Ben 10 and Katekyo Hitman Reborn! do not belong to me.

Well here is my first project. Now its kinda lame since I have two non-fanfiction books I am writing to worry about. But it will eventually get better (I hope).

Enjoy!

Benjamin Kirby Tennyson, wielder of the Omnitrix and savior of many worlds. A legend between legends and a hero between heroes. He has faced the most dangerous enemies and situations, but right now, all he wanted to know, is…

"Where am I?"

Asked Ben, as he felt a strong white light burning his face.

"Shut up, I ask the questions"

Ben never heard this voice before, it sounded like a little kid repeating stuff he saw on TV.

Finally the light went away and Ben saw a light fixture being turned off by… a baby?

Ben was completely confused, what was a baby doing there? However the weirdest was his clothes, he was wearing a kind of fedora, Ben was not sure what its name was, he just remembered hearing it in mafia movies. The hat had a very thick orange line around the sides and he was wearing a black suit. He had black eyes and sideburns very thin and long that somehow ended in spirals. Under the fedora he could see spiky black hair and on the sides of it a little creature that looked like a chameleon, only more cartoonlike.

"Who are you? What you did to Tsuna?"

He approached and Ben noticed not only how big his head was, but also an all yellow pacifier in his neck.

"Who… who are you? I don't know of any Tsuna, are you playing with me little baby?"

Ben felt a strong force hit him in the cheek that made his face turn to his left. Only after turning it back he saw the baby with his left leg stretched and in midair.

"Ouch! Did you just kick me?"

*thump*

Ben tried to move only to finally look at himself and notice that he was tied with ropes in a chair.

"Lambo-san wants to hit him too!"

"Shut up stupid cow!"

"What should we do with him Reborn?"

Ben turned his head to the right side and saw three people standing there, a guy that looked like a teenager delinquent, with a gray almost white hair, that went down on both sides of his head. He had an angry look that was very obviously aimed at Ben, however from time to time he shifted it to look at the little kid at his side. A little kid not unlike the baby interrogating him but with a more childlike face, he had very big puffy black hair, like an afro, and on the sides of it were two horns that looked like it were made of metal, he was also wearing a cow styled (white with black spots) one piece that covered his entire body, even the hands and feet. Next to him was a very older woman, around twenties or something, she had protection goggles resting on top of her head and a big scar that covered her entire cheek, her arms were folded and she had a really serious look.

Reborn couldn't help but feel confused about this situation; he wakes up just to find that Tsuna who was sleeping next to him was substituted by a taller teenager with brown hair and a green jacket. All too weird, mainly the unique dispositive in his wrist, Reborn didn't had a clue about what it does, it could even be a toy, but he wouldn't take risks, so it was wrapped with rope much like the rest of his body.

What Ben sadly discovered after trying reaching for it.

"I can't take it anymore!"

Said the silver haired teenager while unfolding his arms and growling angrily at Ben.

He approaches the chair Ben is wrapped and reaches for his pocket to take…

Dynamite?!

"Where is Tenth?! If you did something to him I'll kill you!"

Ben instinctively tries to move away from this psycho just to fall on his back for forgetting where he is. He is brought back up and notices that it was by that woman with the huge scar in her face.

"Stay away from him Gokudera, its Reborn who is handling this situation"

"But... Tenth…"

"Calm down Gokudera, I think he has no idea of what is happening"

"How?! He kidnapped Tenth!"

"I didn't do anything!" Ben anger finally surpasses his initial fear of the unknown.

"I don't know nothing about this 'Tsuna' or 'Tenth'. I was just sleeping in my bed in Bellwood and woke up here"

"Bellwood?" Says the woman with a confused yet curious face.

"It's where I live. We aren't there now?"

"We are in Namimori"

"Namimori? Never heard of that city in the USA"

The baby (that was probably called Reborn) shares a confused look with the woman and the teenager named Gokudera 'really what is up with these names?' before looking back at Ben.

"Here is Japan"

Ben was left completely speechless, he was in Japan? Of course he had visited other countries, even other planets, but to wake up so far from home… What happened?

"Maybe you are right Reborn, he seems too stupid and weak to kidnap Tenth"

"Hey!" Ben looks angrily at Gokudera, he felt like he was arguing with Kevin.

"Lal Mirch"

Said the baby probably referring to the woman.

"Untie him"

"What? But… And if he tries to escape?"

"Don't worry about it. I can't sense any flames coming from him, so he must be weaker than all of us"

"And what about that little shit in his arm?"

Gokudera really wasn't causing the best of impressions in Ben.

"I played with it a little before. I couldn't figure out what it does but right now he can't touch it so won't be any problem. However keep an eye on him"

"Roger"

"With pleasure"

"Lambo-san will kill him if he tries to escape mwahahahaha!"

Somehow Ben didn't feel safe.

Lal Mirch untied the ropes and gave Ben distance after taking a good look at him.

"Look, I know you must be worried about this 'Tsuna' and I don't want to cause any trouble but I really don't know what is happening"

"He is telling the truth"

Everyone attention turned behind to see a black haired man wearing a black suit with a purple shirt, visible behind the tie.

"How do you know that?"

Gokudera looked angrily at him, obviously another person he didn't like.

"Small animals can pull good tricks when in a pinch, but he keeps repeating the same thing like he is stupid"

Okay. Ben was just conformed that in the place he was, no one liked him.

"Will you help?"

Reborn said, more like a challenge than a question.

"I don't like crowds, and the herbivore is the only small animal worth biting to death"

Ben didn't understand a thing, but for the side glance he received he feel it must be related to that Tsuna guy.

