A/N: Teehee, it's a HP/Naruto crossover…I love those…And so, I decided to write one of my own. Of course, there are probably many fantastic HP/Naruto crossovers…however, I've read a lot of them and noticed that a lot of them use the same or similar combination of characters. Also, a lot of them follow the Harry Potter books' storylines. I'm not entirely sure of what I should do, but I don't think I want to type the book all over again with just a few changes for my added characters. So…we'll see. :p

Legend:

-Blah or "Blah" normal

-'Blah' thoughts

-Blah Flashback

- "Blah" English (this will be changed in the next chapter)

Disclaimer: Oh, the things I'd do if I owned Naruto…But unfortunately, I don't. I don't own Harry Potter either. Naruto belongs to Masashi Kishimoto, and Harry Potter belongs to J.K. Rowling. Enough said. Enjoy!

Prologue: A New Mission?

Tsunade, the fifth Hokage, held a cup of tea in one hand as she flipped through papers with the other hand. She sighed, a frown creasing her forehead.

"What to do…" she muttered, looking down at a folder and a single sheet of paper on her desk. The folder was labeled with a simple picture of an eye and the head of a hawk.

'I guess I have no choice…' Tsunade thought, sighing once again. 'But I'm not sure if they're going to like it…' She pulled out three sheets of paper from the folder, and put them on top of the sheet that was on the desk. She looked up.

"Shizune!" she called. A short-haired lady walked into the room.

"Yes, Tsunade-sama?" Shizune asked, looking puzzled by the slightly agitated expression on Tsunade's face.

"Bring these people here…"

Tenten yawned loudly as she stretched while sitting on a thick tree branch. She had returned from a mission last night, but her muscles still ached. She held her Anbu mask, subconsciously rubbing the smooth surface with her thumb. Since she had just came back from a 3-day long mission, she didn't expect any work for her to do until tomorrow, or the day after, if she was lucky. Today, she was going to rest, get some sleep, eat some good food, and sharpen her weapons. She sighed happily as she began to think about her warm bed, dango, ramen, rice cakes, sharpened steel…

"Tenten…" said a voice from below. She pretended not to notice. She knew who that voice belonged to, but no way in hell was she going to let HIM ruin her happy moment.

"Tenten," the voice repeated, slightly louder than before. There was an edge to the voice as well. Obviously, this person disliked having to repeat himself. A smirk slowly creeping onto her face, Tenten continued fantasizing, humming a tune to herself. There was a pause. The person below hadn't moved, but she knew he was glaring at her.

"Tenten, get down here now. The Hokage wants to see us." Tenten twitched slightly. The Hokage wanted to see them? Why? Sighing, she placed her Anbu mask on her face and jumped down. She grinned nervously when she saw the person there, wearing an Anbu mask, with his arms crossed and seemingly annoyed. She resisted the urge to giggle, and imitated his posture.

"Oh come on, Neji…I was just having a bit of fun." She said, pretending to be sorry. Neji turned his head curtly in response.

"Let's go." he said, and the two disappeared in a puff of smoke.

0000000000

When the two Anbu's appeared inside the Hokage's room, they were surprised to see two more people standing in front of Tsunade's desk, clad in Anbu clothing as well.

"Sasuke, Naruto!" Tenten exclaimed, and the two turned towards them. The blond-haired one greeted them enthusiastically.

"Hi Tenten! Hi Neji!" He shouted. "Are you here for the mission too?"

"Mission?" Tenten blinked. "But I-"

Just then, the doors opened and Tsunade walked into the room.

"Oi, baa-chan! What did you call me here for, huh?! I was just about to eat ramen-" But he was cut off by Tsunade, who looked quite serious.

"Listen up, because we don't have a lot of time left. And Naruto…don't call me baa-chan!" She snapped, and Naruto grinned in response. Muttering to herself, she turned towards Tenten. "Tenten, I know you just came back from a mission…I'm sorry, but we need you for this mission."

"That's fine with me," Tenten said quickly. "So, Tsunade-sama…What is this mission? And what about these guys?" She asked, gesturing towards the three men. Tsunade nodded.

"I was just about to explain that. You, Hyuga Neji, Uchiha Sasuke, and Uzumaki Naruto will be sent to a…special mission." She replied.

