One mistake with drastic consequences

It all started how all missions should go with team Natsu. Natsu getting sick on the train, Gray laughing at how pitiful he is and Lucy reading her newest book. Now I'd like to say the mission went perfectly, but that's never how it goes. Somehow Lucy was turned back into a child, with no memories of what happens to her in the future! Natsu is the only one who can actually get near the little girl,so he's charged with taking care of her. What will happen? Will buried feelings be brought to the surface because of this "problem"?