Title: Bureau Agent Potter
Author: NHunter aka N.H. aka 夜狩猟家 aka 灰色天使
Genre: General, Adventure, some hints of Romance later on
Rating: M = NC-17
Warnings: AU; Crossover; Some violence; Possible lemons later on; Crazy author...

Disclaimer: I DO NOT own "Harry Potter" or "Mahou Shojou Lyrical Nanoha". No profit is being made. Same goes for other books, anime & manga I may or may not use for ideas.

"speaking"
"telepathy"
'thinking'
"spells / devices speaking"
written messages

AN: I will be adjusting the ranks of some TSAB characters within this story to make the relation between the rank and the function within the Bureau closer to what we're are used to. Thus, some characters might get demoted by a rank or two. That, however, should not have much impact on the Nanoha-verse plots, when I get there.

Also, given that I start around a year and a half before A's time, it will be a few chapters before canon characters of Nanoha will start showing up. Bear with me here...

Special thanks to Lupine Horror for his invaluable help in getting this story rolling.

Bureau Agent Potter
chapter I: The once lost gem

Harry sighed. Ever since Ron's unfortunate attempt to give him a call a few days ago, his summer went from tolerably-bad to awful. Uncle Vernon had been raging over being disturbed by freaks for an hour that day, and the green-eyed almost-teen wizard ended up with a few new bruises thanks to that. At least Hedwig had avoided the walrus-man's wrath by virtue of not being there when it had happened...

After that day, the Dursleys decided that they wanted him out of their sight – and their house – for as much as possible. Thus, as soon as he was done with the daily portion of his chores, Harry was kicked out of the house. And he could do anything he wanted in the neighborhood for as long as he was back in time to cook them a dinner. This would have been almost like dreams come true for the dark-haired wizard if not for the fact that his cousin Dudley and his gang decided that their old game of 'Harry hunting' was still very much fun to play. In other words, as soon as the green-eyed Potter found himself on the streets of Little Whinging, he needed to hide or run for his life if he didn't want to end up as a punching bag for those four.

Unfortunately, it looked like lady Luck wasn't on his side today... The gang had found him when he was passing through the small local park and now they were trying to corner him in some blind alley and beat him up. And, no matter how much trouble Harry had believing it, those four had somehow managed to gain a few IQ points since the primary school. Now they were using something that could actually count as pack-hunt tactics.

And even though the green-eyed Potter himself was a little bit faster than his pursuers, today he found himself unable to lose them no matter what he tried. Even worse, the Dudley's gang was slowly cutting off possible routes to the more populated parts of the neighborhood he could follow. In the end, the dark-haired wizard found himself chased into a construction site on the edge of Little Whinging. And with no workers around – it was Saturday – there was no one who could prevent his cousin and the grunts that followed him around from being as violent with him as they wanted to.

Of course, Harry wasn't about to give up and accept the beating easily, but... Before long, a rock Piers threw managed to connect with the back of his head, sending him into the a hill of excavated dirt. And as the young Potter fell, his baggy T-shirt brushed a layer of dust off a small greenish gem than somehow ended in the said hill. Not that anyone noticed this. Yet.

Still believing that he might be able to escape from his pursuers, the green-eyed not-yet-teen tried to push himself back onto his feet. His was unsuccessful, though, as Dudley stepped onto his back, instantly pinning him back to the ground with his weight.

"We win, freak,.." The youngest Dursley spoke. "And, now, we will beat you up good!" With those words he pushed the dark-haired wizard-boy further into the dirt. And in doing so he also made the yet-to-be-noticed by anyone gem come in contact with the bare skin on the young wizard's chest.

Harry had but a briefest of the moments to wonder what was pushing against his skin before his world exploded in pain, as if someone had suddenly stuck a white-hot rod of barbed iron right through him. For Merlin knows how long the young Potter screamed and screamed his lungs out as scorching pain kept flooding his senses. Then, as another epicenter of pain exploded in his forehead, the blissful void of unconsciousness finally claimed him...

