Hello, people. I haven't read Harry Potter recently, but as I write this I'm reading The Order of the Phoenix again, so it should be fine. I also haven't watched Yugioh in a while, but it's fine. I promise. Anyway, look below for all the stuff you might want to know before reading. Also, I'm using the English dub names for the Yugioh characters.

Bits that are AU:

Ron and Hermione aren't prefects. If you remember, Ron and Hermione were prefects during the Order of the Pheonix book, but it would be a bit harder to write and less enjoyable to read for this story, so I left that out.

Seto Kaiba believes in magic. Now, before you freak out, let me explain. He believe in the whole Egyptian magic thing, not the wizarding world magic, which he's never heard of. This isn't a fic about Seto realizing magic is real, so I had to do this. I'm sorry.

Age/Backstory. There's a few small changes in Seto's age of adoption and all that stuff, but nothing major. He's also 16 in this fic, like in the Japanese version.

Time Period the Story Starts In:

Yugioh: It's pretty much after everything happened, except the pharaoh's still here. Seto and everyone else still goes to Domino High.

Harry Potter: Order of the Pheonix book, before Harry's Trial, but after he's arrived at 12 Grimmauld Place.

Ages:

Mokuba: 11

Seto: 16

Yugi & Co.: 16

Chapter Length: 2,247

Disclaimer: I don't own anything but my words. I don't own Harry Potter or Yu-Gi-Oh.

STORY BELOW

It was a quiet night at the Kaiba household, broken only by the incessant sound of typing. There was something off, though. Seto could feel it.

He wasn't quite sure what it was, but it was enough to unnerve him. Now, Seto wasn't a superstitious man by any means, but he'd been through enough to know not following his instincts was a bad move.

Pausing his typing, he checked the time. 12:30 P.M. Not that late yet, he mused. Closing his laptop, he exited his room, choosing to go check on Mokuba rather than worry through out the whole night. Lucky enough for him, their rooms were side-by-side, a product of both Seto's paranoia and Mokuba's frequent nightmares.

Pausing outside his brother's door, Seto wondered if it would be better to simply walk in to avoid waking up Mokuba or to knock in case he was awake. Before a decision could be made a loud crack issued from the room.

As you could imagine, Seto did not waste time knocking.

There was a scream, presumably from Mokuba, and another crack.

When Seto entered, it was rather messy in the room with various games and game pieces strewn about haphazardly as well as books littering the floor. Amidst the clutter though, something, or rather someone, was missing.

Mokuba.

In the days following that fateful night, Mokuba's disappearance had been kept very hush-hush from all except for those who would be able to aid in the investigation. Since most of the Kaiba Corp. staff couldn't fit in the latter category, they had been told Mokuba was off for some sort of academical program.

And maybe that was why the secretary was so easily influenced by the simple spell. She had no idea one of the Kaibas was missing or how the guards had been told to not let anyone in without proper clearance. How would she? And the guards- you could forget about them. They weren't nearly smart enough to realize they were being tricked.

"Could I have your name, sir?" the secretary asked the odd figure in front of her cheerily. She was new to her job and only in her early twenties, but for the most part she wasn't bad. She did, at least, know not to question someone's appearance, even if they were a bit odd looking.

"Albus Dumbledore, at your service."

"Do you have an appointment?" she asked him, giving him an odd look as she looked him over a bit more thoroughly. He wore a simple brown suit, completed with a reddish colored scarf. His hair was long and gray, down to his shoulder. He also had a short beard adorning his chin.

Seeming to think a moment before answering, he replied, "Yes, I do."

Frowning, the secretary looked at the computer. She hadn't seen an appointment under the name Dumbledore. Suddenly, a warm feeling washed over her. She looked up, startled, but seeing nothing suspicious, looked back down at the screen. Oh, there it was. Albus Dumbledore, 8:30 A.M.

Wondering how on earth she'd missed such a noticeable name, she quickly directed Dumbledore to the elevator.