"Special mission?" Neji asked. All four of them were staring at Tsunade curiously.

"Yes…and you'll probably be coming back in a year or so." Tsunade answered, looking grave.

"A…A YEAR?" Naruto exclaimed.

"What kind of mission is it?" Tenten asked, surprised.

"Well, it's a long story…but I'd say it's an A-rank or possibly an S-rank mission. There is a chance of death, too. Let's see…how should I say this…" Tsunade muttered, crossing her arms. Tenten, Neji, Sasuke, and Naruto waited expectantly, urging her to go on. Finally, Tsunade spoke. "You four are being sent on a year-long mission…to England. To be more precise, Hogwarts school of Witchcraft and Wizardry. You will be expected to protect the school from their enemies and most importantly, protect a certain boy. You'll also be undercover as exchange students from Japan, participate in everything the school does, and more." Tsunade paused, letting the jumble of information sink in to the young Anbu members' heads. Said Anbu's were currently speechless, staring at Tsunade as if she had grown a second head.

"WHAT??!!" As expected, Naruto was the first one to break the silence.

"E…England?" Tenten managed to stutter, as she tried to process the information in her head.

"Hogwarts…witchcraft? Wizardry? Hokage-sama, I would like a proper explanation." Neji demanded, making an effort to hide his shock but failing.

"I agree." Sasuke said, obviously finding it difficult to understand this so-called 'mission'. Tsunade sighed.

'I knew they would react like this…' she thought wearily. She cleared her throat.

"Calm down…I'll explain everything. Where should I begin?" Tsunade looked at the four confused Anbu's.

"How about our destination? Hogwarts, was it?" Tenten suggested, and the rest of the team nodded in agreement.

"Alright. Simply put, Hogwarts is a school of witchcraft and wizardry…Basically, it's where students learn how to use magic. From what I've heard, students normally enter at the age of 10 or 11 and they leave in their 7th year." Tsunade answered, but this just seemed to make them more confused.

"MAGIC? You mean like, in those fairytales where they wave little wands and make flowers appear from a hat?" Naruto asked with his eyes wide at the ridiculous thought.

"Not really, those are magic tricks…True, the wizards and witches at Hogwarts use wands, but I heard they do far more complicated spells than conjuring flowers…"

"Wow, cool!" Naruto exclaimed excitedly. Tenten sweat-dropped at his quick acceptance of this strange mission. Finally, Neji spoke up.

"So you want us to go undercover as these…students?" He asked. Tsunade nodded.

"That's right. Everything you need will be taken care of, so don't worry." She replied.

"Just curious, Tsunade-sama…but why us? This mission seems awfully long and like you said, challenging, for just the four of us…" Tenten questioned. Tsunade sighed.

"You're right. Though you four are skilled Anbu's, I would have liked to choose at least 6 or 7…I'm afraid that most of your fellow teammates are away on long-distance missions, however. Last week I sent about 8 people to the Wind Country, not knowing that a year-long mission to England would be coming up. I regret it. But, I trust you four to do your best and complete the mission successfully." She explained. The four nodded in response. Tsunade paused for a moment, deep in thought. She then perked up, as if she had realized something.

"Oh yes…I forgot one more thing. Your assigned task, of course, is to protect a certain boy from harm…but there is one other job you must do." She added. Before she could tell them about their other task, there was a crackling noise at the back of the room. Everyone stared as an elderly man with a long silver beard, spectacles on top of a crooked nose, and wearing a ridiculous outfit of a long, purple robe covered with bright yellow moons and stars, and a matching pointed hat, stepped calmly out of the flaming fireplace…in which the flames had turned purple. Though Neji and Sasuke managed to keep their faces straight, and Tenten too with some difficulty, Naruto gaped, his eyes bulging, mouth hanging open, and struck speechless. Tsunade didn't seem very surprised by this odd appearance, however.

"Albus!" She said, sounding curious. "I thought you were going to wait at Hogwarts." The old man chuckled.