They walked him to a bigger room that Ben recognized as being a kitchen. In the oven there were two teenage girls, one had short brown hair and a beautiful smile. The other had long black hair tied in a ponytail and was regulating the fire.

"Oh so this is our guest?"

Said the short haired one while she closed her eyes and her smile got even wider.

"My name is Kyoko, it's a pleasure to meet you"

"The pleasure is mine"

Is all Ben managed to say since he was a little thrown off guard by she bowing to him. Ben somehow remembered it was a Japanese thing.

"And I am Haru, good to meet you - hahi!"

Ben had no idea what the heck was that, but again could just be Japanese stuff.

Ben sat on the table like instructed by Reborn and noticed Gokudera was not there anymore.

"Where is Gokudera?"

"He has his own things to do"

Ben wanted to ask more, but he knew better than to get involved with them.

"Anyway, where am I? I can't see any windows here. Is this also a Japanese thing?"

Lal Mirch glanced at Reborn and after his nodding she started to talk.

"This place is underground"

"I see. Why is such a unique 'family' living underground?"

"It's because we are mafia"

Said a teenager, with a baseball bat, coming in his direction. He was tall, had messy black hair and was somehow smiling even more than Kyoko. Maybe not everyone hated Ben after all. Then ben just realized what he heard.

"Wait. Mafia?!"

"You shouldn't tell everyone our secrets Yamamoto, especially intruders"

Lal Mirch glared at him with a harsh look but Yamamoto smile didn't give a hint of disappearing.

"It's okay. It's just a game"

"Here is the food!"

The girls brought four plates and placed them in front of each person, Ben could recognize rice in it and some orange and white food that he found familiar, maybe fish. He took a bite and smiled a little.

"It's really good"

"Thank you"

The girls left the kitchen after thanking Ben. He had to admit it was better than anything Grandpa Max had ever tried to push on him.

"Now that the girls are gone…"

Reborn voice suddenly became deeper and Ben felt the mood changing.

"…who are you?"

Ben took a big gulp and seeing no other way decided to be honest, because his fame would have obviously reached even Japan.

"I am Ben Tennyson. Wielder of the Omnitrix and savior of the universe"

"I never heard of you" Somehow Yamamoto constantly smiling only made this sound harsher.

"Omnitrix, is the thing in your pulse?"

Reborn pointed to Ben's hand that was wrapped in ropes.

"Yes, it allows me to turn into different aliens"

Everyone was a little thrown off guard by this, it was Yamamoto who broke the silence.

"Cool! Can I see it?"

"Show us" Reborn sounded anything but gentle.

"O-okay"

Ben rotated the round part on the top of his clock and after finding the hologram of the alien he wanted, smashed it down.

"Jetray!"

Everyone stared in amazement after seeing the teenage boy be replaced by a red stingray with yellow horns that could somehow fly.

"Wow. That is really cool"

"Thanks"

Jetray attention was shifted when he saw Reborn pointing a gun at him, he hadn't the time to ask what he was doing or looking if it was a toy as Reborn shoot him obviously aiming at the head. Jetray quickly flied to the side making the bullet hit the wall behind him. He was about to question Reborn when he saw that the point hit by him had just a red spot.

"A… Paint ball?"

"I wanted to confirm it"

"What?"

"If you were really a hero like you said you were or just a brat lying to gain our trust"

"And…"

"You half passed, you got outta the way instead of just putting your arms in front of the body like a coward, but you didn't strike me back" Reborn appeared to took a deep breath before speaking again "Only running and with no bloodlust, you kinda remind me of him"

"Tsuna?"

"Exactly"

"Who is this guy? What is this whole mafia deal? Who are you guys?"

"We will say, now please sit down"

Ben don't understood first, but he noticed that staying in the air in a mysterious creature body probably wasn't the best way to gain their trust. He transformed back and sat on the chair.

"It all started with the Vongola…"

Tsuna was rubbing his head as slowly opening his eyes as he woke up, he was a little surprised that Reborn didn't make him get outta bed with a kick or something like that till that moment.

"Are you still sleeping Reborn?" Tsuna said as he yawned and got up from bed. His yawn was abruptly cut when he saw that not only Reborn was nowhere to be seen, but he had no idea where he was.

"Wh-where am I? What is this room?"

He got out his hysteria when sunlight struck him in the face through the window.

"Sun? Aren't we supposed to be underground?"

"Ben. Honey, are you ok?"

Tsuna heard a voice coming from behind the door. Scared he hid under the bed when saw the doorknob moving.

"Ben?"

The blonde woman calling that 'Ben' got surprised after seeing the room empty. She turned her head and spoke louder to behind.

"Carl. Has Ben gone out already?"

"I don't know, didn't saw him. Maybe went to save the world or something like that"

"Yeah. That should be it"

She closes the door and Tsuna sighed realizing he was holding his breath this entire time. He goes to the writing desk and see a notebook, he open to look at the name of the owner. The same name that woman was calling.

"Who is this guy, Benjamin Kirby Tennyson?"

Well, this was the first chapter. I hope you liked it ^^

As you can see I am not that good at English, since I am Brazilian and all. So I am considering finding someone who can help me with it, just cleaning the English errors and such. If you have interest tell me in the reviews. Of course you also gain credit for the story!

About the story its a little brute right now, even though I am writing books I am still a beginner and often the hardest part is to handle the conversation when there are more than two people in the same place. Finding out how the characters will react is harsh too, but I will get better eventually.