"What a peculiar man."

Click, Click, Click

Seto loved technology. Anyone could tell that. But after spending practically every waking hour staring a computer screen for two days... well, that could make anyone be a bit tired of it. Especially when the keys were always so loud when pressed...

Pausing from typing he gazed at the screen, glaring slightly. Nothing. He'd found nothing. He had no idea who'd taken Mokuba or why. Pegasus seemed to be clean, as did his business partners and rivals, but then who could have taken him?

Standing up furiously, he shoved the Kaiba Corp files off his desk. A childish display of rage, maybe, but he was too angry to care. He'd never had something happen like this before. Whenever Mokuba was kidnapped, It was always for ransom or to get at Seto himself, so naturally he'd always been contacted by the kidnapper.

But not now.

He's gone. You failed, simple.

Clenching his fists, he willed himself to calm down. It wouldn't help Mokuba for him to have some temper tantrum, and he knew it. But, it was easier thought than done.

Suddenly, there was a loud crash as the windows in front of him shattered, spraying glass unnervingly close to where he was.

Seto jumped, rage disappearing as quickly as it had appeared, and looked on warily. He wasn't sure what exactly was wrong with the glass in his office. It had happened a few times before, though not to this extent. He'd assumed, though, that the glass was weak and not very impact resistant, allowing it to break easily. It was a bit less explainable when the whole wall of windows suddenly shattered, though.

He didn't have time to wonder about something as silly as glass now, though. He had a brother to save.

Before he could continue searching for a possible kidnapper, a knock came from the door.

And just like that, he was furious once again. He'd told the ditz of a secretary to reschedule all meetings and appointments, and he'd told the brainless guards to not let anyone in unless they were given specific orders to. Yet still someone managed to come and annoy him. He swore, if it was Yugi, he'd...

But, as he soon realized, it wasn't Yugi. The man before him wasn't anyone he recalled meeting, not that he remembered most of the people he worked with. The man also looked a bit old to be someone he worked with, but it was possible.

"What do you want?"Seto asked, giving a good effort at keeping his voice civil.

"Please excuse me, I understand you're busy. My name is Albus Percival Wulfric Brian Dumbledore. And, I presume, you would be Seto Kaiba?"

Eyebrow twitching Seto ground out. "Yes, yes I am."

"Splendid," was the overly cheerful response he received.

"What is it, exactly, that you want?" the CEO asked again, debating seriously on whether or not to shut the door on this loon's face before he wasted any more time.

"Well," Dumbledore responded, "I have some information you might find of use."

"That sounds wonderful, but I'm rather occupied at the moment, so if you wouldn't mind-"

"I know who has your brother."

Dumbledore watched the boy for any sign of emotion. Even in all of his years of teaching, he'd never met anyone quite like Seto. And it wasn't just because he hadn't had the pleasure of meeting any teenaged billionaire CEOs in his years.

Seto was... different. He was much more guarded than any children- and that's what Seto was, really- he'd met before, even Tom. But there was something beyond that... something that, no matter how much Dumbledore tried, he could not pin-point.

He watched as the boys blue eyes widened for the briefest of moments before narrowing suspiciously.

"How do you know about that?" Seto asked, voice as level as ever.

"Well, Seto- or Mr. Kaiba as I'm sure you prefer, it's quite a long story. May I come in?"

The boy gave him a wary look before unblocking the door.

"Ignore the glass. There was... an accident earlier. It will be fixed shortly," the boy told him. The pause wasn't lost on Dumbledore.

"Has it happened before?" the headmaster asked conversationally.

"Excuse me?" Seto asked, eyes widening and giving Dumbledore the feel of having asked something inappropriate at a formal dinner party.

"The glass, I mean. Have you shattered it before," he repeated easily as Seto guided him to a seat in front of his desk.

