The Cast

When James Potter has a secret sister that only the marauders know about finally arrives at Hogwarts in the marauders sixth year. After attending Beauxbaton for the first four years of her schooling Y/N Potter finally decides that it's time for a change in scenery.
Or in which Y/N Potter falls for the Slytherin Prince that her bother and his friends hate.

James's sister x Regulus Black

Regulus Black x Reader

Disclaimer - I do not own any of the characters in this book only the plot.