Disclaimer: I do not own Hellsing or Yu Yu Hakusho or any of the characters or concepts contained therein. No profit is made by the writing of this fic bar my own entertainment and hopefully the entertainment of others.

Author's Notes: This is a crossover of Hellsing and Yu Yu Hakusho, set after the conclusion of both anime series. For Hellsing, this means that no information about the Millennium organisation has been revealed. It also means that Seth was in fact summoned at some stage and Integra is missing the 'Fairbrook' portion of her full name. Please keep in mind that I have read only up to the third volume of the Hellsing manga and therefore have absolutely no idea of how the whole Millennium thing pans out. I've met Dandy, the Mad Major and the 'Dok', heard of Rip and Schro, but that's about it. I have seen the entirety of both anime series. Since the majority of this is based entirely around Hiei and Kurama, I think I'll be all right on YYH-pertinent details. But do not hesitate to tell me if you think I'm wrong – I only have really, really bad English subtitles for everything following Genbu in Maze Castle to go on.

Warnings: Violence, abuse, rampant innuendo, homosexuality, heterosexuality and other potentially offensive things. To be absolutely blatant, this will involve SHOUNEN-AI. That means a MALE-MALE RELATIONSHIP. (Funny how that's somehow the most offensive thing, isn't it?) If you don't like it, don't read this fic. If you do read it and you get narky at me, I will laugh at your stupidity.

Pairings: (If you didn't catch it from the aboveâ€) Kurama/Hiei. Seras/Alucard. And an itty, litty, bittle piece of Integra/Enrico – yes, I am weird. ;P

PRELUDE TO WAR

Part One – Back to the Front

In a dimly lit but nonetheless stately office with a chessboard ceiling and floor, a young woman slouched in a high-backed leather chair, if it could be called slouching. Sir Integra Wingates Hellsing did not slouch, nor did she lounge. But whatever it could be called, it was not an optimistic form of sitting.

People were dying. There was not an exceptionally large body count yet – there were only three bodies in the morgue. However the state of those bodies was bad enough to encourage a swift, decisive end to the killer. The blood had been drained from the victims; that much was true, but these were far from average vampire attacks. The bodies had been skinned except for the scalp, which had been shaved of all hair. The eyes had been removed completely.

The corpses had not turned into ghouls, which gestured away from a FREAK attack and indeed from a vampire attack in general – at least two of the victims were most definitely not virgins. Integra had spoken to the children of both victims.

She felt vaguely ill letting herself realise that both lumps of bloodless, mutilated flesh had a partner and children. God.

Integra stubbed out her cigar in the glass ashtray beside the open manilla folder on her desk. She was thankful beyond belief that the photographs the folder contained were in black and white. She didn't want to see the corpses in full colour ever again. Nevertheless, she allowed her mind to sift back over the information that the Hellsing agency had collected.

Integra's platinum blond hair hung to the middle of her back. It was the only part of her that was completely untamed, but even it hung straight, uniform and businesslike, running in a fine pale gold river over slim shoulders clad in a white business shirt and a bottle green suit. One lightly browned, slim-fingered hand flitted to the sky blue tie at her neck to adjust the tiny gold cross, pinned there.

She and the rest of Hellsing had no idea of what could have attacked these people, but it was sure to attack again. Integra closed her eyes and frowned a little more deeply, feeling a tension headache start to build behind her temples. Whatever it was, it drained blood. That suggested vampire. It also mutilated things. That, to Integra, suggested FREAK. But she had been through this train of thought a dozen times – if it was a FREAK, why hadn't the corpses mutated into ghouls? Unless the manufacturers of the FREAK chips had somehow managed to cut off that particular aspect of vampiric nature

Integra scowled darkly and dug in her pocket for her pack of cigars as the door opened soundlessly on well-oiled hinges. Walter, her faithful retainer and butler, approached bearing a tray with a pot of tea, a small plate of biscuits and some brightly coloured wrappers that looked to Integra like butterscotch. The man's dark hair had greyed a little since the incident at the Tower of London in response to the trauma, but his hairline had receded no further and the man was as sharp and quick-fingered as ever. Integra suddenly found herself not holding her cigars.

"Try sugar first." Walter suggested, his voice pitched at the pleasant, well-modulated tone that Integra had come to expect of him over the years. She glared at him as he smirked almost imperceptibly and took a candy irritably. Walter poured her a cup of tea and sweetened it in accordance with the butterscotch she had just popped into her mouth.

"It's getting dark." She muttered.

As though on cue, a low chuckle emanated from the wall to Integra's left. A tall, pale-looking man with blood-red clothing swaggered out through the wood paneling. He made a mocking sort of bow and grinned, teeth too long and sharp to be human flashing obnoxiously in the dim lighting. "My master."

Integra's frown deepened. "What do you want, Alucard?"

The vampire Alucard grinned ever wider, the lenses of his circular glasses glinting the shades of the sunset behind the closed blinds. "How rude."

Integra and Walter both gave the vampire a look. The young director of the Hellsing organisation said, "You've found something." Alucard's smile became, if possible, more satisfied than ever. "Start talking."

The vampire's lips twitched, but evidently he had decided not to irritate his master tonight. "There are two demons in a hotel room about five blocks east of Hyde Park."

This had little effect on Integra's irritated expression, but she did stop chewing her butterscotch. "Demons. In a hotel room."

"To be precise, one demon and one in possession of a human form." Alucard replied airily. "The demon has an admirable eye collection." Integra chewed violently on her butterscotch. There was a loud crunch and a soft sound of pain as she tried to detach the sticky substance from her teeth. Walter proffered tea. Integra took it without so much as batting an eyelid.

"They must be behind the deaths. In any case, I will not have demons in this city. Alucard, take the police girl with you. Search and destroy."

Alucard's lips stretched into an enormous Cheshire Cat-style grin and he faded into nothingness almost immediately, leaving only the grin behind. The teeth clicked lightly, eerily together as he replied merely, "My master."

Seras Victoria was not particularly happy to be hauled out of her coffin at the crack of dusk, but neither had she been particularly happy to be in the coffin in the first place. So it was with a particularly apathetic view on unlife that she clambered out of bed and pulled on her boots at the behest of an uncharacteristically elated Alucard.

"Wh-wh-what are you so happy about, master?" She asked, stifling a yawn and brushing the other hand through short, scruffy strawberry-blond hair to get it into line. Her master smiled down at her and Seras felt a little chill of foreboding run down her spine. When her master smiled like that, people died.

"We're going demon hunting."

A/N: Comments are appreciated.