Nokori Ichinichi de Hametsu Flag Zenbu Heshiorimasu - MangaDex
mangadex.org
Alexandra is the duchess of the Kingdom of Tarraconensis. It was only the day before the absolution event that she realized that she was the villainous daughter of an otome game! It's clear that she'll be denounced and her engagement will be broken tomorrow. But I don't want to be condemned honestly! I'd rather show my eyes to the people who despised me! With only 24 hours left, Alexandra begins to make a breakthrough in her desperate situation.

I’m linking the series because I don’t see manga communities talking about it. It follows the otome game isekai villainess premise, but it gives the villainess a chance to fight back, 24h before her demise, as the “memories of someone I didn’t know” flow into her.

Don’t expect this to be high literature, but hey, it’s fun.