Ciaossu! WhiteAngel128 here with another fanfic. Ah, it's good to be back. :) This idea came to me when one of my friends asked me to help her write a crime-themed story for English class. Took me awhile to get everything sorted, but at last, here it is. Well, I don't think there's anything else I need to say at the moment, so I'll leave you to enjoy the story!

Summary: In order to solve a serial murder case, Chief of police, Sawada Tsunayoshi, must go undercover…as a Mafioso. He soon finds out he's in for way more than he'd bargained for. AU G2718

Pairing(s): G27, 1827, slight 6927. Might even turn into All27, can't help it, Tsuna's too cute.

Warnings: Shonen ai, malexmale, language (thanks to certain people).

Disclaimer: After buying a whole lot of KHR merchandises, I'm broke. Hence, there's no way I can own the amazing Katekyo Hitman Reborn.

Italics = Thoughts, also emphasis at times.

Chapter 1

Inside one small office of Namimori police force, behind a desk stacked with columns after columns of documents, was Sawada Tsunayoshi, furiously scanning through and signing papers after papers. He'd been doing this for god knows how long. How could there be so much paperwork, especially when he was the Chief of police of a peaceful town like Namimori?! This definitely had something to do with his ex-home tutor, yet still very Spartan and sadistic, Reborn!

Speaking of the devil, the brunet peeked over the top of a paper around the room, he was nowhere in sight. Good. Tsuna let out a relieved sigh and lowered the document back onto the desk. Since Reborn was not here, might as well take a rest. Deciding to take the chance, Tsuna immediately slumped against the desk, resting his head on his arms. Before he could even count to ten, a small 'click' was heard and a cold object was pressed against his head.

"Sleeping on the job, Dame-Tsuna? You've got guts." A familiar suave voice asked.

Tsuna groaned and reluctantly returned to a sitting position while cursing Reborn and his ability to appear out of thin air. He glared – more like pout to the other's eyes – at the man. "Come on, Reborn! Can't you let me rest for a few minutes? I've been doing this since morning! You didn't even let me eat breakfast!"

"If you still have enough energy to whine, get back to work. Hurry up, before I let you eat lead." Reborn moved the gun to in front of Tsuna's mouth for emphasis.

The brunet let out a shriek and immidiately started signing the papers like his life depended on it, which it did. Reborn smirked in satisfaction, his gun changed back into Leon, the green chameleon, and moved to the sofa against the wall to resume drinking his espresso. After finishing the entire cup, he decided to go check on the other members of the force. "Dame-Tsuna, remember, slack off before finishing your work and you'll die." Letting the threat hang in the air, the older man adjusted his black fedora and left the room, making sure to lock the door behind him.

Knowing he wouldn't be able to leave anytime soon, Tsuna tried to focus on his work, but failed miserably. Paperwork can be incredibly boring, especially when you've been stuck in an office reading them for hours without rest. In order to keep himself awake, Tsuna let his thoughts wander – while still occasionally scribbling – to how on Earth did he ended up here doing this job.

The beginning would probably be when Reborn showed up at his doorstep eight years ago when he was in the first year of middle school, saying that he was an acquaintance of his father from Italy and his new home tutor. Back then, he was nicknamed 'Dame-Tsuna' – though Reborn still called him that – since he was pretty much useless at everything. So throughout his remaining school years, the older man had 'tutored' Tsuna using methods that can only described as insane tortures. Even though Tsuna's physical strength improved exponentially from Reborn's teaching, he still only managed barely passing grades for his studies. It was then that his home tutor suggested joining the police force. The job did sound quite appealing, and all Tsuna really wanted was a steady job anyway, so he agreed.

To Tsuna's surprise, he got the job quite easily at the age of 20. And then, he managed to move from recruit to Chief in just a matter of two years. He suspected that a certain tutor had been pulling the strings since such achievement should not be possible. The surprises kept on coming, the people in his team were seven of his friends, classmates and seniors from high school. Again, definitely had something to do with Reborn. The man did mention something about them being 'the perfect comrades to protect him'. So who were these seven people? Let's see, in chronological order of Tsuna meeting them: Yamamoto Takeshi, Gokudera Hayato, Lambo, Sasagawa Ryohei, Hibari Kyouya, Rokudo Mukuro and Dokuro Chrome.

Yamamoto was Tsuna's first friend, the two stayed this way throughout high school and ended up working together by coincidence – or that was what the former thought. Gokudera was a transfer student from Italy and Lambo was an acquaintance of Reborn's. The latter somehow ended up becoming a freeloader at Tsuna's house and remained there until now. As for Gokudera, the two started off on the wrong foot due to the silver-haired man's delinquent-like attitude, but that changed when Tsuna saved his life out of pure kindness.

From that moment, Gokudera sworn eternal loyalty to him and started calling him 'Juudaime' because the brunet was the tenth person he respected – and also the most ever since. When Tsuna decided on his future career, Gokudera had made it his goal in life to be Juudaime's right-hand man. Ryohei was the older brother of Tsuna's first crush and also his senior, they didn't have much to do with each other until the older man was impressed by his fighting skills and became obsessed with recruiting him into the boxing club, but Tsuna turned down the offer each and every time. Why he was there working with him? Well, that would be a question for Reborn to answer. The same could be said about Lambo.

The last two seniors, Hibari and Mukuro, approached him for pretty much the same reason. They saw Tsuna in middle of one of Reborn's training sessions one day and found him 'interesting', strength-wise and personality-wise. Reborn, being the sadist that he was, suggested to them to become Tsuna's sparring partners and they gladly accepted the offer. Even now, he still has to fight the skylark at least twice a week, Mukuro still stuck around because of his strange fascination with Tsuna. And finally, Chrome. She was the timid younger sister of Mukuro who would follow her brother anywhere without a second thought so her reason for being in this team was self-explanatory. Reborn also chose to stay with Tsuna as his advisor. The latter didn't mind that as much since he really didn't think he could handle the job alone. Ironically, Reborn was actually a hitman prior to becoming his tutor, and now he worked with the police.

