…Yeah.

I'm starting another story.

…

Okay, so this one just popped in my head a while back. So I've always noticed stories that tend to have Natsu going crazy about his dragon instincts because he's a dragon slayer, but what about his demon instincts? From what I've seen no one does anything about the fact of him being a demon and focus more on his dragon slaying magic, despite that's only his magic while he's actually a demon.

So now this exists. Knowing my luck this may end up being cringe worthy, edgy, embarrassing, and probably inappropriate. This may be more of a T rating, but just to be safe this will be M, just in case.

Enjoy, or not, I don't care you all have your opinions.

Everything belongs to their respective owners.

Chapter One: Getting away with murder

Natsu clubbed another dark mage's face in with a punch as he fought off the dark guild. The pink haired Fire Dragon Slayer was currently on a mission to take care of a dark guild that has been terrorizing a town and kidnapping its civilians. He was the only one present though, as the rest of his team was doing something else at the time. Erza was on an S-Class mission, Lucy paid her rent for the month so she didn't need any money at the moment, and of course Natsu wouldn't ever ask Gray for help, and Happy went with Wendy and Carla on a mission to try to sway Carla once again.

'This is so boring,' Natsu thought to himself as he punched another dark wizard in the face sending them to the ground, 'I wish this was more exciting. Hopefully whoever is in charge of this sorry excuse of a dark guild is more challenging.' He hoped, kicking another dark mage in the stomach, sending them flying.

He then headed to one of the doors that lead deeper into the building after he defeated everyone in the main hall. With his sense of smell thanks to his Dragon Slaying magic, he had no problem tracing down more people in the building.

"Alright, let's see where you lead." Natsu spoke to himself as he burst through a door which leads him downstairs. He made sure to deal with any dark mage that he came across as well. Maybe this is where all the civilians they captured were being kept?

The pink haired male eventually found himself in going through an underground passageway. Following the scents he picked up, he figured it wouldn't be long until he found the remaining dark wizards and kidnapped innocents.

Natsu was right as he entered a large room with a couple of dark mages watching over the town's civilians in cages to make sure they didn't try anything. The dark wizards noticed the pink haired male too late as he knock them out.

The citizens cried in happiness at seeing the Fairy Tail mage. He then broke the cage doors open, allowing them to exit.

"Are they anymore?" Natsu asked one of them, wanting to make sure that everyone was here before he led them to safety.

"Some of us were taken deeper underground. We don't know what these criminals are doing with them though," An older man informed him, "Please, you must save them!"

"Don't worry about it. I'll go get them," Natsu assured them all with a smile, "You all get out of here. I have cleared the way." He told them before he went through another door that leads deeper into the dark guild base.

Natsu ran through the hallway. As he got closer, he could slightly hear some noise due to his enhance hearing, though he didn't know what was going on though.

'No matter, I'll still kick their butts!' Natsu thought to himself with a grin. He was going to go save the rest, and send these dark mages to jail! And maybe blow up their whole guild hall while he was at it. He eventually arrived at a large door, to which he immediately kicked down.

However, his eyes widened in horror by what he saw.

In the large room, blood could be seen splattered all over the floor. Many tables had fresh corpses of people with their chests and stomachs opened up, revealing the organs and intestines of the bodies. All kinds of torture devices were seen hanging on the wall and from the ceiling as well. Not to mention the stench of decay and rot filled the room. But that wasn't all however. Bodies of the civilians were also on the floor, mainly women who were naked, and covered in blood and some white substance as well. Every body in the room also had their eyes widen in a permanent state of horror.

All in all, Natsu was frozen at the sight of it all.

"Well, well, well," A voice got him to snap out of his thoughts as he looked up to see the master of the dark guild. Blood was splatter all over his body, as a corpse of another woman was lying on the ground next to him, naked as well as stab marks covered her body bleeding out onto the floor, "It seems like someone's interrupting my fun. It's rude to barge in when someone's busy you know." He stated with a crazed grin. His words got Natsu to completely stare at the man as his hands began to shake from anger and disgust at the sight around him.