"Yes, indeed," He replied in surprisingly flawless Japanese. "But I decided to speak about their 'other task' myself." He turned his twinkling azure eyes to the four masked teens. "I see, so these four are being sent…My name is Albus Dumbledore, and I am the headmaster of Hogwarts School of witchcraft and wizardry." He greeted with a friendly smile.

"I'm Tenten, nice to meet you too." Tenten greeted back politely.

"…Hyuga Neji." Neji said quietly, not taking his eyes off the mysterious old man.

"Uchiha Sasuke." Sasuke said bluntly.

"I'm Uzumaki Naruto! Hey old man, can you really use magic? I wanna see!" He exclaimed. Tsunade cringed slightly at Naruto's rude attitude, but Dumbledore didn't seem to mind. Actually, he seemed quite amused.

"It's a pleasure to meet you, Mr. Uzumaki. Yes, I can use magic…And since you seem so eager, allow me to demonstrate…" He pulled out a thin wooden stick from his belt, and gave it a little wave. Everyone watched in astonishment as Tsunade's empty cup of tea floated up into the air, circled around Naruto's head, did a couple of flips and turns, and settled back down onto the desk.

"Wow, cool! Do something else, do something else!" Naruto exclaimed, until Tenten gave him a nudge in the ribs. Dumbledore chuckled at Naruto's reaction.

"Perhaps another day…I'm afraid we are running out of time." He said, immediately catching everyone's attention.

"So, what is this 'other mission' that we're supposed to do?" Sasuke spoke up, his eyes narrowing.

"Well, it's a rather long story, but I'll make it short and get straight to the point. I'm sure that you brave, powerful shinobi have a formidable opponent…? One that seeks even more power, more than anyone else?" Thoughts immediately went to Orochimaru, who was now gone but there were rumors about another shinobi, rising to power and threatening to take Orochimaru's place. Konoha's enemy villages, forces that threatened the village, and growing groups of missing-nins, were also growing problems. Dumbledore continued on.

"In the magical world, we too, have an enemy that is plotting to take over and wreak havoc amongst the innocent. His name is Lord Voldemort. Now, imagine the terror and power if our enemy and your enemy happened to…join forces. That would certainly be a disastrous result. But I'm afraid that it may happen sometime soon, if we don't do anything to prevent it…" There was a moment of silence as this piece of information settled in.

"L-Lord Voll-dee-mort?" Naruto muttered quietly to himself, and suppressed a snicker at the odd-sounding name.

"You want US to prevent this from happening?" Tenten asked after some thinking.

"Yes, but not in the way most would think. I do not expect you to engage these enemies in combat. I want you, shinobi of Konoha, to be a link…a link that will unite our two worlds, so that we can face these dangers together. And of course, there will be people from the magical world as links as well. Even if our enemies managed to destroy one of us, they would have a much harder time facing two forces working together." Dumbledore replied, and once again, there was a pause. Tsunade, obviously having heard all of this earlier, looked at the Anbu's expectantly.

"Hey old man…exactly how do we do this?" Naruto asked, for once sounding calm and composed.

"There is no specific way to bond our two worlds together…It is like asking, how do we make friends? And you probably know that making a friend requires far more than simply being nice to them. Tsunade trusts you to succeed, so I will trust you as well." The room was silent for a while as the four Anbu's contemplated about their assignment.

"You said there was a boy we're supposed to protect…" Tenten said slowly, breaking the silence. Dumbledore nodded.

"Ah yes, I almost forgot. He is quite an extraordinary boy…tends to get into trouble often, however. A little over 15 years ago, Lord Voldemort heard of a prophecy that a child was born and he would have the power to defeat him. Immediately, he sought to kill this child, before it could grow up and gain power. But his plan backfired, and even though he murdered the parents, he was not able to kill the baby." He explained.

"What made him fail?" Sasuke asked, momentarily being reminded of what had happened to him, over 10 years ago.

"The absolute reason is unknown, but when Voldemort shot a killing curse towards the baby, it was reflected and hit Voldemort instead. The baby survived with merely a lightning bolt-shaped scar on his forehead…and Voldemort himself vanished, but he was not dead. Everyone thought Lord Voldemort was gone for good…However, he tried many times to come back to life. He failed every time…it was because of the boy. But two years ago, Voldemort managed to revive himself completely, and stronger than before. We managed to hold him off from killing the boy last year, but this year…now that he has allies…I am not too confident. This is why I'd like to ask you to keep an eye on the boy…his name is Harry Potter." Dumbledore completed his last sentence with a slight bow. Realizing just how serious the task ahead was, the four Anbu's nodded firmly.

