A Detective Conan and Kuroshitsuji crossover! I kind of wondered why they didn't have this crossover since Conan and Ciel are sort of alike in some ways (their unusual mature-ness).

This crossover takes place in the sixth Detective Conan movie known as "The Phantom of Baker Street". I of course changed the way things go but basically many rich children are stuck in this mind game (they go into capsules and experience a game which seems so real). And of course Conan and the group get stuck in this as well. They get stuck in this game because a genius computer known as the Noah's Ark took control of the games control and said that if one child does not clear the game, then all of the children will die. So Conan and his group must find the criminal Jack the Ripper to save the children and themselves. But this is really brief since there is a murder behind all this as well. (If you want to know more go watch the movie or read wiki)

I hope u enjoy!

Disclaimer: I do not own detective Conan or kuro!

Conan had a job to do. He had to catch Jack the Ripper or else all the children will die including himself, the children, Haibara, and Ran.

He had to save all of them, but the Noah's Ark had changed the game his own way. And now he was totally unsure what to do. First along with the group, they walked all the way to Bakerstreet but they could not find the character of Sherlock Holmes who should have helped them along the way. So now he was trapped.

"Hey Kid, get going already!" the kid with the red jacket and spiky hair exclaimed. Since they did not know what to do, they were completely stuck. Therefore Conan and the group hid inside an alley as they tried to decide what to do next.

"I'm thinking!" Conan hissed as he placed his hands onto his chin and thought through what should be done next. So they had no helper character which was not something they had expected. Also there were no documents from the previous murders. Simply, they were going nowhere and they did not have much time.

"How can we find the Jack the Ripper with no documents and no help?" Ayumi whispered as she tightened her grip on Conan's coat which was wrapped around her.

"I really don't know… but for now I think we should stay low and walk around to find some clu-…"

"My, my young master… It may seem that we have found some people who do not belong in this world…"

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Outside the game

"I will tell you people in the control room but in the game of catching Jack the Ripper, I had placed some characters whom really existed…" the Noah's Ark stated only in the control room where Professor Agasa, Mouri, Yusaku Kudo and the officers stayed to watch over the children.

"Whatever do you mean Noah's Ark?" Professor Agasa asked into the microphone which connected to the highly intelligent computer.

"I know the real Jack the Ripper. It's not some sort of fantasy which people created from the Jack the Ripper's case. No, it's all real. And those two people who solved the case will be in this game…"

"Solved the case?" Yusaku echoed as he frowned slightly. "But the Jack the Ripper case was never solved, in the end Jack was never caught."

A mechanical rumble that sounded like a chuckle erupted through the room. "This is why you people are so bothersome… Of course Jack the Ripper was caught but the solution to the case was not revealed. Only a few people know the truth behind the Jack the Ripper's case and the children will meet those people…"

The whole room stilled from shock of Noah's Ark's words. All of them simply couldn't believe it, the real truth behind the Jack the Ripper's case?

"And I believe the children will meet them soon. The queen's faithful watchdog and his butler…"

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"My, my young master… It may seem that we have found some people who do not belong in this world…" a voice called out from above them which caused all the group members to freeze.

"It may seem that you are right Sebastian. So these are the people whom you have found suspicious when you were searching for people's alibis?" another voice asked. And by then all the group members looked up to find a tall shadow holding another figure stand at the rooftops. Conan narrowed his eyes at the figure or figures to judge whether they were a threat or not.

"Conan-kun! Stand back!" Ran shouted as she stepped in front of the children and got ready to attack the intruders.

"Ran-neechan…" but it was already too late to run as the shadow landed in front of them with inhuman grace. Conan gritted his teeth as they heard the figure's footsteps approach them with a steady rhythm. They were officially trapped.

"Yes I am sure they were…" the first voice answered with a slight tone of sarcasm hidden beneath the words.

"What do you want?" Ran hissed as she crouched into a ready position to fight the figure. And Conan furiously looked around the alley to find an escape route so that Ran wouldn't be risked getting hurt while Ayumi clutched onto Conan's sleeves fearfully.

"Y-yea…" Genta stuttered out, "W-what d-do you want w-with us?"

"What do I want with you?" the second voice called out as the clouds parted to let the moonlight sweep through the alley to reveal two figures. One was a very handsome man with longish jet black hair. He wore a nicely tailored suit which a butler might wear and the man's eyes were an unusual shade of dark crimson. The second figure who was carried in the man's arms was a beautiful boy. The boy had grayish-blue locks which framed his feminine face. He wore a black coat with a large ribbon which covered his whole body. The boy's one midnight blue eye glared at the group as his right eye was covered with an eye-patch.

Suddenly the boy sighed which caused the whole group to flinch, "Sebastian, will you put me down?"

"Of course young master, just that you are quite weak… I mean fragile therefore I believe it was best to hold you" the man replied with a smirk as he gently placed the boy down onto his feet.

A few grumbles were heard from the boy before he looked up defiantly towards the group and demanded, "You were talking about Jack the Ripper few seconds ago. Do you people know anything about the case?"

Conan studied the two figures before them, wondering who the heck they were. He listed through all the stories of Sherlock Holmes but could not find any of the cases from the Sherlock Holmes novels connected to the two strangers before him. He remembered how some street urchins had helped Holmes solve some cases but the boy before him obviously looked like someone from the higher class. Also how the boy presented himself was not how a normal child will act and the boy looked barely older than the children.

And when no one answered his question, the boy narrowed his one cerulean eye at them. Then the boy spoke up to the man behind him, "Are they the same as you?"

"No young master…" the man replied as his smirk widened, "They are like you, young master."

"I see…but you said they do not belong in this world."

Suddenly Conan had a bad feeling, and whenever he had bad feelings they needed to leave, fast.

"Yes I did young master, after all I never lie…like humans."

"W-we don't know any-anything, so ple-please leave us alone!" Mitsuhiko shouted as his whole body shook in fear.

"Kudo-kun" Haibara whispered towards Conan so that no one can hear. "I think these people are dangerous, especially that man. We better leave fast."

"I know…" Conan hissed back as his eyes darted towards the entrance. Then his eyes met with the man's strange colored crimson eyes which seemed pierce into his very soul. Then the man gave Conan a mischievous smirk which caused Conan's heart to leap from fear. Yes, the man was definitely dangerous.

"You are right Sebastian…" the boy said nonchalantly which seemed unfit in such a situation. "You never lie but these people do."

Then the boy turned towards the man and said in a powerful voice which sounded so strange from a child so small, "You know what to do right, Sebastian?"

"Yes my lord…"

Then everything fell black before them.