E.N.D. [A NaLu Oneshot]

Natsu decides to leave Fairy Tail and everybody decides to bring him back, even if it is to be done by force. Natsu falls into the darkside and Lucy decides that it's her time to protect him. What would become of Fairy Tail with the conquest? Would Lucy be able to save Natsu? What happens to Fairy Tail as they meet fate's END?