Dancing with the Lord of Crime

Jasmine Seraphina Potter never expected to be reborn in an Anime world as a female Sherlock Holmes with a git of a brother. But she loves her new brother anyway.

Nor did she expect to catch the eye of the fabled Napoleon of Crime in all of London....

Professor William James Moriarty.

Well, might as well enjoy this dangerous dance while she can...

And Watson is the little brother she never had.