I don't know any manga that has this plot but I once read a webtoon with about the same thing. Here's the link: https://www.mangago.me/read-manga/i_became_a_level_999_mastermind_demon_king/
I'm not sure if this is the one you're looking for and I'm really sorry if it isn't
hi! I don't really know any manga that has this specific plot but this site might help you narrow your search!
https://www.mangaupdates.com/series/advanced-search
hopefully you can find it soon thru this database if they have it

trying again
so basically I don't remember a manga
She reincarnated into a videogame or story villainess, I don't remember but I think her father was a duke or someone high ranked, I say this because the crown prince shows up in one of the scenes, anyways
the only thing I remember from it is that instead of trying to change the villainess future she decides she's going to be the best villainess. she doesn't realize that she's actually being super fare with her judgments and criticism.
in another scene she asks her brother to learn swordsman ship, he tells her if she does this workout thing she can, she does it, asks again, and brother gets angry and tells at her no out of not wanting her to have to learn it, basically out of love for his sister.
anyways please help
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