Living with the Devil

"Text" = Regular speech

"Text" = Thought

"Text" = Demon/very, loud deep voice

Chapter 1: Journey to a devil

Disclaimer: I do not own Naruto or High School DxD. If I did, I wouldn't be putting these up for free.

Many years ago, the Valley of The End was forged in the clash between Madara Uchiha and Hashirama Senju. Their power had carved a great scar in the land, their fight reshaping a great tract of land giving birth to the now iconic valley. The great waterfall was flanked by statues of the two titans of the shinobi world, built to forever mark the site of one of the most destructive battles in history between two men. Now however, another battle, between two young boys was being fought, less destructive but no less intense for the two fighters.

On one side of the valley stood Sasuke Uchiha. Gone was the image of the proud, handsome young boy that girls swooned over, his appearance changed and distorted by the curse mark that he drew ever more power from. His once fair skin now replaced with an ash grey colour while his once onyx eyes were now black with crimson irises. The most unusual aspect of his eyes though was the three tomoe present in each eye, a clear sign of the sharingan, the legendary dojutsu of the Uchiha clan while a black, four pointed star adorned the centre of his face. From his back sprouted two giant webbed hands, a cruel mockery of wings. His clothes were a black shirt with white trousers, although both items would likely need replacing due to the muck and grime they had accumulated. In spite of the fierce fight he was in, his face remained impassive with only the barest hints of a smirk gracing his lips.

The blonde in question was one Naruto Uzumaki. Despite the bright orange clothing that he wore, the major attention grabbing point was the red cloak of energy that covered his form. His once startlingly blue eyes dyed a bloody red with pupils elongated to slits. These, combined with his thick, dark whisker marks and a mouth that was pulled into a vicious snarl exposing sharpened canines, the boy looked more like a vicious animal than a shinobi. The cloak did nothing to dissuade this either, as two long fox like ears of energy sprouted from his head while a bubbling tail swished rapidly back and forth behind him. This was the jinchuriki of the fearsome Kyūbi no Kitsune and right now, he certainly looked the part.

As these two faced down each other, they thought on the path they had taken to get to this point. Of becoming shinobi of their village, Konohagakure. Of the Land of Waves and the invasion which led to the death of the Sandaime Hokage, Hiruzen Sarutobi. Of the offer of power, enough to end the life of Itachi Uchiha. Of the decision to leave and the decision to return. They thought about all this and more.

Naruto once more attempted to lift his left arm however it was clear at this point it was out of the fight for good. At this point, the arm was dead weight in the fight, a weakness to have to protect. Naruto grimaced at this; he certainly never took the easy options.

For his part, Sasuke began to form the hand seals for his most devastating close range move. As the chidori formed, the once brilliant blue lightning now a vile black and white mix, Naruto raised his right arm and formed his favoured close range move, the rasengan. The cloak, acting as a shell for the technique, dyed the normally blue and white sphere a vibrant purple.

As their muscles tensed, Naruto could only question why it had turned out like this. Sasuke was- no, is his friend. He is his brother in all but blood. So why was he going to a madman who he knew only desired to use and then discard him? It made no sense to the blonde, even with his mind tainted by the rage of the beast sealed inside of him.

A sudden shift in Sasuke's posture was all the warning Naruto received before the final attack began. As Sasuke blurred forwards dragging his lightning covered hand behind him, so too did Naruto, the oddly coloured rasengan hefted at his side.

Before the two reached each other, they leapt and time seemed to slow as they got closer to each other. Techniques at the ready, they tensed their airborne bodies for one final clash.

"CHIDORI"

"RASENGAN"

As the attacks collided, the energies rippled and pulsed as the two fighters sought to finally end their bout. A sphere of black energy formed over the two as air was forced away from the sphere, the lake below thrashing with waves.

Suddenly, the energy that pulsed outwards was pulled in, the sphere growing smaller and smaller until it finally vanished, leaving no trace of the two shinobi.

This was the scene one Kakashi Hatake appeared to. An empty valley, signs of a brutal fight and no trace of the two boys he had been after.

Meanwhile, in another place, two more beings clash with their full fury. In an endless sea of colours do these two collide, their power sending out terrifying ripples that crashed against the very walls of reality itself.

One was a dragon. A colossal one topping out at around 100 metres long, with red scales and a single large horn, this is the Great Red, the True Dragon. Beams of energy lanced towards him but, with a kind of grace that one would not expect, he swam around the vast majority, with only a mere few colliding. However, even those few beams caused devastating explosions to form. Despite the might of the attack though, the massive dragon merely ploughed through the smoke, roaring fiercely as he charged at his opponent.

His opponent meanwhile was slightly harder to classify if one did not know of her. Unthreatening and with an extremely fluid form composed of a strange energy, the other being continued to launch beams of energy before being forced to shift her form out of the way to avoid the large beasts charge. This was Ophis, the Infinite Dragon God, currently focused on fighting the perceived intruder to her home. As the dragon rushed past her, Ophis launched a wave of energy, striking the side of her foe. Despite the sheer amount of power Ophis used though, she achieved nothing more than a mild scorch mark.

