Yoruko: *eating a cheesecake she bribed Sebastian into giving her instead of Ciel*

Ciel: *Glaring* At least have the courtesy to give me a piece.

Yoruko: You're not family, have no authority over me, and are younger than me. So because you demanded instead of asked… I don't think I will. You can always have Sebastian make another one for you anyway.

Ciel: How did you talk him into giving it to you anyway?

Yoruko: *points*

Ciel: *looks and sees Sebastian playing with a pair of cats* Oh…

Summary: The Phantomhive manor is a strange and sometimes even dangerous place indeed. Everyone who is familiar with the Phantomhives and has been to Phantomhive manor knows this. However, there is one oddity: Sebastian forbids even Ciel from entering the basement… he keeps anyone, guest, staff, or his master from even opening the door to the basement. What exactly is he hiding in the basement… and what happens when the secret is revealed?

Disclaimer: No, I don't own Inuyasha or Kuroshitsuji.

Crossover: Kuroshitsuji

Pairing: Kagome/Sebastian

Warnings: blood, gore, violence, possibly language

Kuroneko

Anyone familiar with the Phantomhive manor knew it was strange, both the estate itself and those who dwell there. Its staff consisted of a pyromaniac of a chef Bard who can't cook because his refusal to cook without explosives results in him being unable to make anything besides charcoal, Finny, a gardener who was a feminine teenage boy with an insane amount of strength for a human and a tendency to kill all plant life on accident, Meirin, a clumsy maid with an unnoticed perverted streak, and Tanaka, a Japanese steward who wasn't incompetent unlike his coworkers but was rarely seen doing anything other than drinking tea. The lord of the household was twelve year old Earl Ciel Phantomhive, an orphan who ran the Funtomhive toy company, acted more like an adult than a child most of the time, (he was more mature than the trio of disastrous servants) and was famous in the underworld and the black market for being the queen's "guard dog".

But none were more unusual or outstanding than the butler, Sebastian Michaelis. Because of the incompetence of the trio, he ran the entire household by himself. There seemed to be nothing Sebastian Michaelis could not do and everything he did he did perfectly. He appeared to double as Ciel's bodyguard at times. Sebastian was mysterious, even Ciel knew little about him, just that he was a demon he had made a contract with who had an annoying (in Ciel's opinion) amount of affection for cats.

The entire household was strange. Bard, Meirin, and Finny knew little about Ciel and the estate. There was much that even Tanaka, who had worked there when Ciel's father was alive, didn't know. Strangest of all, though, was this: Sebastian allowed no one to go into the basement. Not even Ciel went in there and no guests were allowed either; and no one, not even Ciel, knew why this was. When asked, Ciel simply said to "Listen to Sebastian. I won't be held responsible for the consequences should you disobey." So neither servant, guest, nor even the lord of the household ever opened or even touched the door to the basements and none knew what secrets lay there. (Not that Ciel cared- even if he was curious himself.)

It was late at night. The occupants of Phantomhive Manor were all asleep. All, that is, except for Sebastian. The black-clad butler made his way to the basement, holding a candle. He closed the door behind him and then went down the stairs and into the basement.

Most who didn't know Ciel or who hadn't known the Phantomhives in general would have been surprised. Those who both knew and had a brain and eyes, however, might still be surprised to some extent but would have, even if only in the back of their minds, at least slightly expected it. In true Phantomhive style it was surprisingly luxuriant for a basement. The floor was even carpeted.

What most would not expect, however, was how the basement was decorated as if a home- something like the Victorian equivalent of a large, lavishly decorated modern-day apartment or a modern day small one-floor house which was lavishly decorated. There was even furniture, of course- black, blue, and green, and all metal in sight was silver. Lounging on the velvet couch was a black cat with blue-green eyes that were strange but beautiful for a feline. Sebastian smiled at the sight of her- for the feline was female.

