[JoJo's Bizarre Adventure] A Gentlewoman's Guide to Spiritual Guidance

Born into a noble family, Joanna was expected from a young age to uphold the family name and become a proper lady.

From the day she first learned to read, Joanna received from her elders the thick book of etiquette her mother had written for her herself.

Unlike her brother, who loved to cause mischief and could never sit still, Joanna was young but always tried hard to keep herself in check and live up to the book's ideal of a "proper young lady."

"I must become a proper lady!" little Joanna firmly believed.

After her mother died in an accident, she clung even more tightly to the hefty book in her hands, following her mother's expectations with ever greater devotion.

That didn't change even when an annoying adopted boy came to live with the family, one who always made her cry.

"Rule XX of a Lady's Code: Always wear a pleasant smile, even when the other person isn't someone you like."

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The female lead is Big JoJo's younger sister, and she really is a proper lady (emphasis added). This is a very cliché story about a noble lady and a poor, wicked boy, but since the male lead is that inhuman Dio, maybe it won't be quite so cliché after all (?)

Anyway, Big JoJo now has another reason to beat the hell out of Dio. A cause for celebration.

Premise: Love and peace