This was not going to plan. That was Ophis' thought at this time. She had originally thought that she could battle the Great Red with her powers augmented with the energy drawn from other worlds to finally defeat him. It had been a long shot, she would admit that much, but she had wanted to try one last time to force the intruder from her home. After all, if this failed she would just have to go with plan B and bring up her Khaos Brigade to make up the difference in power.

For the Great Red's part, he was just wondering when she would flee, as she always did. Honestly, couldn't she just leave him alone? She could just let him fly around so long as she didn't stare. As it was though she was incredibly annoying and, though he didn't show it, her attacks hurt damnit!

As the two squared up for another clash, Ophis felt a wave of energy suddenly pulse from a distant world. If her current form would have allowed it, she might have grinned. It was certainly not an insignificant amount of power and even if she failed there might be some benefit to this little experiment. Focusing in on the source, she mentally frowned at the small barrier set up around that world. It wasn't insurmountable, nothing could stand against her after all (bar one being that shall be ignored), it was enough to distract her.

Sensing her distraction, the Great Red struck, releasing a thick wave of energy that threw off her concentration, causing her to misjudge the amount of power she needed. As a result, instead of siphoning off the power gently through the cracks, she instead yanked the power source through in surprise making a small hole in the barrier.

From the hole came something neither she nor the Great Red expected. Two boys, one clad in a rather hideous orange and blue tracksuit, the other appearing more demon than human were launched through. Ophis, thinking quickly tried to grab for the power she had sensed one of them had. However, much to her surprise, the power fought back. It lashed and snarled at her in an attempt to deny her will. She couldn't have that now could she?

As she once again pulled at the power, she noticed the demon looking boy slip through one of the cracks made from the fight. She would probably have to do something about those later. As soon as she felt the power begin to give, she put a little more force into her attempts and pulled away a little over two thirds, causing the remaining boys red energy field to flicker and pulse before he too slipped through a crack.

Again mentally frowning, Ophis regretted not getting the rest of the energy from the boy. However, she soon noticed that something, or rather someone, had gotten over the initial surprise of her actions and was already moving to attack her. Setting aside the matter of the two boys and the energy which seemed to be rather docile now, she prepared to once again clash with her foe.

For the Great Red's part, he merely thought how interesting it was that the two boys had not been erased immediately on their passage through the void. After all, it took quite some magical protection to survive in the Dimensional Gap. Oh well, it wasn't his problem. He still had a pest to chase off.

Rias Gremory was a rather pretty young thirteen year old. With her fair skin, blue-green eyes and waist length, crimson red hair with loose bangs that framed her pretty face, she cut quite a nice image. Coupled with the fact that she was already developing quite sizeable assets, it was clear she would be a knock out beauty in a few years.

She was also a devil.

More specifically, she was a devil of one of the 34 remaining pillar families, the noble Gremory clan and the younger sister of the Crimson Satan, one of the four great Satans who govern the Underworld, Sirzechs Lucifer. As such, she had high expectations set for her as she was the heiress as well as being merely a high class devil. As such, she was taking a small vacation from her family and the endless tasks she had to deal with working day to day. She loved her family, she really did, but sometimes she just wanted to get away from it all and relax with no one to bother her.

It was why she had come out to this clearing after all. It was rather bland all things considered. Bordered by a small wood and filled with long grass and only a single tree in the centre for shade, it was utterly unremarkable. Hence the reason she came here. No one would really look for her in such an ordinary place as her families land had far more relaxing features to visit.

Of course, she wouldn't be able to remain here long. When her brother realised she wasn't in her usual spots he would probably have a panic attack wondering where his sweet "Ria-tan" had disappeared off to and send out the servants and his peerage to find her as well as call in favours from the other great Satans – again.

Still, she would enjoy the peace while it lasted.

As she lay there, her thoughts wandered. After forcing aside a certain unpleasant bird that seemed to pop up more and more, they focused on that of her steadily growing peerage. Currently, she only had three members bar herself. The first was her best friend Akeno Himejima. Akeno had been a young girl she had saved from being killed by her family, a thought that caused her mouth to crinkle in distaste, and reincarnated as her queen. She had grown very close to the black haired girl and enjoyed spending time with her and although her developing sadist side was a little off putting, she couldn't bring herself to care.

The second addition to her peerage was the young rook, Koneko Toujo. Koneko had been scheduled for execution on the crimes of her sister as well as racial hate for her being a youkai, more specifically a Nekoshou, a type of cat youkai. The little white haired girl was unfortunately traumatised from the ordeal and had closed off her emotions to everyone. It had taken a long time to get her comfortable to show even the miniscule amounts of emotion she currently showed to the family.

