What if Mavis actually became an active member of Fairy Tail after Oracion Seis? What if she was sealed away by Zeref? Eventual pairings, though I don't want to spoil the story by pointing out all of them. Navis is the only one that is obvious right off the bat; it'd be best not to assume others at the beginning. Rated M for possible future content and to be safe. More info inside.