転生侯爵令嬢奮闘記　わたし、立派にざまぁされてみせます！

One day, the marquess's daughter, Julianne, regains her memories of her previous life and reflects on her behavior in this life. Extravagant, bullying her siblings, stalking her fiancée - She realized her devotion to wickedness, combined with her vile personality and fattened appearance, perfectly mirrored the villainess of a novel she had once read about in her previous life. If I’m going to be taken down in the future, then I might as well clean up my body and soul! With this thought in mind, her new diet and devotion to her family had begun! (Source: Alpha Manga)