A very unusual love story or maybe not so!

What would happen when a new girl managed to stir up the world of the Marauders. How would Sirius' family react if he fell for a Muggleborn who bikes, wears shorts and crop tops, plays rock guitar and calls Voldemort Voldy dearest? And will she even fall for him or even worse will he? Oh and she punches death eaters, something that might give dearest mother Black a heart attack!