As his mind was elsewhere, thanks to being tortured by something, Harry was completely unaware of the light-show that surrounded him. A moment after the gem came in contact with his skin, there was an explosion of bluish energy that threw Dudley and the rest of his friends away from him as if they weighted nothing. And as this 'explosion' was followed by unnaturally-colored lightnings striking in random directions from Harry's body, the gang decided to do a sensible thing and took flight.

The light-show, though, absolutely didn't care about them being there or not: more and more lightnings kept popping up while the freakish bluish aura surrounded the not-yet-teen wizard's body. Then, after maybe half a minute, the lightnings started turning darker as black smoke began seeping out of the scar on the young Potter's forehead.

As more and more of this unnatural smoke was forced out of the scar, it took a shape of something that looked roughly like a human head and tried to force its way back into the young wizard's body. But another explosion of bluish energy that happened then blew the miasmic entity away, where it lost all of its connections with its previous host and quickly disappeared in a horrible and inhuman soul-wrenching scream.

Even with the malicious spirit exorcised from the young Potter's body, the light-show surrounding his body didn't cease immediately. The bluish aura was still surrounding him and discharging lightnings in random directions every now and then. Though, by now, those began visibly losing their power, as if it was running out of juice. And, indeed, just a few minutes later the unnatural activity surrounding the unconscious wizard-boy stopped...

~/ *** \~

The universe was an interesting place, there was no denying it. At its core there was the so-called Dimensional Space, around which layers of reality were wrapped a lot like onion peels, with each such layer containing myriads of worlds that could support intelligent life. And since these layers appeared to be independent of each other, the chances were, two separate world could exist in what would otherwise be the same point in space.

Even more curious was the fact, first noted by a famous archeologist from Scrya clan, that such overlapping worlds tended to share many similarities. Geography, climate, species which lived on them, even history and culture could be very similar. Non-administered worlds 97 and 138 were a pair of such almost identical overlapping worlds: the only noticeable difference between them was the technological advancement with the former being roughly two decades ahead.

The Time-Space Administration Bureau, of course, was keeping an eye on both these worlds. Actually, performing a routine scans of non-administered world 138 was the last task the investigative spaceship "Leto" of TSAB had to complete before this round of patrolling the space was over and it could head back to its base.

And since the locals were neither space-faring, nor were they using any magitek, the main purposes of these scans were confirming the state of their advancement and locating any Relics or Lost Logia that might have been smuggled there by less than law-abiding elements.

At first, it looked like the scan won't show anything that wasn't seen in the twenty years this world had been under the observation. But then, suddenly, the ship's sensors picked up a powerful magical signature that signature quite very similar to the ones created by the Lost Logia when they released the discharges of their power.

"Warrant officer Aoba, report the situation!" The captain of the spaceship ordered as soon as the information about the detection of Lost Logia made it to the main screens.

"Aye, captain!" The said warrant officer replied. "It appears that we've detected a class four neutrally-aligned Lost Logia. Unfortunately, it is located on the side of the planet we can't see from here, so the readings aren't as accurate and I can't give you its precise location." A new image appeared on the main screen, showing a circle of hundred miles in radius overlaying the southern-most part of what the locals called the island of Great Britain.

"And what is its status?" The captain of investigative spaceship "Leto" asked then.

"The activation of presumed Lost Logia happened at 19:34 by inboard time." Warrant officer Aoba replied. "Currently its reading are decreasing. If the trend continues, we will lose its signal completely in two minutes." And, much like it was predicted, a little more than two minutes later the sensors of "Leto" could no longer pick up any traces of activity coming from the Lost Logia. Not sure what to do in this situation, the captain decided that he could consult his superiors for the best course of action.

The consultations were quite long, but in the end it was agreed that investigative spaceship "Leto" was to stay on the non-administered world 138's orbit until it located and collected the Lost Logia they had detected. The crew, of course, would be paid the overtime for their troubles.

