Hey! Never thought I would upload this so soon. I was hoping to get most of it done before I decided to go and upload it, but being who I am I did it before I even got the third chapter finished.

I've been wanting to do a Yu-Gi-Oh/ Harry Potter crossover for quite some time. I've always been obsessed with reading them, but I haven't come across many I like. So, I decided to have some fun and write this.

It's going to start in the fifth book of Harry Potter, and the end of Battle City for Yu-Gi-Oh. It's definitely AU for both of them. I know I'm changing around Yu-Gi-Oh and stuff. This is basically about Ryou being invited to Hogwarts because I'm a Ryou nut (Bakura is still a spirit in the ring in this story)

I'll try and stay close to the fifth book but there are no guarantees. I haven't gotten far enough to know if I'm going to make major changes.

The last thing I'm going to mention is I'm a musical person. I play the violin, I used to play the piano ( now I only dink around on it ), and I'm trying to learn how to play the electric guitar. As you can already tell, the title of this story are two musical words. After writing a little one-shot called 'Sanity's Requiem', I found out what the word 'Requiem' meant and I decided to figure out what other musical pieces and notes meant. That is why all the chapters to come will have something to do with music.

'Aleatory' means a piece of music that involves the act of random choice throughout the piece or composition. 'Suite' means a set of instrumental compositions to be played in succession. Together it basically means a composition with many different parts that has acts of random effects throughout the piece.

Disclaimer: I don't own Yu-Gi-Oh! Or Harry Potter

Aleatory Suite

Chapter One: Accidental

The rain poured down upon the ground, water droplets bouncing across the Earth as it made its' last journey. Dark clouds hung low in the sky threatening the those below, soft rumbles reverberating throughout the land signaling that a storm was coming.

Cars whizzed by honking furiously at one another in their attempts to get home before the weather hit its worst. People bustled about with umbrellas, talking of an impending lightning storm. Another car zoomed by hitting a puddle, making the water splash up against a white haired teen. The boy yelled a curse at the car, shaking his fists in the air as if it would do some good.

The boy stopped in front of a shady looking shop. It was black, the paint smudged making the words almost unrecognizable. It hung precariously at a lopsided angle, as if it would fall at any second. However, the boy didn't seem to mind.

Without a second thought, he opened the door and headed inside.

An old man looked up from the bar and eyed him suspiciously as the boy sauntered over and sat down on one of the stools. His eyes never leaving the adolescent, he continued to wipe down the last glass shot. "We don't sell to minors."

The teen rolled his eyes, ignoring the scrutinizing look the bartender was giving him. "I'm old enough. I take it you don't get many customers."

The bartender hesitated, looking around at the empty bar before shrugging. "Business just isn't what it used to be." He leaned against the counter. "So what brings you here?"

"Relatives," the boy grumbled, turning the shot glass in his hand. He picked up the soft colored bottle of liquor before pouring the substance into the glass before him. "Damn people don't know when to leave me alone."

The man started. "Where did you get that glass? And liquor?"

The kid flashed a toothy grin. "Things just have a way of disappearing." He drank the shot in one gulp before slowly pouring another shot.

The door flung open, ruining the somewhat calm atmosphere. A man with long black robes strutted in towards the counter with purpose, the cloak concealing his features. He stopped at the counter just shy of bumping into it, reaching towards the bartender and grabbing his shirt. "I believe you've got something of mine," he hissed.

The bartender jerked, attempting to wrench free. "I have nothing for the likes of you," he spat. "Get out of my bar!"

The man wasn't fazed. Instead, he drew something out of his pocket and pushed it up against the bartender. "You will give it to me," he hissed into his victims' ear.

"No," was the shaky response.

"Fine," came the irritated reply. "If you won't give it to me, I will take it myself."

The boy, who had been quietly watching the interaction finally made a move. The cloaked man had not noticed the others' presence until the boy was upon him. Grabbing the mans' arm, the boy twisted it painfully behind his back until he was completely immobilized.

"Leave now before I break your arm," the boy growled menacing.

