Eonnineun Yeodongsaengeul Bareuge Kiwoya Hamnida

Her favorite character's fate is in her hands.
A woman's dream comes true when she transmigrates into the body of Rachel Agnes, sister of Liz Agnes — her favorite story villain. Her mission? Ensure that Liz goes down a better path. Yet, things become more complicated than expected, especially when a notorious archduke is thrown into the mix...
(Source: Manta)