I Reincarnated as a Horror-Themed Villainess with Indescribable Tent**lese

One day, I woke up to find I’d reincarnated as the villainess of an otome game. But I wasn’t just some rival for the protagonist’s love—I was humanity’s sworn enemy, a eldritch horror masquerading as a noble lady. Beneath this human skin lurked an unspeakable monstrosity. According to the story’s plot, I’m destined to be defeated as the final boss by the main characters… So now what?