The man let out a muffled cry as he tried unsuccessfully to jerk away. Instead, his face met the wall with brutal force. "You'll pay for this!"

The boy snorted. "Sure I will. Now get out before I get mad. And that is something you don't want to see."

"Okay, okay!" The mans' head bobbed up and down in attempt to appease the angry teen. "Just please, let me go!" Once the pressure was released, the man skittered around the teen like a mouse waiting for the cat to strike.

Eyeballing the teen, he took several steps back, before deciding that the teen was only a physical threat. "You punk!" he sneered, drawing out a long stick and pointing it at the teen. "You should have taken me down when you ad the chance! Avada -!" He let out a shriek as the darkness clawed at his body.

Forgetting his current enemy, he pointed the stick at the shadows but they were faster than him. The stick disappeared within the darkness leaving him completely unarmed. His eyes searched frantically for any means of escape, but found none. Only darkness lived this world. Black upon black, swirling in a never ending see of the shadows.

Something grabbed his leg. He stumbled back managing to jerk his leg away from whatever had caught him. A hideous creature peered up at him with red eyes from the ground - or was it the ground? - long fangs salivating as it watched its' prey. With great pleasure, it wrapped its' clawed hands around his leg and started to slowly pull him down into the deep abyss.

Even as he screamed and kicked, he knew deep down there was no escape from this terrifying creature; this terrifying new world. He would be tormented forever in this realm of shadows.

~Accidental~

The bartender was staring at the boy, eyes wide with confusion and a hint of fear. The man who had seemed so threatening only moments before and vanished in an instant, swallowed by something, echoes of what might have been a scream reverberating throughout the room.

The teen on the other hand looked irked, eyebrow twitching in annoyance as he looked over the room as if he was looking for another fight. His chocolate eyes landed on the man. "What?" he asked gruffly.

"How-how did you do that?"

He rolled his eyes. "He didn't put up much of a fight now did he?"

"How did you do that?"

"Do what?" came the annoyed response.

"How did you do that without a wand?" the bartender demanded, coming to his senses. "The Ministry won't mind you using your magic out of school because of the situation, but...How did you do that without a wand?"

It was the boys' turn to look confused. "Are you senile or something? Who the hell uses wands? I'm not the fucking tooth fairy."

The bartender blinked, staring at him dumbly. "You don't use a wand? Boy, what is your name?"

"Ryou Bakura," the boy scowled. "What is this all about, fool?"

"My name is Tom and you, you need to come with me. I need to show you to someone."

Bakura cocked his head slightly as he watched Tom rush to a door he assumed went to the back. Should he trust him? No matter. He would just send the mortal to the shadow realm if it was a trick. He walked after the man, curious as to where he was leading him.

Tom rushed him into the back, hands hovering over Bakura's body as if he wanted to lead him through the back, but was unsure of the consequences of touching him would be. They reached a long hall of doors, voices echoing from behind, but they didn't stop. Once they reached the the last room, Tom stopped them. He knocked the door and opened it revealing a very disheveled looking man.

The man was sitting at a desk, documents and papers filling up every inch of space. At first it would appear that they were disorganized as they appeared to be haphazardly strewn across the room, but to the man, they were in perfect order, every piece of paper accounted for. His appearance was rugged, his posture sagging as if he was defeated. He ran his hands through his graying hair.

He didn't even acknowledge them until Tom stepped on some of the papers. "Tom! Get off of that!" He didn't even look up, instead choosing to wave his hands at him. "How many times have I told you I'm working on very important stuff!"

Tom carefully extracted his foot from the pieces of paper. "Fudge, there's something that needs to come to your attention. Can't you just take a few minutes off to hear what I have to say?"

"I have too much paper work to do," Fudge ranted. "Not to mention all the buzz about you-know-who coming back. It's all a bunch of rubbish but still there are those who people believe it's true!"

"Fudge!" Tom cried exasperatedly. "This boy used magic down stairs to fend off a Death Eater."

Bakura's eyebrow raised at the various names being thrown about. Death Eater? What kind of name is that? And just who the hell was you-know-who? Sounded like a band name to him.