Her final addition was a recent one. A young blonde boy she had found nearly dead on the frozen ground in Northern Europe and had reincarnated as her knight. He was currently a little standoffish – okay, very standoffish – at the moment and had refused to tell them more than the bare basics of the so called "Holy Sword Project." Rias had, like most of her family, been disgusted by the actions of the church, though she suspected Sirzechs already knew some of it anyway. Like Koneko, she had to give the boy a name as he did not have one, unless you counted a serial number anyway. As such, she had dubbed him Kiba Yuuto. He had scoffed. Right now he was training with her brother's peerage, more specifically the Knight Souji Okita who has a much better relationship with the boy. She could only hope he would continue to open up more.

As she continued to think on this, her thoughts turned to what she would use her last pieces on. She currently had a rook, a knight, eight pawns, a bishop and a rare mutated bishop piece left to use. She was unsure on what she wanted to do with the remaining pieces. She wanted to use them, obviously, and give herself a large group of friends like her brother Sirzechs had, but she was unsure which method to use.

As it stood at the moment, she could either continue with her current "wait and see" method to gaining a peerage or actively seek out more members. The first method she felt was far more personal and much better for building up a strong familial bond with her peerage. On the other hand, actively seeking members would fill her peerage more quickly and she would be able to ensure their abilities beforehand and as such, they would be more helpful. This didn't prevent her from building the bonds she wanted, but it simply felt too business-like to appeal to her. Then again, maybe she could-

Her internal monologue was cut off rather suddenly when she sensed a pulse of energy coming from almost directly above her. Looking up, she saw what looked like an orange comet speeding towards the ground before a loud thump indicated contact with the ground just on the edge of the clearing.

Naruto was rather hesitant to open his eyes again. Last time he had tried he had got a glimpse of a whole lot of colours, a huge dragon and a weird energy thing that had hurt to look at. He was also somewhat concerned. The Kyūbi, which had been giving him a running commentary off how pathetic he was, had cried out before suddenly going silent. It was mildly worrying, not that Naruto particularly cared for the bastard fox, it got what it deserved if it got hurt. More, he was worried that whatever caused that reaction would be coming for him next. Still, he was confident he would figure something out; he always did when things were looking down. He did have to admit though, a few too many of his plans went along the lines of "charge at thing, punch thing till thing stops moving" with anything else really being made up as he went along. Oh well.

After what felt like hours of being buffeted around by a weird "not wind" wind, during which time he had a small feeling of discomfort come from his stomach, he felt wind, actual wind begin to hit his skin. Opening his eyes, he nearly whooped in joy. The colours were gone! He could see trees, he could see the sky and the clouds and the ground. The ground in particular seemed pleased to see him too, as it was rushing at him very fast.

Naruto had a few seconds to process this before a flat "WHUMPF" sounded throughout the area.

Author's Note: It's happening! I am actually not procrastinating on my first fic too much (touch wood). At 2,800 words not including the AN or anything else, I now have a huge appreciation for people like Third Fang who can pull off those monster chapters of theirs. I also pray to god that I managed to get the paragraphs right.

Well, as you can see, I am trying to write a Naruto/High School DxD crossover. A little odd for someone who has an inherent dislike for harems and I am not entirely sure I should be trying a crossover for my first attempt at writing fanfic, but it is the most developed fic I have at the moment. I chose a VoTE Naruto for the simple fact he has a lot of potential for character development. I also don't have to worry too much about him being out of line power wise and can instead increase his abilities at a sensible rate. The pairing is currently leaning mostly towards Rias but I am still quite undecided. If I do end up making this a harem, and that's a big IF, it will be at most three girls and Asia will not be a part of this. Neither will Ophis or Grayfia actually.

I do have a couple plans for the future too that I think are a little original. I hope they pan out well. There are three that I have specifically set up this chapter. Two are somewhat obvious, or at least parts are but the third I like to think is more subtle. I did have a scene that made the third more obvious, but I cut it out because I want to leave it a surprise.

On the peerage, Rias is only missing Gasper from canon and I do not really much of a timeline for joining so I hope I got this right. Right now, Kiba still hasn't accepted anyone other than Souji so he will be a little different from canon start Kiba. The next chapter should hopefully feature more of the characters themselves rather than just events.

I am not entirely satisfied with the small part between Ophis and the Great Red but I needed it to set up future events. I don't like it when I flashback shows what should be a major plot point just before said plot point comes up or even after it has passed. That just smacks of retconning and I will do my best to avoid that. I also know Ophis is technically genderless, but I was getting more and more upset having to constantly write "it" and rearrange sentence structure to make things work before I gave up and just called her a "she."

I will try to update regularly although I make no promises as it depends on how life feels like treating me and whether I start my other story ideas. If you do check out my ideas, be sure to pm me if you feel like writing them as bar this fic and another one, I wouldn't mind turning them into challenges.

Anyway, I'm signing off now. Please review and give me lots and lots of criticism! Flames will be burnt.

Miskwisk away!