~/ *** \~

Harry slowly drifted back to consciousness. His chest still hurt, though now it was a manageable pain, and he had a head-splitting headache along with something like a magical tar covering half of the right side of his face. There also was a bump on the back of his head where the rock Piers had thrown hit him, and his back was aching thanks to the stomp performed by Dudley... All in all, Harry felt like shit and the facts that he was both late for cooking Dursleys the dinner and that his entire front was covered in dirt weren't helping him any. But since he had no other option but to return back to Number Four and face whatever shitstorm the today's events ended up conjuring...

Indeed, the Dursleys – especially aunt Petunia – were far from happy with him. They ranted for well over an hour how he was an insolent, ungrateful little freeloader who was sucking money out of good hardworking people and gave nothing back. Eventually, though, the Dursley ran out of stuff to chastise his for and let him return to his room. Without dinner tonight and any meals tomorrow, of course. And with a strict warning not to dirty anything in their house if he didn't want to spend the next week without a crumb of bread to eat as well.

And while the threat of being left without food wasn't bothering him too much – he had quite a loot of edible things stashed in his room, after all – Harry decided that he indeed should drop by into the bathroom to finally wash the dirt off himself and change into clean(er) clothes. That, and he wanted to inspect what the hell had happened to his chest properly...

While he had already seen some of it, looking that much downwards was troublesome and, well, didn't provide him with the proper image. Still, the young Potter already knew that he now had a greenish diamond-shaped gem two thumb nails in width and double that in height stuck in his chest somewhere on the level of second or third ribs. But now, standing in front of a proper mirror, he could see that the gem was not just stuck in his chest – it looked more like it had partially merged into him as well. Merged as in it had taken roots into his body! And judging by the fact that the skin around this gem-thing was angry-red and partially even charred, such a merge wasn't exactly a natural thing...

But since it did look like he could do anything about this, Harry decided that he should worry about it only if the damn thing would cause him problems. He will ask madam Pomfrey about it when he got back to Hogwarts... Speaking of which, he still needed to finish his summer homework...

~/ *** \~

It was a couple of days since that incident, and aside from nagging pain in his chest that was still there, the newest addition to his body wasn't bothering Harry all that much. Especially since there were much more troublesome things he needed to deal with. Namely, aunt Marge and her loathsome bulldog Ripper were coming, and they were going to be staying at Number Four for the whole damn week!

Saying that Harry and his not-really-aunt Marge not got along was like saying that inferno was a little hot. And as much as the young Potter would have like to stay out of the woman's way for the whole duration of her visit, it was impossible. After all, he was the one who was going to be doing the majority of cooking. As well as all of the cleaning and many other chores... And, even worse, since she had absolutely no idea that he was a wizard attending Hogwarts, uncle Vernon had told his sister that he attended 'St. Brutus's Secure Center for Incurably Criminal Boys', and forced the green-eyed now-teen into supporting that story as well.

Needless to say that despite Harry's best attempts to stay out of the woman's way and be as invisible as he could without his cloak, it only took a few hours since her arrival to Number Four before an inevitable happened. Aunt Marge began openly insulting his parents – with both Vernon and even Petunia agreeing with her – and the young Potter's already strained thanks to the aches he still had in his chest patience ran out. A shouting match of epic proportions ensued.

In the end, Vernon ended up beating his dark-haired nephew into a bloody mess to shut him up, and threw him and all of his things he could find out of the house. Probably hoping that the escaped criminal, Sirius Black, would find and kill him before Albus Dumbledore could use his freakishness to bring Harry back into their lives.

Once the green-eyed boy-wizard had somewhat recovered, he dragged himself as far away from the Number Four as he could, running out of strength about four blocks away, in Magnolia Crescent. And as he rested against a low wall, he tried to think about what he should do next.

He was neck deep in the problem, after all. Not only he was left without a roof over his head when a highly-dangerous criminal was at large, but he also was seemingly without any means of getting to Charing Cross Road in London, where the entrance into the Diagon Alley was located. After all, it was not like some cab driver would accept magical gold as a payment for his service. And even if he did, Harry was sure that the Ministry for Magic would see that as a deliberate breach in the Statue of Secrecy and punish him severely for it. And he would be breaching the very same Statue of Secrecy if he tried to fly his broomstick...

