His Sick Obsession, My Rebirth of Freedom

"In Nora Collins' previous life, she helped divert the pursuing guards' attention from her mistress, Lily Grant. After she lost her memory, she was forcibly married to Ian Carter as a replacement. Once Lily returned, Nora got murdered in cold blood. Now that she's reborn, Nora decisively cuts off all ties with everyone and helps Lily reunite with Ian just so she can leave the city. Unexpectedly, Ian grows possessive of Nora and even ruins his marriage just to be with her…