User blog comment:Omega natsu2/Chapter 392: You Must Not Forget, Predictions./@comment-4489126-20140709021741/@comment-7418318-20140709083401

It could be Erza and Minerva or maybe Sting and Mard! :P

But joking aside, I think it might be about Natsu and Lucy. They are the only potential couple currently together in the same space right now after all.