"You…," Natsu started to say before he dash at the man, getting the dark guild master to be surprised by the sudden movement, "MONSTER!"

The dark guild master couldn't dodge as he was slammed into the wall by the enrage dragon slayer, bursting down the wall as the both of them are now in another opened up room. This was good, as the dead defiled bodies as well as the awful sight and stench of the last room wouldn't get in Natsu's way.

The guild master of the dark guild managed to slam his fist into Natsu, getting the pink haired male to get distance from him. Natsu then fired off a Fire Dragon's Roar at the dark wizard, who couldn't dodge it as he yell from the impact of the attack. The man got back up before he sent a slice of Wind from his hand at the Fire Dragon Slayer, showing that he processes Wind Magic. Natsu simply side step the attack as he ran in for another hit. Natsu flung his fist right into the man's stomach, getting him to cough up blood and crashing into the ground.

Natsu glared at the man on the ground with such hate and anger that it could kill a man. Never had Natsu seen a sight of the innocent people now dead with their bodies defiled by this psycho. The stench and the images stuck to him. And that alone angered Natsu to a new point.

"How dare you…," Natsu walked to where the man was, as the dark guild master tried to get back up despite the pain he felt. Natsu was now standing over him, but then he squat down to get closer to him, "What kind of sick mind are you? To done those things to those people?" Natsu questioned, getting the man to be confused by how quiet the pink haired male was.

But then Natsu swung his fist into the man's face, getting him to cry out from the pain. Natsu didn't stop however, as he continued to strike the man's face with his fists over and over again. The sounds of his punches on the dark guild master were heard throughout the room.

"They haven't done anything to you! How could you do that to a fellow human being?!" Natsu shouted, continuing his assault on the man below him, not caring about the blood covering his fists from the force of his punches. If Natsu wasn't so angry, he would have realized the brutality he was doing to the man, but his anger clouded him of that. The dark wizard could only cry out from the sheer pain he received from the punches, his jaw at his point broken as his face bled all over.

Natsu ceased his punching as he proceeded to kick the man hard, sending him flying into the wall. Despite the injured state the dark wizard was in, he managed to get back up. Natsu gritted his teeth in anger as he saw the man managing to smirk despite his now broken jaw, as he was trying to say "Is that all you got?"

Natsu roared in fury as he charged at the man with a fully powered Fire Dragon Iron Fist. Every fiber of his body screamed at him to put this man down. He closed in as the man widens his eyes from the Fairy Tail mage about to hit him. And then…

*Cue "Getting Away with Murder" By Papa Roach*

With a roar of fury, Natsu's fist went completely through the man's stomach, making him cry out from the pain as Natsu's fists was still rammed into the dark guild master's now bleeding stomach. However, if one looked at the pink haired male, they could see a large grin on his face, as if he liked what he had done to the dark wizard. Natsu then pulled his now blood-stained arm out of the man, as he fell lifeless to the floor.

Natsu was taking big breaths as the adrenaline in his system faded away. But then it died down, his grinning face slowly warped into one of a terrified look, his eyes widened in shock as the realization of what he did struck him.

"D-Did I just…" Natsu questioned as he begun to shake a little. He looked at his blood stained hands with wide eyes. He just killed a man. Even though the man had done horrible things, he still killed a human being! That wasn't what Fairy Tail does! He had never done anything like this before. Why did he do it now? Was he caught up from the nightmare inducing sight of all the dead opened up bodies and in his anger to noticed?

The worst thing however, was when he did that he… enjoyed it. Why did he enjoy that? He shouldn't have enjoyed putting a hole in a person's stomach! He shouldn't have enjoyed ending someone's life!

Natsu begun to back away from the corpse of the man, terrified of what he had done. Tears threatened to fall from his eyes due to what he did.

He then turned around and ran from the body.

So what do you all think so far? It probably sucks I know, but hopefully it will get better along the way.

The whole thing of this story is him trying to resist the demonic urges to kill and the like he will get, though there will be times when he's completely set loose. I figure I tell you all that in case anyone's wondering.

See you all next time, whenever that will be.