"I'm not in the habit of shattering glass on purpose, Mr. Dumbledore, but that's not exactly relevant, is it?" Dumbledore couldn't help but be slightly surprised slightly by the change of attitude. At his desk, Seto was much more in control. More business-like. More like the headmaster had expected. Though maybe it could have been the shock of having broken the glass- which Dumbledore had heard before entering- that caused the CEO to act less formal before.

Dumbledore's next response would have to be more thought out than before. He couldn't just tell the boy where his brother was until he'd convinced Seto of the wizarding world. To do so, though, he would have to lead in slowly. If he angered the CEO too much, he might refuse to come with Dumbledore, and that was obviously not an option at this point.

"Are you so sure? I find it to be very relevant," Dumbledore responded, trying to get a feel for how the boy would react.

"How so?" was the response he received, the even tone not giving away any clues as to Seto's feelings on to subject.

"Tell me, Mr. Kaiba. Were you upset at all right before the glass broke? Angry that you brother was gone and you couldn't figure out how to get him back?" Dumbledore was treading on thin ice here and he knew it. One wrong word and it would all be over.

Seto showed no reaction at first before glaring slightly at Dumbledore. Icily, the CEO replied, "I fail to see what this has to do with my brother."

Success. Dumbledore had managed to guess correctly at what had happened. Now though, he could tell that the boy felt rather threatened, and probably more than a little confused. Seto was an amazing actor when he needed to be, but the headmaster knew far too much for the facade to succeed.

"More than you would first guess," Dumbledore replied, to Seto's great annoyance. The headmaster needed to steer towards a more sensitive topic now, though, if he was to tie this all together.

"Your parents are deceased, correct?"Dumbledore asked, watching for the boy's reaction.

Seto closed his eyes for a moment before responding in a voice that clearly told Dumbledore he was crossing a line,"Yes, that's correct."

"I knew your mother. Not personally, but Sarah was a friend of a friend, as you can imagine."

Seto gave him a long, calculating look before responding in an irritated voice, "What is it you want?"

Dumbledore smiled. Success. "I wish to tell you something."

Seto's eyes flashed before responding angrily, "About what exactly? My mother? Or Mokuba finally? I don't have time for this."

"About you," the headmaster replied simply, not deterred by the quickly changing moods of Seto.

Before the boy could retort Dumbledore continued. "You broke those windows, correct? You were angry because you couldn't find your brother, and your emotions took hold. It's happened before as well. Yet let's look before that. You don't remember your mother well, do you? Maybe a bit about her appearance, maybe her smile, but not much. Your father, though, you remember him quite well. He was a paranoid man. Hated owls, perhaps? Whenever something happened, like the unexplained breaking of a window, your father would panic. Your adoptive father always blamed you when something like that happened, I assume? And when he died as well and you were alone with your brother, things like that still happened. Your brother had gotten used to it by then, but he would ask you why it happened. You thought of logical reason to tell him. You assumed the glass was simply fragile and got hit by something when it would spontaneously shatter. It didn't matter that you had probably switched the company you got glass replacements from numerous times. Does this sound familiar?"

There was a long pause in which Seto attempted to absorb everything the man in front of him had just said.

"What exactly are you trying to tell me?"

"You're a wizard, Seto."

Seto was furious.

No, he was beyond furious, he was enraged.

And then the man decided to throw Seto's whole life back at him.

And now... now he was just confused.

"You're a wizard, Seto."

What was that supposed to mean? Was he in with Yugi or something?

"There's a whole world of wizards, simply hiding in plain sight from the muggles, that is, those not wielding magic."

This man was crazy. There were limit as to what Seto was willing to believe and he was pretty sure this breached the limit. He'd barely been able to believe Yugi's whole 'millennium item' speeches.

"One of the wizards wishes to conquer this world. He is often called you-know-who or he-who-shall-not-be-named."

"What exactly does this have to do with me?" Seto asked at last.

Dumbledore just smiled sadly.

"He has your brother."

Hope you guys enjoyed it. I don't have a beta so sorry for spelling and grammatical mistakes. I enjoyed writing this, so if you guys like it I'll continue.