Akuyaku Reijou ni Tensei Shippai shite Kachi Heroine ni Natteshimatta: Akuyaku Reijou no Ani to no Kazoku End wo Akiramete Koibito End wo Mezashimasu

In her past life, she was a girl who adored otome games and always dreamed of reincarnating as her favorite villainess after death. But when her wish was finally granted, she was met with a shocking truth—she wasn't reborn as the villainess, but as the story's main heroine! "No, this isn't what I wanted! This isn't my place!" Her original plan was to live peacefully as the villainess's sister, staying by her side without getting involved in any unnecessary drama. But now that she's the heroine, she has no choice but to take action and rewrite the course of the story if she ever hopes to achieve the ending she truly desires! (Source: Kadokawa, translated)