"Oh?" Fudge said, stroking his chin, finally looking up to peer at Bakura. "Then I guess I'll have to set up another hearing. I suppose I can fit it in next week."

Tom shook his head and pinched the bridge of his nose. "That's not why I'm telling you this."

"Then why?"

"He used magic without a wand."

Fudge seemed dumbfounded by this new information. He stared back and forth between Tom and the boy as if waiting for someone to tell him that this was some bad joke. "What did you say?"

"I don't have a clue what he did to that guy," Tom started, "but he used magic to make the guy disappear without use of a wand. He doesn't even know what a wand is!"

The gray haired man was silenced for a few seconds. "The boy made the Death Eater disappear? Apparate maybe?"

"No," came Tom's resolute reply. "I don't know what he did but that man did not apparate."

"I'm right here you know," Bakura growled, getting aggravated that he didn't know what was going on. "Stop talking like I'm not."

Fudge appeared a little flustered as he cleared his throat. "Right, yes. What is your name and how old are you?" He grabbed a pen and a blank piece of paper which was quite an accomplishment in itself since almost all of the papers on the desk and ground were full of writing.

"Ryou Bakura," the teen grumbled. "I'm sixteen."

"Are you currently attending any Wizarding schools?"

Bakura glared at the man, trying to discern if the Fudge was actually asking that question. "No. I'm afraid Merlin hasn't come to visit me yet."

Fudge looked up from his papers and frowned. He didn't like the boy already. "How long have you been able to use magic without the use of a wand?"

Bakura shrugged, deciding to go with the time he first appeared to Ryou. "Probably since I was eight. Never used it until a year ago though."

"Eight?" Fudge coughed and scribbled more down. "Have you ever been contacted by owls of any kind?"

"Owls?" Bakura snorted. "Are you high?"

Fudge chose to ignore the boy's question. "You've never been contacted from a Wizard?"

"For the last time, no," Bakura growled. "I'm leaving now."

As Bakura turned to walk away, Fudge stood up. "You cannot leave until I have contacted the rest of the Ministry on what to do. Tom, give this boy a place to stay and some food."

Tom nodded and lead Bakura out of the room, grumbling something about too many 'free' rooms being rented out. Right before the door was closed, Bakura could have sworn he heard a loud cracking sound, like a gun shot, from inside the room. Then silence.

~Accidental~

Ryou walked back and forth in the room he had been assigned, nervously rubbing his hands against his pants leg. The cheerful decorum did nothing to help his mood. Hysterical laughter bubbled out of his throat. Of course something happened; it was Bakura after all.

Bakura hadn't said much to him before he had disappeared to the recesses of his mind to either plot something maniacal or sleep. And what he had said hadn't made much sense. Something about foolish mortals, people on crack, and Wizards; yeah, that part was kind of strange.

He finally stopped and decided to sit on the bed. It sunk under his weight, creaking lightly. He bit his nails, mind racing. Everything would be fine, he told himself. It had to be some sort of mistake. He wasn't going to go to jail.

Jail! He bolted up from his sitting position, eyes impossibly wide. What if he did go to jail? What then? What would he tell his family? "Oh Bakura," he mumbled to himself, putting his face in his hands, "why did you have to go out and do something like this?"

There was a knock at the door, making him jump in surprise. "He-hello?" he called out, peering curiously as the door slowly opened.

Tom finished opening the door, eyes studying the nervous boy before him. "They're ready to see you now."

Ryou gulped, color draining out of his face. It was almost like an execution. What could he have possible done? He stiffly walked out of the room and took his place behind Tom, after coming to the conclusion that he wouldn't make it if he ran.

"In here." Tom smiled kindly at the boy as he opened the door. The teen had done a complete 180. Before he had seemed cold, detached, and quite frankly terrifying. Now, he was the complete opposite, those doe eyes showing terror.

"Th-thank you," Ryou stuttered, walking into the room. After a encouraging thumbs up from Tom, the door closed, creaking lightly. The room was lit by candles and the curtains were drawn over the windows, allowing no one to see what was happening.

