Disclaimer: So one day, I was just taking a stroll in Ningenkai, and all of a sudden, this person came up to me and said, "You don't own Yu Yu Hakusho!" and I was just like. "oO What are you talking about, of course I do!" But then I realized this.person.was.a.lawyer, and I was like. "No, no, no, nevermind. I don't own Harry Potter OR Yu Yu Hakusho, as much as I'd like too."

Warnings: Erm. Spoilers for the fifth book, as this is taking place after that. The timeline for Yu Yu Hakusho is before the Makai tournament, because I've only seen clips of that, and...just because. Maybe some implied shounen-ai, swearing, mild violence, and... Well, I'm not sure what else. Oh, and any typos are because I didn't catch them when I edited, and because that Microsoft Word hasn't been installed onto my laptop yet. Sorry if anyone seems OOC. It's just how I see the characters.

Once Upon a Time

A Prologue of Sorts

Japan, 1981.

Minamino Shuuichi, alias Kurama, looked disdainfully at the cloaked people lining the streets, an almost comical look to see on what seemed to be a five-year old child's face, had it not seemed to fit so well. Quite murmurs and much louder, exuberant shouts were heard all over, most repeating the same thing.

"-Lord is dead!"

Kurama blinked owlishly. Lord? His brain struggled to puzzle out what they were talking about. Wizards... Lord, lord...? Oh yes. Lord Voldemort. The Dark Lord. He-Who-Must-Not-Be-Named. More commonly known as You-Know-Who. The redhead's lip curled. So Voldemort was finally dead, by the looks of it.

First day of July, Level Five, Departement of International Magic Co-operation, incorporating the International Magic Trading Standards Body, the International Magic Office of Law and the International Confederation of Wizards, British seats, in the Ministry of Magic, London, England.

Harry Potter sat in the large office of Sirius's lawyer, one Miss Brooke Frayne. Several days ago, Harry had recieved an owl informing him that his godfather was pardoned of all accusations, and he was requested to attend Sirius's will reading. The Boy-Who-Lived had Floo'ed here with the Weasley's, who were currently in chairs around the room also. Harry bit his lip, drawing blood, not making eye contact with any of the other wizards and witches in the room. He clenched his fist.

The door shimmered over each person as people entered, checking their identity. Remus Lupin, Hermion Granger, Albus Dumbledore, Rubeus Hagrid, Minerva McGonagall, and surpisingly enough, Severus Snape, all took a seat. Brooke Frayne glanced around in briskly. "Right. Is everyone that's supposed to be here, here?"

Several murmurs and nods of agreement could be seen or heard.

"All right. Let's get down to business. We're here for the reading of Sirius Black's will, one of the last of his family." Brooke Frayne withdrew a small sphere from her robe pockets. The sphere was similar to the one in which Trewlawney's prophecy had been in. Miss Frayne dropped the small glass sphere onto the carpeted floor, the sound of glass breaking muffled by the thick carpet.

The shadowy image of the late Sirius Black rose up from the shattered remains of glass. Harry drew back a breath, as did many other occupants of the room.

Sirius's image surveyed the room, and started speaking. "I, Sirius Black, being of sound mind and body have spoken this will witnessed by my lawyer, Brooke Frayne, along with my dear friend and Marauder, Remus Lupin." There, the image of the late Sirius Black paused. "So, let's being this will."

Harry listened numbly as his godfather left Lupin 3 estates, a large number of money, and his best regards. He smiled weakly as the Weasley's jaws dropped at the amount of money Sirius left them. Harry sat, eyes teary while Sirius talked to Hermion, Professor Dumbledore, Hagrid, Snape, and Professor McGonagall.

"...and to my favorite godson, Harry James Potter, I leave with the remaining money, stocks, properties, investements, vaults, and businesses. You won't be able to access a lot of this until you're at least 20, but there is some money set aside in a vault for anything you might want. Consider it your birthday present for... well, the rest of your life. Don't start a Muggle rug scam, or anything Harry, or I'll come back from the dead and kick your butt." The image grinned. "Don't worry, I'll be watching over you, and so's your mom and dad. We all love you, don't forget, don't go into depression, and don't do anything too crazy." Sirius paused there. "Oh, and just to let you know, kiddo, you DO have some other relatives. Besides the Dursley's, that is. I expect they'll be turning up soon." With that, the figure disappeared with a small poof as Harry accepted the large trunk containing documents and keys, puzzling over the last part of what Sirius said, and blinking back tears.

Molly Weasley tugged softly at Harry's arm. "Harry dear, we'd best get going." Harry looked up at her with a start.

"Oh, right. Thanks for letting me use your fireplace, Mrs.Weasley." Harry thanked her, following her and the rest of the Weasley's out of the room.

"It was no problem dear. Why don't you stay for dinner before going back?"

"All right."

July 2nd, Japan.

The slowly rising moon and streetlights lit up Tokyo as the sky started to darken and night started to fall. Minamino Shuuichi, more commonly known as Kurama by his friends, slowly walked home.

Kurama stepped through the door of the Minamino residence, and was met by a slightly worried looking Shiori. Kurama noticed the look instantly.

"What's wrong, 'kaasan?" He asked softly.

"Shuuichi, there's something I have to tell you." Shiori ushered Kurama into the kitchen, sitting down at the table. She wrung her hands, frowning slightly. "Do you...believe in magic?"

Kurama looked briefly startled. Magic? What in the world- "Wha- Oh." He smiled at his mother. "Mother, if you're talking about the wizarding world, then I've known for a long time." He paused. "The old psychic Genkai told me about them." Kurama fibbed.

"She did? So you must know about the Boy-Who-Lived, and Voldemort?" At Kurama's nod, Shiori continued. "Well, you see dear, Harry Potter happens to be your third cousin."

Later that evening.

"Apparently my human mother is a witch, along with my stepfather and stepbrother, and the savior of the wizarding world is my third cousin." Kurama told Hiei sarcastically, lounging on his bed. The small youkai blinked at the youko in surprise from his seat on the window.

"...Really." Hiei flatly stated.

"I'm entirely serious Hiei." Kurama replied seriously, dropping his sarcastic tone, and noting Hiei's reaction. "Now she wants me to go and pick him up from England, and bring him here to stay for the summer. Something about his aunt and uncle not treating him right. And you know how Shiori has a soft spot for children."

Hiei 'hn'ed noncommitally. "So are you going to do it?" the little half-koorime questioned Kurama.

"I can't exactly say no. So yes, I am. Besides, I'm the only one who can speak english fairly well." Kurama sighed. "Not to mention 'kassan's already got the tickets. The plane's leaving in two days."

A/N: Hmm... I was going to make it a bit longer, but then I decided not too. So, I've jumped the bandwagon and yet another HP/YYH story is out there. No, The Tantei are not going to be going to Hogwarts as undercover students. Or students. Actually, I might change the students part, but they're not going to be undercover. Yuusuke, Kuwabara, and others in the next chapter. Sorry if anything seems rushed, I just couldn't get it to flow smoothly.

I have NO idea of what a real will reading is like, having never been to one, so any real resemblance was either pure luck or random bits of information I think is real. Erm... I'm still not entirely sure when this will be set. Maybe after the Sensui arc, right before the Makai Tournament Saga, or right after the Dark Tournament and before the whole Sensui thing. I'm putting before the Makai Tournament for now because I like Mazaku Yuusuke. Among other reason.

Comments, feedback, reviews? Something other than just 'update soon!11!'

... I'd probably still continue anyways, but I would like to know if someone's reading. XDD