*Disclaimer: I do not own Fairy Tail or High School DXD.*

Please read the A/N at the end. It contains some information you will want to know about the story.

The Unknown Demon

Chapter 1

"Boss! This is the lookout unit. We found someone near the hills to our south! Please hurry over!"

A man who looked to be in his late 70's listened over a phone he held in his right hand. He wore a black suit that contrasted with the pure white snow he was walking on. He wore black shoes to match his suit and a red tie that matched the color of the long coat he wore over his suit. His grey hair were combed to the side which gave him a very classy look. Despite his age, the features on his handsome face were well defined. If scene in public, he would surely be mistaken for a retired actor.

"Umu, I'll be there in a few minutes. Don't let the guy move." The man replied in a voice that screamed of authority. He seemed to be somewhat angry since someone had dared to trespass on his territory. And his suspicion told him that it was one of those bastards from 'The Hound'.

As the man was walking, several other figures could be seen walking behind him. They all wore black suits with matching shoes and glasses. Six figures in total, they all had grey long coats and hats. What stood out from these 6 individuals was that they were all holding semi-automatic machine guns.

"Gale-san, did we find some goons from The Hound?"

As the old man heard this voice, he kept on walking and looked to his left to find a beautiful women who had appeared out of thin air walking next to him. None of the men in black were surprised at her sudden appearance. "Rose, when did you get back?" The old man questioned the women who had just appeared. "And did you finish the job?"

"Just now. And yes, I finished it without any problems." The young women now identified as Rose looked at the old boss with her blue eyes. She had long beautiful blonde hair that reached her hips and she wore a deep blue dress that reached all the way to her ankles with a cut that ran on the left side exposing her left leg. The dress showed an amount of cleavage that would captivate any man who looked at her. Her feet were adorned with matching deep blue high heels which somehow never made contact with the snow. Yes, she was walking on air close to the ground. How? This women was a devil.

Change in POV

His whole body writhed in pain as he tried to get up. He vaguely remembered what had transpired just a few hours ago. He tried to think more about it but his brain refused to comply sending waves of pain throughout his head. He clutched his head to ease the pain but it only got worse causing him to grab his pink hair to dull out the headache. He once again tried to stand up but lost his focus as he heard voices approaching him.

"-!" He heard the voice say something in a language that he could not understand. He moved his neck slightly to his right to get a better look at the source of the voice. Due to his blurry vision, he only managed to make out several black silhouette. They seemed to be talking among themselves while pointing something at his direction.

'Who are they?' He tried to focus his vision to get a better look at the new arrivals but failed to do so.

"W-who ar-e you…?" Probably due to the surprise of suddenly hearing the person's chopped up words, the men pointed their guns at the fallen man and waited to see any further actions. After confirming no more movement, they slowly started moving closer to get a better look.

"Where is the mongrel!?" came in an authoritative shout which caused the men to suddenly stop and look behind them. Their respectable boss had arrived with his secretary and six elite guards from his personal squad.

"Boss!" One of the men walked back to greet his boss and other comrades.

"This is the man we were talking about. We found him lying there in the snow. Seems like he took a serious beating."

"Didn't call me here since you found a dog from The Hound?!" The old boss's voice seemed to hold a bit of anger.

"N-no. It's just that someone said this guy fell from the sky…"

"Hou…" The boss's interest seemed to have been caught. "A man falling out of the sky huh… Rose, take a look at him."

Rose walked forward with a cat walk which caused some of the men standing behind her to look at her hips. She looked back with a mischievous glint in her eyes and caused all the men's stares to scatter to various directions. "Stop staring boys."

"Huh…" came a tired sigh from the old boss who was all too used to her antics. "What do you think? Does this fellow look like someone from your side?"

"Hmm… I can sense some magic from him but he doesn't seem to be a devil... more like a human with magic?" Rose was confident that he was not a devil but she did not know what else he could be. He didn't seem like an angel or a fallen. "I doubt he has no connection to the supernatural. After all, normal humans don't usually fall out of the sky and survive. Not to mention…" She looked at the snow around the man "…he's melted all the snow around him somehow." This caused the men to take a closer look around him. All the snow seemed to have melted at the spot the man was lying at. The brown from the ground was visible.

"Seems like he's been awake." The boss noticed that the person was awake causing all the other men in black to point their guns at the man ready to shoot at the smallest hint of threat.

The old boss started walking forward and stopped as he stood next to Rose who had a smile on her face. "What's your name kid?" This earned him a confused stare from the man. "I think he can't understand us." Rose confirmed her suspicion by pointing at herself and saying "Rosia Asai". This seemed to earn a nod from the man as if he recognized that as her name. Following suit, the old man ducked down slightly and pointed at himself.

"Normand Gale."

The man stared at Normand for a couple seconds as if judging him.

"Natsu Dragneel."

Authors Note

Alright, the prologue is done. I'm going to change the backstory in the Fairy Tail world a bit.

Here are the changes (They probably won't be explained in the story but they matter):

The Dragon Civil war occurred 800 years ago in Fairy Tail world.

Natsu and Zeref are still brothers but they both thought the other died when they were younger. Same story with Zeref trying to figure out a way to bring his brother back. He doesn't have his body.

Natsu ends up involved with dragons and becomes one of the first three dragon slayer. Still son of Igneel.

The dragon civil war was very gruesome and Natsu dies at the end of the Dragon Civil war which ended 300 years later. Zeref realizes that Natsu had been alive this whole time but only finds out after he really died.

Natsu revived as END. Becomes somewhat evil. The rule of dragons has ended. Now comes the rule of Demons.

Rule of demons ends 200 years later with END being sealed.

X777, Makarov comes across END's sealed body. Frees him. Book is not there so no memories or power.

Rest is same up until Alvarez Arc. This part will be explained in the story so just wait for it. Now next up, High School DxD. I watched DxD a long time ago and have not seen the newest season. Why? I found it uncomfortable to watch. I liked the series and I have nothing against Issei but after only reading Fairy Tail x DxD and Bleach x DxD crossovers, I find it hard to watch it with Issei as the MC.

Later chapters will be have all the main DxD characters in them. Just getting started for now and setting the stage. I have no pairings as of yet for this story so please leave suggestions. Also tell me if I should include Issei. Remember, Majority wins.