Light or darkness (fairytail Nalu fanfiction)

What happens when Lucy have to choose between 2 things. Either become the princess of dragons and fight with side my them or becoming the princess of demon and destroy fairytail. Her first crush is on the demon side, but what happens when she finds someone new who is on the dragon side. Worst of all, both sides are going to finish the long war between them and both need Lucy's help. Which side will she choose? Read and find out:)