Nalu- In Love With A Creature

((EVERYONE IS EITHER A SEA CREATER OR MERMAID)) Theres a war going on between Sea Cretures, and Mermaids. The Warriors Known as Fairytail fight them. And the creature warriors are known as Darkness. But one creature Known as Natsu, Captures a run away princess that is part of fairy tail, Lucy. A rival love springs bet...