The Werewolf of Fairy Tail

Werewolves are real!

When team Natsu went out on a mission, Lucy gets kidnapped. Natsu goes off to try and find her, only to find torn up clothes and blood. And her keys missing.
They later found the ones who kidnapped her, and found them dead. They go back to the guild to tell them the bad new.
What will happen when Natsu finds out Lucy is alive? And how will he react to how different she is now?