Fairy Tail: Portal of Worlds

Team Natsu went on a mission which is to destroy a Dark Portal together with Lisanna who tags along as she came back from Edolas.Then as they arrived at the certain place where the Dark Portal was seen, unexpectedly they were ambushed.Lucy was taken elsewhere and Natsu frantically looked all over for her. The portal they are supposed to destroy vanished and so they all failed. Lucy who was gone made Team Natsu guilty of not being able to protect her.But Lisanna encouraged them that she'll return and so they replaced Lucy and place Lisanna in their team.After some time began their S-class Mage Test. They were attacked in the middle of their test by Grimoire Heart and Acnologia.They were burried in Tenrou.But after 7 years they returned the same as they were seven years ago.Unfortunately Fairy Tail Guild is now a Run down Shack. They still don't have a clue about Lucy.
And naturally they had forgotten all about Lucy.To return their pride back they participated in The Grand Magic Games.