Try Kitsune Serum!

Louise: "Hi!  I'm a fluffy kitsune now!"

Lucy: "You, too, can be a kitsune, with our amazing kitsune serum."

Lucy:  "For just three easy payments of $999.99, you will get cute, fluffy fox ears and a tail, just like our volunteer here, Louise."

Lucy: "Side effects include: aches and pains as your new ears grow in, shedding, loss of appetite followed by increased appetite, increased strength,  random foxfire, complete fox transformation, or possibly cat ears.  Oh, there's no way to reverse it currently, unless you're also a magical girl.  Use at your own risk.  But never mind the legal mumbo jumbo, floofy tail!"  

Haha! "But never mind the legal stuff.... fluffy tail!"