A brief description of the manga Otome Game No Hametsu Flag Shika Nai Akuyaku Reijou Ni Tensei Shite Shimatta…
When I applied myself to the stone, I remembered my past life. I, Katarina Claes, an eight-year-old noblewoman, formerly an ordinary 17-year-old otaku schoolgirl, was caught… in an otome game that I had spent a lot of time in my past life. And who am I in the script? The villain, the main negative character! And bad guys don’t usually have a happy ending… Shall we see what happens?
Would be 100% better if it ended after the conflict with student council president was resolved. After that point, it’s mostly just rehash and what was once charming is now tiresome. 
As 
PlatedPangolin stated there, the TL of this chapter 25 is cräp.
So, off I go to mangadex looking for a better one. I searched for:
Otome Game No Hametsu Flag Shika Nai Akuyaku Reijou Ni Tensei Shite Shimatta
If you have becomea fan, it might be worth looking for them.
Dunno if they are any good, but they are on my reading list – for now.
Would be 100% better if her harem was just all women instead of mostly men.
I’m only to chapter 7 and her harem (I can’t in good faith call it a reverse harem since a third of it are chicks) is already firmly established.
I’m guessing the comments below are from removed chapters that defaulted to here (back when the site’s comments ran a bit differently) so here’s a review as to what to expect in this.
Mc is accidentally charming but denser than a black hole, she winds up accidentally creating a mixed harem. She has the entire main cast pining for her including the women.
Though I still find it entertaining. I’m not gonna say it’s the best but its honestly a bit above average in terms of the “mc reincarnates as the villainess of a game so she tries to avoid death using knowledge of said game” genres.
I never knew this was a harem XD
I kinda like it. Sure, the FML is denser than a neutron star, and seems to have almost zero romantic interest in anyone, but it’s wholesome and I like the characters.