When Cosette turned five, she was granted an unheard-of profession: ＜Slime User＞.

Slimes are weak monsters, easily eradicated with little effort. How is she supposed to contribute to her domain with this?

As she fell asleep, feeling utterly bewildered, Cosette met a woman named Chiyo in her dream.

According to Chiyo, Cosette is apparently the antagonist who obstructs the protagonist in this story.

What’s more, in the end, she’ll be accused of faking her profession, her entire family will be ruined, and she'll later become a demon and be slain by the protagonists!

Cosette made a decision. If she's to be ruined for faking it, then she simply won't fake it. She just needs to master this incomprehensible profession. She also heard she's moderately good at both swordsmanship and magic. If she's strong, that's good enough.

And so, a mobile fortress young lady was explosively born, trampling everything that stands in her way and leaving nothing behind in her wake.

This is the story of Cosette, a lovely girl who would later earn every conceivable infamous reputation, known by titles such as "Genocide Princess," "Monster Lady," "Dragon Slayer," "One-Man Battalion," and "Head Collector."

※Planned to be quite extreme.

※A devil-fusion of villainess stories with romance elements removed, combined with typical isekai adventure and academy tropes.

※For a niche audience who enjoys villainess stories but doesn't seek romance, and simply wants to read about girls having a lively time. A win-win for everyone.

※Written with somewhat vague knowledge and on impulse, so I hope you can read it with warm eyes as a way to pass the time.