"Don't worry, old man! We'll keep this Harry Potter guy safe for sure! That Volldeewhatevermork dude won't be able to lay a finger on him while I'M there!" Naruto said confidently, punching his fist into the air.

"The name was Voldemort, idiot…" Sasuke muttered, and Naruto shot a glare at him in response. Dumbledore chuckled, his eyes twinkling amusedly.

"Yes, I have the utmost faith in you…I'm sure you will succeed. Now, concerning your trip to England…I'm truly sorry for such a short notice but…I'm afraid that you four will have to leave very early tomorrow morning, because it will be around noon in England." He said, much to the teens' surprise.

"WHA-AT? No way!" Naruto exclaimed, sagging wearily to the floor.

'There goes my good sleep…' Tenten thought dryly as she rolled her eyes at Naruto's reaction.

"Not up for the mission, dobe? That's fine…we'll do just fine without you. Actually, we'll do better without you." Sasuke taunted, smirking. Naruto straightened up immediately.

"Yeah right, Sasuke! YOU can stay behind and sleep with your blankie! No mission is complete without Uzumaki Naruto!" He yelled, ready to pounce. Sasuke glared at him. The two looked as if they were about to rip each others' heads off, until Tsunade stepped in. Meanwhile, Neji was frowning at them in annoyance while Tenten sighed, clearly exasperated.

"Alright, alright…quit it! There's no time to argue! You guys have to go home, pack everything you think you need for this trip…obviously, NO FOOD since there will be plenty once you get there-" She said, looking at Naruto who grinned sheepishly. "I highly recommend bringing your best shinobi tools and equipment – you will need them. Bring as many weapons as you like, but not TOO much-" She paused once more, looking towards Tenten this time, who grinned behind her mask. "-Or else your luggage will be too heavy to manage. Oh, and one more thing…your attire. Well, not that I know anything about fashion in England, but they probably don't have armored people wearing masks shaped like animal heads. Since you guys are going undercover and you can't afford to look suspicious, I advise you four to either leave your masks behind or put it with your luggage, and same goes for your usual shinobi outfits. You are expected to arrive here, in this room, by 4 o'clock in the morning wearing casual clothing. No later than that, because you will be leaving for England at 4 o'clock sharp. Got it?" Naruto, Tenten, Sasuke, and Neji nodded determinedly. Dumbledore, who had been watching Tsunade bark orders with amusement, spoke up.

"I will be seeing you tomorrow morning then." He said, smiling.

"Eh? You're not going back?" Naruto asked, surprised.

"Yes, I am, but not before showing you four how to get to England first. Also, I have something to give you before you leave." Dumbledore replied, and Naruto seemed to understand.

"Alright…Dismissed!" Tsunade said, and the four Anbu's disappeared, leaving behind small bursts of smoke.

0000000000

The next morning, Tenten, Neji, and Sasuke stood facing Dumbledore in front of the makeshift fireplace in Tsunade's room. It was approximately 10 minutes before 4:00.

"Where is Naruto?" Tenten, who had recently arrived, asked. She seemed slightly uncomfortable in her faded jeans, red and white striped tank top, and her hair in two long pigtails instead of buns.

"That dobe…he probably overslept." Sasuke muttered darkly. He was wearing baggy jeans and a baggy black t-shirt with an Uchiha symbol on the back.

"I expected as much." Neji muttered as well, clearly annoyed. He was wearing a beige collared shirt and a pair of jeans, with a black headband covering his Hyuga Branch mark on his forehead.

"We have very little time left…" Dumbledore said, sounding slightly concerned. Tsunade was drumming her fingers on her desk, mumbling agitated curses under her breath. Just then, the door burst open, and a slightly disheveled blond ninja ran into the room.

"Sorry I'm late, guys! Let's GO!" Naruto exclaimed excitedly, oblivious to the tension in the room. Everyone sweat-dropped.

