While Gray is struggling with an unexpected change in himself, he learns that there are some things that will never change, no matter what happens. [Gruvia, Spoilers for Chapter 411]
Stories about Juvia Lockser, before and after she joins Fairy Tail. Not in chronological order. Implied Gruvia, but not particularly shippy.
What if Juvia's anti-magic poisoning when she defeated Keith had had serious consequences? Her magic gone, she must struggle to find a new place within Fairy Tail and a new direction for her life, while Gray deals with his own feelings about what happened. [Gruvia, diverges after Chapter 397]
They both knew that certain matters would have to wait. [timeskip Gruvia]
When Juvia opened Gray's door to reveal him and Lyon kissing on his bed, she had to wonder if she was imagining things again. [Gruvion very PWP]
After Tartarus' defeat, Gray and Juvia visit the ruins of his hometown together.
Gray wasn't sure what he'd been expecting when Juvia'd brought the idea up to him, but coming home to *this* wasn't it. Not that he could complain too much… [Gruvia, PWP]
After something goes wrong on a mission, Juvia is unable to remember the most important person in her life - Gray. How will the two of them cope with the situation while trying to find a way to cure her? [Gruvia]
A week after Juvia's funeral, Gray returns to Fairy Tail claiming that Juvia's still alive. But is she really...? [Gruvia]