"Hello. I hope I haven't kept you long." He said as he sat down on the other end of the couch.

The cat only mewed in response and moved so that its head was against Sebastian's side. Sebastian smiled again and started to scratch just behind her ears.

"You're quite lucky, you know. You don't have to deal with those three or with bocchan. Really, it can be quite tiring, looking after his every whim and cleaning up after the trio's antics."

It was strange, Sebastian mused, that this creature was the only one that he confided in. At least, it appeared to be so. However, even with his love for cats aside his interaction with the cat was far, for those who knew of the supernatural, from unusual. No, what made Sebastian find it strange was quite different than the fact that she was a cat.

Suddenly, there was a brief flash. Then instead of a cat lying next to Sebastian, a woman sat next to him. She sat with her back against him, head on his shoulder, legs going over the arm of the couch. She was quite beautiful, with straight, waist-length blue-black hair, blue-green eyes, and her black suit- even the shirt was black- with no tie, its longer than normal (knee-length, in fact) suit jacket, and black boots. (Of course, in colder or stormy weather she exchanged the knee-length suit jacket for a normal-sized one and wore a black trench coat instead.)

"I suppose, I do enjoy having some peace and quiet for the first time in a long time- I can't remember the last time I was able to truly relax. At least you have free entertainment, though. I quite enjoy reading, but I'm often bored when I'm down here."

Sebastian chuckled. "Well, you won't be bored for long. Bocchan has been asked to go to London by the queen to investigate a series of murders. I get the feeling that it would be wise to bring you along."

"Is that so?" Kagome stated. "Good. I enjoy the thought of messing with Ciel-san, and I'm in need of more entertainment."

"Of course." Sebastian smirked. 'I'm certain that Bocchan's reaction to her will be quite amusing. She does love children and anything she finds fun or adorable, after all. And just like a real cat, he'll never get her to listen to him unless he asks nicely or she either agrees with or feels like doing what he says.'

And with that they talked long into the night, as they often do when he comes down to the basement to see her. After all, being a demon Sebastian doesn't need as much sleep as humans do. And as for Kagome? It has been a very long time since she was human; even if she were she often has little to do other than sleep anyway.

As Sebastian made his way to his room, he smiled. This job may be irksome at times, every once in a while trying even for him- his patience at least. But Kagome made it all worth it. Talking to and interacting her melted away any stress, minor though it may be, that had built up over the day- or whichever length of time had passed since his last visit. He doubted he would ever admit it, but she was probably a good part of the reason that he is fond of cats. He would admit, however, that he is extremely fond of her. After all, Sebastian saw no reason to hide or be ashamed of your feelings towards a person, whether said feelings are positive or negative. Even if he tended to put up a faux-kind façade. (The manners, of course, are real. Being rude is one thing Sebastian rarely abides by, even if he usually pays no mind to the rudeness of others.)

Two days later loose ends that could not wait were tied up, things were set to be taken care of while Ciel and Sebastian were gone on 'vacation', and master and servant were ready to leave. Without Tanaka and the Troublesome Trio, of course. They'll only get in the way. Kagome, of course, stowed away among the luggage. Having a feline form really came in handy sometimes. Especially when said form didn't affect Ciel's allergies as real felines tended to.

Because there was no way that Kagome was being left out of this adventure/misadventure. Sebastian promised entertainment and said that she may be needed, after all. And there was no way she was staying at the manor. The incompetent goofballs known as Ciel's servants could very well destroy the manor or burn it down, and Kagome refused to be in or for that matter even near the manor when that happened if she could help it. Dismissing the thought from her mind, Kagome proceeded to take a nap. Something told her she would want as much energy as possible, after all.

Sebastian found it very amusing. Kagome found the trio's antics amusing- at least her laughing or giggling at his stories of recent happenings implies that she does- yet she refuses to be in the manor if they're being left alone. He was looking forward to Ciel's reaction, though. Because Sebastian knew that one way or another, Ciel would find out about Kagome very soon. It would work out quite well for him. It would only mean that Sebastian gets to spend more time with her.

