Akemi, the top boss of a legendary delinquent girl gang, dies after saving a child and reincarnates into an otome game world. She becomes Rose Sharrett, the story’s final-boss villainess who possesses absurd, cheat-level physical strength. Knowing nothing about nobles or gaming tropes, Akemi decides to live by her own code. While enduring her strict mother's etiquette lessons, she uses her fists to right local wrongs: kicking corrupted nobles into oblivion, pulverizing abusive teachers, and delivering raw physical justice. Her direct, fist-first morality draws the admiration of the Crown Prince and a loyal entourage, even as rival noble ladies challenge her to battle only to get thoroughly smashed.