[whoknows]

Hehe, just thought of something else as well too: if Natsu or any guy that consumes these candies, perhaps their muscles deflate and they regress to become a child?:P

When the girls do come back, Natsu and Grey will ask how they become so large. Erza explains to them but as usual, Natsu, didn't listen to Erza and decided to take the candy out of the jar from Wendy's arms and gulps it down.

After that, he regresses in both height and muscle, becoming a child without affecting his mental age. Then Wendy, shows Natsu, how it is REALLY done. She takes the candy out of the jar and gulps it down before Erza and Lucy can stop her. She grows even more than before but with an additional growth going towards height. With a shock from everyone, Wendy grabs Natsu and hugs him a bit tightly and says something along these lines " " Don't worry, little Natsy, I'll be your big sister from now on".

That should be the second chapter.

Then the third chapter will be about the other girls...as Erza explains to Natsu and Grey, three girls: Juvia, Levy and Mirajane who is spying on them comments on how it is possible for the three of them to be as strong as they are. They all go back to Porlyusica's house and ask her if it is possible to give them what Erza had and she accepts their requests and gives them the jar, but a larger size jar with more candies in them.