Answer: The myth of the German werewolf ( I made this and you are welcome to take credit for this)
Explanation: Werewolves are secretly living as humans in Germany. They are not hairy beasts like fokelore describes, but instead shapeshifters who can shift at will to a majestic wolf. They have been hunted to extinction but one werewolf is the key to saving the race. She can breed with human and have viable offspring, and she lives next door. The myth is her existence and the existence of werewolves.