Title: Fiamma: The Assassin

Summary: Every assassin have their own rules, yet all follows one golden rule: Never get emotionally involved with your target. Fiamma knows this. Yet, meeting that person, he can't help but break the most important rule of all…

Disclaimer: Katekyo Hitman Reborn! belongs to Akira Amano

Pairing: Eventual G27

Warnings: AU

Fiamma: The Assassin

Prologue

"…Argh!"

"What's going on?!"

"Get the medics, quick!"

"The food! What are you trying to do to us?!"

"I did nothing of the sorts, I assure you."

"Liar!"

"Hurry up and help him!"

"Hehehe… Hahaha!"

"Who's there?!"

"Mission: Eliminate Cassa Famiglia Boss. Mission Status: Complete. Arrivederci, everyone. Have a good night."

"That mark…!"

"It's him! It's Fiamma!"

"Boss! Boss! Boss!"

"Another boss got killed?"

"Yeah. You should be careful, Giotto."

"G, I'll be fine."

A blond man sat at a mahogany desk, piles of paper stacked on the table. He wore a black stripped suit with a long black cloak held together by two golden chains. Azure eyes narrowed in worry as he stared at the report set on his table. Right beside him, a tall, red-haired man stood with his arms crossed. The right side of his face was covered with a red-colored intricate tattoo, while rose colored hair framed his face. A cigarette hung from his mouth unlighted. Like the blond man, a frown was etched onto his face. He let out a sigh, and ran a hand through his hair.

"You know as well as I do how many people are after your life." The red-haired man, G, spoke.

The blond, Giotto, smiled. "I don't have to worry with you watching my back, G."

"You make me sound like a babysitter." G growled.

"You act like one." Giotto pointed out. "Although… No babysitter I know smokes." Giotto frowned.

"I'm not smoking." G replied.

"That cancer-causing stick is still in your mouth." Giotto pointed out. He sighed in defeat as the other smirked and made no move to remove said stick from his mouth. "In any case, enlighten me about the Cassa Famiglia Boss murder."

"Assassination." G corrected. "According to sources, it was carried out by the famous assassin, Fiamma."

"Famous?" Giotto raised an eyebrow.

"Rumor has it that this guy has never, ever failed in his assassination missions. And it doesn't matter who the target is either." G explained. "He's also one of the top assassins in the business."

Giotto frowned. He knew by that statement that Fiamma killed anyone requested, even women or children. "They're sure this assassination is his… handy work?" Giotto asked.

G nodded. "Fiamma has a few methods of carrying out his mission, but apparently, his favorite is by poison. The Cassa Famiglia Boss died by poisoning."

"Doesn't mean it's Fiamma's work." Giotto pointed out. "What about Poison Scorpion Bianchi?"

G shook his head. "Definitely his work." G replied. "He uses a very unique poison. It's very lethal, and causes vital organs to self-destruct. The victim then dies from excessive internal bleeding. Not the kind that Poison Scorpion uses."

Giotto winced. "What else? That doesn't seem to be the end of it."

"You're right about that." G sighed. "There's apparently no cure for the poison. But the strange thing is; there's variation in how long it takes for the victims to die. According to reports, some take up to few hours to die, but some took less than thirty minutes to die. And it's reported that they definitely died of the same poison."

"Could be the dosage." Giotto suggested.

"Nope. Same amount found after investigations." G corrected.

"This assassin is full of mysteries then." Giotto said.

"And dangerous." G added. "I'll send out notices to the Family. Get them to be more alert."

"…Vongola is getting a little big, huh." Giotto said after a moment, his eyes on the document before him.

"Giotto… You're going to handle it fine." G assured.

Giotto smiled weakly. "Thanks, G."

"Now… You really need to start on that stack of paperwork if you want to reach your bed tonight." G said, snickering.

"…I hate you so much, G."

A figure yawned and stretched on the bed. Chocolate brown eyes blinked to clear the sleep from his eyes as a hand ran through the messy brown locks. He turned to the clock.

'…It's past noon… Damn.'

The covers flew off the bed and the man stumbled out. He rushed to wash up and took a quick shower before dressing in pair of black slacks and an orange jacket. The twenty-four year old attempted to fix his hair as best as he could one last time before running out of his room. He ran through the familiar hallways, nodding to people who greeted him along the way. Finally, he reached his destination, throwing the door open violently.

"You're late, Tsunayoshi."

It took the brunette everything not to shiver at the voice. It took him even more to keep his voice steady and firm.

"My deepest apologies, Master." Tsunayoshi spoke, bowing slightly.

'Master' smiled. It sent a shiver down Tsunayoshi's spine, though the brunette hid it well. "How was the job last night?"

"Mission completed." Tsunayoshi replied dutifully.

"And I suppose it was because of the job last night that you're late?" 'Master' asked. Tsunayoshi nodded quickly. "Very well. I shall forgive you this time then. Sit down and have your lunch."

"Thank you, Master." Tsunayoshi bowed.

He took a seat at the opposite end of the dining table and motioned for a servant to bring his lunch. Although others sitting near him tried talking to him, Tsunayoshi ignored it all momentarily and concentrated on his food. He wanted to get out of the room quickly –to get away from his 'Master' –Byakuran. Tsuna nearly wolfed down his food and got out of the room.

Unfortunately, he didn't get out before Byakuran called him.

"Oh, Tsunayoshi…?" Byakuran called in a sing-song voice.

"…Yes, Master?" Tsunayoshi forced himself to answer.

"I have another job for you. You wouldn't mind seeing me later, would you…?"

Tsunayoshi swallowed.

"No. Not at all."

A/N: Hey peeps! I'm back with another KHR fic. This time, it's a multi-chapter! Now, I realize this is really short, but this is just the prologue. The next chapter onwards will be longer in length. Some tidbits about this fic:

First of all, this is an AU story.

As you can tell, in this story, Tsuna is an assassin; a very strong one. His title, Fiamma, means 'little fiery one' or simply, 'flame'. My apologies for the unoriginality.

This fic is set in Italy, so unless otherwise stated, the dialogues are actually all in Italian. The only Japanese here are probably only the names.

Time-wise, this is technically set in canon!Primo's time (which I usually take to be around 400 years before canon!KHR's setting), but the technology will not match the time era. The major clashes will be the presence of motorcycles and mobile phones/cellphones.

And now, to make up for this very short prologue, a preview of the next chapter:

"Infiltrate Vongola and conduct an investigation. After sufficient information is found, eliminate Giotto di Vongola."

"I understand, Master."

...

"Another job, Sawada Tsunayoshi?"

"How long is the mission, Tsuna?"

"The top assassin of Gesso Famiglia is not to carry out an assassination. How ridiculous."

"Is it… dangerous, Tsunayoshi-nii?"

"Idiot. We're assassins. All our jobs are dangerous."

"We're the best anyway. This should be a breeze. Right, Sawada?"

...

"Good luck, Tsunayoshi."

"…Thank you, Master. I will do my best."

A/N: Well. I have written many KHR one-shots, but this is my first multi-chap. I really hope you guys enjoy this! Thank you for reading as always~