Hello, otaku. My name is Kyubey! I sense that you have the potential to become a magical girl. Won't you make a contract with me? I'll grant you any one wish. Accept, and you will become a magical girl regardless of your gender or age. You can't wish for more wishes or anything in bad faith like that.
Of course you'll have to fight witches too. How about it, do we have a deal?
Seriously, you won't regret it! If you're willing to take the plunge, tell me your wish in the comments below!