Lucy and Erza did not like this.

Gray and Natsu were once again fighting over who was stronger, and had once again dragged the entire guild in to it. So, the result was the entire guild was upside down and was fighting.

It had all started with Natsu entering the guild to ask for a rematch after their last draw and Gray throwing a chair at him. Consequently, Natsu burned it to a fire ball and the other turned it in a popsicle, sending it crash somewhere, to what the fire mage reacted by throwing a table at him, ending up angering the ones who were using it, who also started fighting. This was how the fight got guild wide: people were quietly watching the fight and if someone bothered them or provoked them they would join in. By this point the only ones out of the confusion were Mirajane, Erza, Lucy and master Makarov. The former two would also be in it had it been a few years before.

When the sun was no longer visible and entire guild finally settled down, Makarov decided that this could not go on in such a large scale. Sure, fighting and destroying things was a daily routine to the Fairy Tail mages, but this was getting out of hand! The repair and the waste costs were astronomic! So, he decided that the ones to blame for the large scale destruction were Natsu and Gray. And according to Makarov's law, they should be punished. He just had to wait for Levy to return home from her mission.

---The next day ---

A beautiful clear sky sunshine full day arrived and at the Fairy Tail guild could be heard the abnormal silence and ---

"GAAHHH!"

Screams of agony.

"What the hell did you do!?"

"Me? It was you you idiot! Ow! It's too hot!"

Gray and Natsu screamed in despair as they looked at themselves. They finally settled with screaming "This is all your fault!" at each other.

"What's going on this early in the morning? Why are you screaming? I could hear you from the bottom of the street!" Lucy said as she came into the near empty guild, due the early morning hour they found themselves on, face still tired from the sleep.

"Lucy! It's terrible! I'm Gray!"

"Yes, yes! And more importantly I'm Natsu!"

She looked at the two with a confused expression, shrugging it off and heading towards the request board.

"Yeah, I already know you. We have been introduced before. Like that's news." She said uninterested looking at board. "Now what mission should we take today?" she mumbled.

Natsu grabbed her by the shoulders and made her turn around so that she could face both of them.

"Pay attention Lucy ok?" She nodded, granting him the benefice of the doubt. They were acting really dumb. Well, dumber than usual. Maybe they had some kind of act pulled together? But the two of them together? Not normal. This could be entertaining. "I'm not Natsu, I'm Gray."

"And I'm Natsu, not Gray."

As she looked between the two she was trying to assimilate what had just been told to her. Natsu was saying that he was Gray and Gray was saying that he was Natsu? Then something clicked in her head.

The whole city was shook yet again by another scream.

"WHAT!?"

She grabbed Natsu by the collar and started shaking him (even though she was really shaking Gray). "What the hell have you done!? You activated Changeling! Natsu you idiot!"

"L-Lucy I'm not Natsu… I'm Gray."

She dropped him down. "A-ah, sorry Gray, my fault."

"Why did you have to assume it was my fault from the start!?" Natsu yelled waving his hands in the air.

"Because some way or another it's always your fault, you moron!"

"What's that you ice bastard!?"

"You two stop arguing!" She said before things could escalate to another level different than just grabbing chairs and throwing them together with the insults. "This is no time for that! You should be focused on how this happened and how to solve it! Do you have any idea how this happened? Natsu? Gray?"

The two mages dropped the chairs that they were holding and chose sitting on them, instead of throwing them. After a few moments contemplation they both answered.

"I have no idea."

"You took so long to give that answer!?" she screeched.

"Well, it's the truth. When I woke up this morning I was at flames head apartment and was like this."

"Yeah. Me too. I don't know how this could have happened."

'We are doomed!' Lucy thought pulling at her hair: "Neither of you can fight in this condition. And both of your abilities are useless! You can't even defend yourselves!" she started pacing in the room while they looked at her walking from side to side. "How can we go on missions like this!? I need the money! How am I going to pay this month's rent!?"

"Ah… So that's what she really cares about." Gray said from Natsu's body, arms crossed and leaning on the counter.

"Maybe you should ask master about it." Mirajane said from behind the counter, having been ignored so far. "He may know something about it."

"Ah, Mira-san!"

