a loveless marriage with the vile Edith Rigelhof from an opposing family. Seductive and cunning, Edith is a textbook villainess destined to die at Killian's hands after relentlessly tormenting Rhyse and serving as a spy for the Rigelhofs. When Suna unexpectedly reincarnates as Edith, she finds her new life all too similar to her own abusive past. Determined to change Edith's fate and live, Suna swears off villainy and refuses to let Killian and his family mistreat her by showing them she is nothing like the other Rigelhofs. As she plans her escape while occasionally flirting with the endearingly distrustful Killian, she vows that her reincarnation story will be anything but typical.