언니는 여동생을 바르게 키워야 합니다•

Sistervention

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)