"I keep on telling him he should oil the doors," came a voice from the chair in front of him. It was a hearty sound, full of warmth and kindness. It really should have put Ryou at ease, but his nerves were getting the best of him.

Ryou just stood rigidly in place, staring at the man in front of him. The man was sitting down on a chair a few feet in front of another more plush one. He was in long robes and had a long silver beard matching the color of his hair. He peered over him with half-moon spectacles.

"Please have a seat," the man said, gesturing to the seat before him. "My name is Albus Dumbledore."

"I didn't do it!" Ryou blurted, slightly shocked at his own outburst. "Please don't send me to jail."

Dumbledore chuckled. "Is that why you think you're here."

Ryou blinked. "Isn't it?"

"I assure you, you will not go to any kind of jail." Another kind smile finally put Ryou at ease. "Now come and sit. We have much to discuss."

Letting out a soft sigh, Ryou walked over and sat down on the chair. He closed his eyes for a moment, collecting himself before he looked back at the person before him.

"Now, I heard from Fudge that you used magic without the use of a wand," Dumbledore said, still smiling that warm smile. "Sometimes he can get his information wrong, so I just want to clarify this. Did you indeed use magic without one?"

"Without what?"

"A wand," he repeated.

"A what?"

Dumbledore appeared slightly troubled at this. "A wand my dear boy." After another clueless look, he continued, "Are you telling me you have never used a wand?"

"Will all respect, but I think I would know if I had used a - erh - "wand" before." Maybe this was what Bakura meant when he was talking about the people being high?

"May I ask where you live?"

"Japan," Ryou said distinctly, glad that there was some constant in this conversation. "Domino City. I'm just here to visit some relatives for a few months, then I'll be going back."

"And how long have you been able to use magic?"

Ryou felt a piercing fear twist his stomach. They knew he used magic? He was about to bolt or scream, or maybe both, when Bakura sent a wave of calmness and a number. "Eight?"

If Dumbledore had noticed the momentary change in Ryou's attitude, he did not show it. "And no one contacted you," he spoke softly, more to himself than Ryou. "We'll just have to fix that. Ryou Bakura, it appears there was a mistake, would you be interested in learning new kinds of magic at the Hogwarts school of Witchcraft and Wizardry?"

"The, erh, what?" Ryou stuttered.

Dumbledore chuckled. "I am inviting you to attend our school of Witchcraft and Wizardry. It will help expand your magical powers and keep them in check. However, I must warn you that if you do come study with us, you will have to do a lot of catching up to do. Most start school at the age of eleven.

Ryou paused for a moment, taking it in. A whole other world where no one knew his name nor the spirits. "Would it be alright? I mean, I wouldn't be a burden would I?"

"No, of course not. We always love for more people to come and reach their full potential."

"Okay," Ryou mumbled, smiling slightly. "I would like to attend this school, but what should I tell my father?"

Dumbledore beamed at this new information. "It is solely up to you. Many tell their parents that they are going to a Wizarding school, but be warned: only your immediate family can know. You can choose whether or not to tell him." He pulled out a parchment from his robes and handed it to him. "Here's a list of all the things you will need. I will send Hagrid in three days to help you get everything on the list. I'm afraid I have much to do. Have a good day Mr. Bakura and I will see you in Hogwarts." He winked at Ryou before disappear with a crack.

After getting the initial shock over a man just disappearing before him without being swallowed by some evil creature of the shadows, he turned to the parchment.

"Crap," he whispered. How was he supposed to pay for all of this?

~Accidental~

I hope it went okay. I decided to change it up a little bit and make it so Dumbledore doesn't know about the millennium items. I hope it was alright. Also, don't you think there could be a band called the 'you-know-who's'? Ha, ha. Sorry, couldn't help myself!

As for the title, 'accidental', I think it gives it away. 'Accidental' simply means a sign indicating a momentary departure from the key signature by raising or lowering a note.

Most likely, I'll be slow to upload the next chapter so please be patient. Thank you so much for getting through this first chapter. Please, please, please review!

Thank you!