He could still remember how he first met Kagome, around 400 years ago. She had still been searching for jewel shards at the time, and also still wearing clothes from her own time, though she later claimed to have changed what she wears, as her school uniform was so short that even though she could move freely it was a major disadvantage. (He wasn't one to talk, though- he'd been wearing the same suit he wears now even then.) It had been by chance that they met- he'd merely been taking a walk in the evening, when he came across her in a clearing. Curious and holding manners in high regard even then, he inquired as to what she was doing all by herself at such an hour. She'd replied that she had only been enjoying the peace and quiet, and the scenery. She invited him to join her, and he had. For a while, nothing had been said. But then…

Flashback

"Say… have you heard of the shikon no tama?" Kagome had asked.

"Indeed, in fact I've heard rumors that it resurfaced then was shattered. Not that it's any business of mine. I have no interest in such things." Sebastian replied.

And it was true. Those who relied on such things for power or to gain a desire were all either fools or filth, sometimes both, and were often weak and cowardly to boot. Definitely nothing he wanted to be associated with.

"Well then, I suggest a… bargain… of sorts." Kagome proposed.

"You mean you desire a contract?" inquired Sebastian. He needed to be certain of what she meant, after all. She didn't seem to be the type to need or desire his particular skills or line of work. And how did she realize what sort of demon he was?

"Not quite… merely an agreement. You see, I'm the one who shattered the jewel- I was trying to save a child from a crow demon who had stolen it, but was new at archery at the time. To make sure I hit it I attached the crow's foot to the arrow, and as a result the darn thing shattered. Now I'm stuck putting the darn thing back together. The jewel has been nothing but trouble, and only more trouble will come if Naraku, an artificial half demon who's also after the jewel, gets the whole thing. What I propose is this: you be present at the final battle and ensure that my friends don't get killed and that Shippo, the fox demon kit I look after, doesn't even get hurt. In return I'll give you the jewel so that you can feast on the souls trapped inside." she said.

Sebastian rose an eyebrow. This was indeed an odd one. She obviously had no problems with demons, and was well aware that he was of a somewhat unusual nature for even a demon. Yet she didn't care. Nor did she care for the jewel. In fact…

"Why do you seem to hate the jewel? And why the offer? I see little in it for you."

Kagome sighed. "… The jewel is probably why I even met my friends in the first place… but I do. I hate it so much. So many suffer because of the jewel's shards, whether directly or indirectly, and I have no one and nothing to blame but myself because I'm the one who broke it... except for maybe fate. Sango would still have her family and Shippo would still have his father if not for me. I've already figured out that while it's said that the whole jewel is able to grant a wish- any wish- that even if it's true, the price is- or will be- too great to be worth it. Not to mention if it really needs to be a pure wish to be rid of the jewel for good… the cycle will never end."

"What do you mean?" Sebastian inquired.

"With everything I've learned about the jewel, I know three things as facts. One: and can sense, and if it's in my range of sight see the jewel shards. Two: pain, suffering, and horror follows the shards and those after it. Three: supposedly the wish has to be not just any wish but a pure wish to be rid of the jewel. I also realized that everything comes with a price and that there's no such thing as a pure wish." Kagome answered.

"Oh? No such thing?" Sebastian truly was beginning to find her amusing.

"Every wish sprouts from some form and amount of desire, right? So there's no such thing as a truly pure and selfless wish. And I'm not about to be stuck constantly attacked my entire life or existence… whichever comes first." Kagome reasoned.

"Then… why the bargain? Why seek me out and ask for this exchange instead of simply inquire if I would eat the souls when the jewel is whole and be done with it? And why ask me to ensure your friends survive? Surely they can look after themselves; you also seem to be the type to desire to protect them yourself." he normally didn't care, but he really wanted to know.