Trying to think of something, the young Potter tried to remember, whether there was any magical equivalent of taxi. But, alas, he couldn't recall anything about it. In the end, not wishing to spend a night alfresco, Harry decided that maybe he should actually break the magical world's law and fly his broom to London. Hopefully, they will forgive him for not wanting to become the next victim of a serial killer that had escaped from a prison.

Alas, even if he could fly his broom, it looked like he would have to abandon his other things: they were just too big and cumbersome for taking them along to be feasible. And Harry didn't want to make his situation even worse by using magic in the open... But it looked like he had no other option. So with a heavy sigh the green-eyed teen reached for his wand. Standing up, he raised his wand, pointing it at his trunk and... There was a loud bang as a strange triple-decker bus painted in purple appeared out of thing air and almost ran him over. The bus's door opened and a conductor in a purple uniform leaped out of it as he began to speak loudly to the night.

"Welcome to the Knight Bus, emergency transport for the stranded witch or wizard. Just stick out your wand hand, step on board and we can take you anywhere you want to go. My name is Stan Shunpike, and I will be your conductor this eve-..." The conductor continued his speech as Harry stared at the bus somewhat dumbly, not really believing that he now could ride to London.

"C-Can you really go anywhere?" The young Potter asked carefully.

"Yep!" The conductor whose-name-was-Stan confirmed. "Anywhere as long as it is on this island." Well, it looked like Luck wasn't totally against him today, Harry though.

"How much would it be to get to London?" He asked then.

"Eleven Sickles." Said Stan. "But for fourteen you get 'ot chocolate, and for fifteen you get an 'ot water bottle an' a toofbrush in the color of your choice!" Quickly pulling a bag of coins out of his trunk, Harry got eleven silver coins out of it and handed them to the conductor. Then he dragged all of his belongings inboard and took a seat on the nearest empty ...bed? Yes, for whatever reason, there were no seats on this bus; instead, half a dozen brass bedsteads stood beside the curtained windows. "Take 'er away, Ern," Said Stan, sitting down in the armchair next to bus's driver.

There was another tremendous BANG, and the next moment Harry found himself flat on his bed, thrown backward by the speed of the Knight Bus. Pulling himself up, Harry stared out of the window and saw that they were now bowling along a completely different street.

There were three stops in not even remotely-close locations all over the England, before the purple monster of a magical bus finally arrived to London. And as soon as the it stopped, the young Potter did his best to vacate it, lest he had to suffer through another roller-coaster of a ride on it – the man behind the wheel apparently had absolutely no idea what the traffic regulations were.

Having watched the triple-decker bus disappear into the night with yet another loud BANG, Harry picked his things up and headed into the 'Leaky Caldron' pub, hoping that there will be a room for him to rent there. But as soon as he stepped into the pub that thought was forgotten as he almost ran into a portly little man in a long pinstriped cloak, who was accompanied by a couple of aurors. Due to how surprised by this Harry was, it took him a couple of seconds to recognize that man as Cornelius Fudge, the current Minister for Magic.

~/ *** \~

It has been ten days since the investigative spaceship "Leto" was ordered to remain on the orbit of the non-administered world 138 and search for the Lost Logia they had detected there. Alas, the artifact was completely silent ever since then, to the point where some thought that it wasn't even on the planet anymore, despite the fact that it couldn't have left it without them noticing it.

And since the Lost Logia wasn't showing any activity ever since that brief surge of magical power ten days ago, they had to manually search for it by deploying the mages onto the planet's surface. Alas, the only thing they managed to discover was the site where that initial energy emission had happened. Which was not helping them much if any.

But since they had their order to find it, there weren't returning home until the Lost Logia was safely secure inboard of their spaceship. The crew just had to hope that something that would give them a hint where the artifact was would happen soon...