"You're LATE! Has Kakashi been rubbing off on you?" Tsunade barked, her eye twitching in annoyance.

"Naruto, what were you doing?" Tenten asked with her eyebrow raised. Naruto rubbed the back of his head sheepishly. He was wearing baggy cargo shorts with a black t-shirt that had an orange swirl on the back.

"Uh…I was busy!" He said, a little too quickly. Sasuke smirked.

"You mean you were sleeping." He stated. Naruto scowled and crossed his arms, but much to everyone's relief he did not say anything back. Dumbledore cleared his throat.

"Now…" He said. "It is almost time to leave. Before you go, however, I would like to give you something…" He took out what looked like four black bands. "These have been specially charmed to automatically change your speech into our language – English. Once you wear these around your necks, it will activate. It will not be visible to others once it has been secured, however, because of the concealment charm that I put on them." The four teens stared at the bands with fascination before putting them around their necks. A strange sensation washed over them briefly.

"Umm…Hello everyone?" Naruto said nervously. Tenten, Neji, and Sasuke were surprised at the perfect pronunciation, and they could understand him perfectly as well.

"Interesting." Neji remarked. Sasuke fingered his band, which had become invisible around his neck.

"And now…it's time to go." Dumbledore announced, now speaking in English. Tsunade smiled at them.

"Well, good luck. I'll be sending someone once every month to record your progress, and so that I can determine whether to send more people." She said. Naruto grinned and gave her the thumbs-up sign, since he was unable to speak in Japanese at the moment.

"Stand in front of the fireplace…we will be traveling to England using the Floo network." Dumbledore said, taking out a small pouch from his belt. He pinched a small amount of powder from a bag and sprinkled it in the fire. To everyone except Dumbledore's surprise, the fire flashed to a vibrant purple colour. He chuckled at their reactions.

"Normally, the flames turn green, but this is quite a long-distance travel so the powder is stronger." He explained, his eyes twinkling in amusement. "Now, all you have to do is step into the flames and clearly say where you want to go. I want you to say Diagon Alley in London. I suppose England would work as well. So, who wants to go first?" He asked, looking around the room. Naruto stared at the flames, mesmerized. Tenten smiled nervously, and Neji and Sasuke were crossing their arms. Dumbledore chuckled once again.

"Alright, I will demonstrate, and you may go after me. Watch closely," Dumbledore stepped into the flames. The purple flames crackled, but they did not seem to burn him at all. "Diagon Alley in London." He said clearly, and with a pop, he vanished. Naruto was now gaping at where the old man had been just a second ago.

"So…" Tenten said, turning towards the three boys with a grin. "Who's going next?"

To Be Continued…

Yay, done. :) My first fanfic, first chapter, 9 pages on MS Word. Okay, I guess? Just so you know, they're all going into Harry's 6th year at Hogwarts so they're around 16 years old. I'm gonna stick them in the same Hogwarts year because it's easier for them to keep an eye on Harry, right? ;) I can somewhat predict what some reviews are going to say, I'll try to answer the big ones beforehand. :p

"Pairings???" I'm not entirely sure yet. Most likely no yaoi…sorry to those who like it. I have nothing against yaoi, but I can't write it…I already have an idea of ONE Harry Potter pair, but I dunno about the rest. All suggestions are welcome. :)

"Sooo many HP/Naruto crossovers these days!" Uh-huh, I'm aware of that. This prologue so far might seem similar to other prologues of HP/Naruto crossovers, but I've already got most of the storyline in mind, and I'll try my best not to disappoint you readers! So please try to be patient and supportive – once I get a few chapters finished, let me know if the storyline is too familiar, too boring, etc.

"UPDATE PLEASE!" Well, what can I say, it's summer! Unless I go on some big family vacation trip, I'll probably have some time to work on this every day. I tend to write long chapters, though…Depending on how long my chapters are, my updates will vary as well. I'll try going for "update once a week", but I might update sooner or later than that. 

Reviews! They'll make me happy, that's for sure! Except for flames…they make me sad and mad. Just think: how would YOU feel if you got a pointless flame for something you worked hard on? If you have constructive criticism that's fine, but please have a good reason for whatever you say. Thanks :)