"That's just it… few demons appreciate or accept charity of their own will. I haven't met you… so I didn't want to risk offending you. And… I'm already training, but with how much they've suffered, because of Naraku and because of the jewel, I'd say that they deserve happiness. Not to mention how late in the game I got my act together and started actually training to be able to defend myself and those I care about. So… I came to you. If you accept our bargain and its repercussions mean giving up a piece of my happiness to ensure that of my loved ones, so be it." Kagome seemed sad… and very determined.

"Well… I can't argue with or deny determination and reasoning like that. Very well. We have a deal." Sebastian said.

He nicked his finger with his teeth (more like fangs) so its tip and his claw was covered in his blood, then drew the symbol he used for his contract on the inside of her hand… where all she had to do to hide it was clench her hands. "This shall be the mark of our contract. When the time comes, call me or send energy into the mark and I'll come."

End flashback

True to her predictions, her actions- from taking responsibility for being the one who shattered the jewel to doing what she could to protect her friends to her bargain with Sebastian had had repercussions. In the final battle, she had called him the first chance she got. He came, and only interfered when one of her friends or comrades was about to be killed or seriously wounded… or an attack was aimed at or headed toward the little fox demon. That was, after all, the terms of the contract. He knew that she wanted her friends safe but didn't request for more than keeping them from dying because she knew they wanted to do this and win of their own accord. No one even realized he was there- except for her. He knew it wasn't just the seal representing the bargain, either.

But then the woman- more like clay pot, she smelled like clay, graveyard soil and ashes with an undertone of what must have been her sent mixed in- stepped in. In her frozen fury she killed two big groups of Naraku's demon horde with only two arrows. Then… it was like time slowed down as Kikyo, her name apparently was, calmly made her way towards Kagome, stating that Kagome had been borrowing her soul long enough and she wanted it back. No one moved. Not even Kagome- she'd later claimed that Kikyo could hate or try to kill her all she wanted, even if Inuyasha hadn't loved her she wouldn't stoop to her level… even if she had no problems with making fun of or insulting Kikyo when Inuyasha wasn't around to start an argument so she refused to lift a finger against her. Sebastian had stepped in, destroying the false body with a single swipe of his current weapon of choice, (releasing the souls and returning Kagome the piece of her soul in the process) stating that he was not allow those under his care die. From there on he played a more noticeable role in protecting her friends.

The repercussions? Naraku died, he cursed her… to outlive all those she held dear, and be unable to see her family again but the results of the jewel and the bargain softened and changed it. Thus turning her into a cat demon of sorts. Also, her first friend in that time- her first true friend she claimed, and almost her crush- now hated her. Sango thought making the bargain was foolish and had been disappointed. Kagome was heartbroken. He helped her get used to her senses and her new forms, teaching her how to appear fully human in the process. Afterwards she went with Lord Sesshomaru to train with the intent to travel and train more when finished. They met briefly from time to time. Then, of course, he made a contract with Ciel, the first in decades and the first that wasn't overly simple, corrupt, or foolish child's play in a couple centuries. Kagome had been in the area, weary of traveling, in need of a break, and bored. She'd been disgusted and indignant at what happened to Ciel so the current arrangement was made.

A few days later, it was time for the close. It had been most entertaining indeed, seeing Ciel react to escaping the trio only to end up with two who annoy him just as much at times- Lau and Madame Red. Jack the Ripper. This was going to be… interesting. It was an unsolved case in the time Kagome was born in. (Supposedly unsolved, anyway. With Ciel on the case, it probably just never got out to the public… maybe even never got to the authorities.) The Undertaker had also been quite entertaining. Kagome would enjoy befriending him… especially since in private he got a bit of Ciel's inner child to come out. Madame Red's scheme to dress Ciel up as a girl was hilarious; though if she ever saw that noble again she would smack him clear into next month. She could not tolerate perverts with no noticeable good qualities. Miroku had been a major pervert, but he had been a good man. Of course, that noble hadn't been Jack the Ripper.

