Till we meet again

Wend Sting was 12 years old, he was fighting two dark mage on the forest, but then Lucy came and save him, since that day they became friends but wend Lucy accept to be Cana partner for the promotional trivial to help her became an s-class mage. She disappear with her friend because of Acnologia. 7 years later Sting meet Lucy again at the Grand Magic Game. What will happen now?