 If you liked
Akuyaku Reijou nanode Last Boss wo Kattemimashita
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 ...then you might like
Akuyaku Reijou wa Kiraware Kizoku ni Koi wo Suru
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They are both about women that get reincarnated as the villainesses of an otome game, too late to change much of the story. Their engagements with the crown princes get broken, and they both end up in a relationship with the "villainous" brothers of the said princes.
The demographic is shoujo, and they both are both focused on the romantic lives of the MCs.