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Y/n Potter, the twin sister of James, has always been seen by Hogwarts as 'the fifth marauder.' As the well known rivalry between Slytherin and Gryffindor thrives, an even deeper hatred sprouts between non other than Y/n and her best friends brother. Regulus Black. After many pranks and fights between the two, one humane conversation begins to leave Potter thinking... maybe he's not TOO bad?

*･゜ﾟ･*:.｡..｡.:*･*:.｡. .｡.:*･゜ﾟ･*

This is a fem reader x Regulus story so she/ her pronouns will be use (sorry to my guys and non-binary butterflies!) All characters (other than y/n obviously) are owned and created by J.K. Rowling!

⚠️ Contains swearing, smoking, drinking, fluff, and POSSIBLE smutt. Reader discretion is advised⚠️