This led to the current situation. Kagome had helped Sebastian investigate, and both had realized two things: first, who said anything about a cult or black magic? Second, all the victims had something in common- each had been a patient of Madame Red, undergoing the same operation- abortion. So Ciel, now being aware of the situation, was standing guard at the entrance to the only route. Apparently, he cared more than he realized. Of course, it had still been a bit of a shock when Madame Red stepped out of the room for the young earl- she was his aunt after all. Then the fight between Sebastian and Grell started. Kagome only watched in amusement… at first.

Kagome jumped down from her perch, transforming into her human form in the process. "Mind if I cut in?" she said by way of greeting.

"Not at all. This reaper is beginning to grate on my nerves." Sebastian said.

"Who are you? And don't interfere with my time with Little Sebast!" Grelle whined.

"At first it was amusing, in spite of my annoyance, seeing how uncomfortable you were making Sebastian. However… that ridiculous Romeo and Juliette line is the last straw. Even if he would consider someone like you, he's already spoken for. So… I would say that this little boy needs to be punished."

At first Kagome just played cat and mouse with him. This lasted for a few minutes. Then all of a sudden she grabbed the safe part of the 'death scythe' blade between her hands.

"Tsk tsk. You're certainly a naughty little boy, aren't you Shinigami-kun? A chain saw isn't a toy, you know. It won't even be invented for a few decades or so. And hasn't you mother ever told you that it's not to take what doesn't belong to you?" Kagome taunted.

"What do you mean 'what doesn't belong to you?'" Grelle asked.

"Simple: you were flirting with my fiancé. So… I would say that you need punishment." she said. With that she purified the scythe between her hands, since she still had unusually pure spirit energy.

Then just when she was ready for the finishing blow, another shinigami came and interfered, saving Grelle. Though Kagome and Sebastian suspected he only saved Grelle because he'd been sent to retrieve him.

Kagome went back to cat form and they returned to the town house. Ciel didn't comment on Kagome the whole way. Once he was relaxing with a snack, however, he spoke up.

"Who and what is she?" Ciel demanded.

"My name is Kagome Higurashi. I was born in the future." Kagome said.

"As for what she is, she once was a human suspected to be the reincarnation of a shrine maiden. The result of an… adventure she ended up on, however, led to her becoming a demon." Sebastian added.

"What were you doing there?" asked Ciel.

"Even if Sebastian hadn't promised entertainment, there was no way that I would stay at the mansion when the trio are unattended."

"Excuse me?" Ciel said.

"I was bored, tired of travelling and appalled by the filth that have the nerve to call themselves humans who led to you meeting Sebastian… so I've been living in the basement. I can start working as a servant if you want. I'm sure Sebastian would appreciate the help."

"Do what you like. I don't care as long as you don't' get in the way."

Later on, Sebastian came up behind Kagome as she was on the roof.

"That was quite the amusing reaction earlier." he said.

She turned her head to look at him. "He thought he could take you away from me. I wasn't about to let that go unpunished."

Sebastian just chuckled and took her into his arms. "You're quite cute when you're jealous." he teased.

Kagome huffed. "Jealous of that? I have nothing against homosexuals, but it was insulting that someone like that thought that they're good enough to take you away from me. And even if I was jealous, you can't say you don't feel the same."

"Yes… I was quite annoyed by all the fools who tried to get you to dance with them. You're mine, and I'm not about to share." Sebastian admitted. Then he kissed her.

Kagome smiled. "Yes… I'm yours, and you're mine- until the end of time and beyond." Then they stayed there, Kagome in Sebastian's arms, watching the stars.

Owari

Yoruko: Hope you enjoyed it. Next up, expect a few oneshots pairing Kagome with guys from Gravitation and Katekyo Hitman Reborn.