"Forget it! If he didn't know anything last time what gives you the idea that he'll know this time?" Natsu said shivering from the unusual cold sensation around him and remembering the time everyone switched places at guild, starting with him, Loke, Gray, Lucy, Happy and Erza.

"That's where you are wrong Natsu."

Everyone turned to look towards the source of the familiar voice.

"Old man!"

"Master!"

"So you do know how to reverse this thing?" Gray asked in hopes of getting out of this body the soonest as possible.

"Yes." And before everyone even had a chance of starting to get ready and shout "YAY! We're saved!" Makarov quickly added "But I'll not do it."

"What!?!"

"Old man! C'mon!"

"This is all your fault!"

"How's this my fault!?"

While Natsu and Gray kept arguing, whining and complaining, Lucy asked the smartest question that could be asked at the time. "Why?"

The duo immediately stopped their bickering, quiet down and looked at the master demanding explanations. Even Mirajane looked from what she was doing, curious as why master wouldn't undo Changeling and would keep torturing them, even though she had a pretty good idea.

"Because I don't want to." He waved his hand in the hair dismissively. Natsu and Gray seemed ready to burn and freeze the tiny old man right there and now, but seeing that this was Master Makarov, don't do that probably would be the smartest idea. He would make sure to make them regret that for the rest of their lives. Putting out the fact that they couldn't even use their powers correctly at the moment, of course.

After contemplating that option, staring dumbly at the old man for two minutes and then glaring angrily at him for another three, they huffed and turned around, leaving Lucy to stare between their back and the master.

"Che, whatever!"

"Yeah! We'll just ask Levy again!"

"She won't do it." Master stated calmly making the two halt in their steps and return quickly to the place next to him.

"Why not old man?!" Natsu asked getting really tired of the situation.

"Because she was the one who casted it in the first place."

"What!?" This seemed to have brought Lucy out of her trance, since she had been mumbling about "rent" and "money" for a while now. "Why would Levy-chan do such a thing?"

"Because I told her to." And since they all were tired of "why's" and "because's", he decided to explain the whole thing at once. "You see the two of you have been arguing and fighting over every single little damn thing and a lot more often than usual. And because of that the guild is always in need of repairs. I asked Levy to cast the spell on both of you last night after she came back, so the two of you can walk in each other shoes and hopefully get along better."

"Old man! You can't do that! There must be a rule against it or something!"

"Yeah!" Gray agreed with the fire user nodding his head.

"I can do whatever I want! And I warn you, it's either this or "that"!" he threatened emphasizing the word. Hearing the mention of "that", both mages palled and started agreeing with the punishment cast on them, without complaining anymore. This is while Lucy kept thinking 'When the hell are they going to tell me what "that" is!?', until she remembered the rules of when the spell was cast.

"But master! If they don't return to the normal in less than…" she looked at the clock that was magically lying in the room ".. five minutes they may stay like this forever!"

Upon seeing things this perspective, the two involved started panicking around the room, almost preferring "that" to this punishment, and screaming:

"Ah! I don't want to have a pink head for the rest of my life!"

"I don't want to be a stripping freak with droopy eyes!"

"Nonsense!" The master said hitting both upside the head with his wooden cane. "If that was the case the spell would already be irreversible by now. I asked Levy to modify it so it will be reversible at any time. We even tried it out!"

'Tried it out? How?' "How would that even be possible? Wait, never mind. So are you saying that they are going to live as each other using the total opposite of their powers?" Lucy asked leaning over to take a better look at the two wizards on the floor.

"Yeah, that will be their mission adding to their normal ones."

"This is going to be living hell. And I'm the one that's going to have to endure it." Lucy mumbled the last part and sighed, defeated. "For how long?"

"That now…" he smiled mischievously and both Lucy and Mirajane knew that nothing good, and a very, very, very long time awaited the two lying on the floor.

Hi there! Don't ask me why I want the two of them to switch bodies, I just want to. This is a multi-chapter fic, inspired by episode 19 of the anime as you can guess and I hope that so far I have kept all of the characters are "in character". Sorry if there are any grammar mistakes, but English is not my first language ^^"

Thanks for reading it!

Disclaimer: I don't own Fairy Tail. Hiro Mashima does.