*A/N- Happy birthday again my love, I hope you're happy with this! Just so you know I finished Skeletons and Ball gowns the day I took the ACT (which sucked) but we ended up getting ANOTHER double chapter (which rocked!) (And just so you know it's still that day when I'm writing this A/N and editing this story.) There was a post on tumblr that inspired this one, I can't remember who posted it, or I'd give them credit, but I saw this and just had to write it for you. (This chapter takes place right before the manga chapter "Code Blue.")

Once again, I do not own Fairy Tail.

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The walls around them began to shake violently, capturing Gray's and Natsu's attention. They stopped fighting to look around, confused.

"Is this dump about to fall on our head, Gray?" Natsu asked. Gray shrugged, looking at his fellow members of Avatar.

"The guild hall is sturdy," He said, looking at Mary, who also shrugged.

"I'll go check it out. Take care of your friends from that failed guild while I'm gone."

"You don't tell me what to do," Gray replied. He turned back to face Natsu, raising his fists, only to find that Natsu was no longer facing him. He was kneeling next to Lucy and asking if she was alright, Gray's guild mate lay on the ground, unconscious. "Don't just walk away from a fight!" Gray cried.

"Shut up!" Natsu snapped, standing, still facing away from Gray. His aura began to swell furiously around him, revealing just how much he had grown stronger in the year that they had been separated. "How could you join these people and leave your friends behind? Your new guild mates hurt Lucy!" He spun on the spot, flames exploding through the air around him, melting the stone floors and ceiling of the Avatar Guild Hall. His eyes glowed a vicious red that Gray remembered seeing only a few times in the past, when Natsu was seriously angry.

"That's none of my concern, you aren't my nakama anymore." He looked at the ground when he said this, his dark eyes shining sadly, but Natsu was too enraged to notice.

The building started to shake once more, and Gray glanced at the ceiling, distracted. All of the sudden, a sound tore through the building that made Gray tremble in fear, and the rest of team Natsu grin in triumph. The battle was won now.

"GRAY FULLBUSTER!" Erza shouted, crashing through the wall. "You had better have a damn good explanation for this!"

Natsu threw his head back and laughed at the look of sheer terror on Gray's face. He gulped, trembling now.

"Um, Erza, I didn't expect to see you here," he said, sounding very nervous. Erza stepped farther into the room, her terrifying form seeming to fill the small space. She was dragging a whimpering Mary by the hair, and threw her on the floor at Gray's feet. "I can explain," he said.

Behind her, it was just possible to make out several forms moving through the dust. Natsu squinted to see who it was, and grinned again when a dust covered Jellal stepped into the light, followed by the rest of Crime Sorciere.

"Hey guys," He said, waving. "Long time no see!"

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*A/N- So basically this is my idea of what would have happened if Gray had been working undercover alone instead of with Erza. I just wanted so badly for Erza to burst in and be like, "What the hell, Gray? Prepare to have your ass kicked." Oh well, what happened in canon was pretty great too!