Disclaimer: I neither own the song nor do I own the translated lyrics. I also don't own fairy tail. I figured that I should include this.
Basically what happens in this AU is that Acnologia almost kills Natsu and everyone is blown into the ocean. Gray tries to save Natsu, but can't reach him and almost drowns. Later, when he is awake again, he receives notice that Natsu and many of his comrades had died leaving him alone. Sting was Natsu's pseudo-brother and when Natsu died, he was crushed. He keeps going to school and Gray starts teaching him. Gray ignores him and doesn't help because he feels guilty for not saving Natsu and rejects everyone who was connected to Natsu. Sting grows to resent Gray and they develop a mutually hateful relationship. At the end, their relationship is repaired and Gray begins to help and look after Sting again.