Tsuna snapped out of his daydream as the doorknob was turned and Reborn reentered. He prayed to every god he knew of that the latter hadn't caught him, he really did not want to die at the age of 22. Reborn eyed the amount of work the brunet had completed while he was gone – which was three pages – and turned to him. Tsuna flinched and shut his eyes, waiting for a gunshot or a hit. Seconds passed, and he was still unhurt.

"I could kill you now, but that will only hinder the investigation." Reborn stated and flicked his student's forehead.

"H-huh? What investigation?"

"Get your stuff, Dame-Tsuna, we have a case. Hibari and Chrome are already at the scene and Gokudera's waiting outside with Yamamoto and Mukuro."

"Oh." Tsuna grabbed the blazer behind him and put it on while trying to hide his excitement. He knew it was very wrong to be eager like this, but hardly anything exciting ever happened in Namimori. Plus, anything was better than paperwork.

The two exited the room and walked towards the entrance, with Tsuna struggling to keep up with Reborn's fast pace. Out of genuine curiosity, he asked the taller man, "So, what's the case about?"

"Don't know, Hibari didn't give away much information."

Tsuna sweat-dropped, that didn't come as much of a surprise – Hibari wasn't exactly the most talkative person there was. "I guess we'll just see when we get there then." As they stepped out of the building, there was already a standard five-seated police car waiting not too far from the entrance. They did have other vehicles at their disposal, one of which was Reborn's sport car, but God forbid a single scratch ever got on that thing, or there would be hell to pay.

When the pair got closer to the car, a silver-haired man perked up at the sight of his boss, got rid of the cigarette in his mouth and ran over to greet him. "Good afternoon, Juudaime!" With that said, Gokudera gave him a respectful ninety-degree bow as usual.

Tsuna raised an eyebrow, did he just say 'afternoon'? He finally glanced at his watch, the digital numbers informed that it was 1:40 PM. Damn Reborn for locking him up for 5 hours. "Good afternoon, Gokudera-kun." The brunet greeted with a smile. He also waved back at Yamamoto and nodded at Mukuro, both were leaning against the car behind Gokudera.

"Juudaime, thank you for your hard work since this morning. I wanted to help you, but Reborn-san said that would get in the way of your training," Tsuna twitched and cursed Reborn again. Behind him, said man cleared his throat and Tsuna jumped. He'd totally forgotten about Reborn's ability to read people's - especially his - thoughts. "And Juudaime, I know you probably hadn't had a chance to eat anything, so I took the liberty to get you some food." Gokudera added, effectively bringing Tsuna's attention back to him – or rather, what he was holding. His face lit up, in the other's hands were the most delicious-looking sandwich ever.

"Oh God, Gokudera-kun, thank you so much!"Tsuna gratefully accepted the sandwich and eagerly took a bite out of it.

"I'm glad you like it, Juudaime." The silveret grinned enthusiastically and watched as his beloved boss golfed down his first meal for the day.

"Yo, Tsuna! You can eat on the way, we need to go now. Hibari's probably getting impatient." A tall black-haired man reminded as he walked to them and stood next to Gokudera. At the sight of the newcomer, Gokudera's attitude changed immediately. A frown appeared on his face and he growled.

"Baseball freak, don't interrupt Juudaime's meal!" Gokudera yelled and glared menacingly, but the other just laughed and shrugged it off like usual.

"It's OK, Gokudera-kun. Yamamoto has a point, Hibari-san will bite us to death for keeping him waiting. Let's go." Tsuna – who'd finished his sandwich in record speed - put a stop to his friends' one-sided fight and nudged the two to head towards the car. By that time, Reborn had already left the trio and settled into the seat beside the driver's.

Gokudera nodded in acknowledgment to the brunet and ran ahead to open the car's door, only to have a dark blue, pineapple-haired male beat him to it. The latter sent a smirk to Tsuna's self-proclaimed right-hand man before focusing on Tsuna himself. "Good afternoon, Tsunayoshi-kun," he greeted, ignoring Gokudera's complaints. "I haven't seen you in a while."

"Hello, Mukuro…and I believe I'd just seen you this morning when you handed in your reports." Which equaled to more work to my already-ridiculous workload. Tsuna added silently in his mind.

"Oya, which means it's been hours, that's way too long."

"Mukuro, just get in the car so we can go. I really don't want to be bitten to death by Hibari-san."

"Kufufufu, you're awfully cold today," Mukuro chuckled, but complied with Tsuna's request and moved aside. "After you, Tsunayoshi-kun."

The young Chief sighed and finally got into the vehicle with Mukuro following behind. Much to his dismay, Yamamoto has taken a window seat on the far end, meaning he was stuck in the middle. The only problem with that was Mukuro's lack of respect for personal space – especially when it came to Tsuna's. Said man was obviously aware of his predicament as he let out more amused chuckles. Without much of a choice, Tsuna took his seat between the two other males. Once everyone was in the car, Gokudera started the engines and the team finally departed, heading for the newest crime scene.

Their destination was relatively close, but the peak-time traffic was simply horrible. Even with Gokudera's dangerously fast driving, the trip still took a good forty minutes. During that time, the car was filled with the usual chatters. And 'usual' in this team of Namimori police officers' case meant Gokudera yelling and cursing about traffic jams and speeding devils (though he was also one), Yamamoto trying to calm the silveret down (which resulted in more yelling) and Mukuro's teasing accompanied by quite inappropriate touches towards a certain Chief – again, even more yelling from Gokudera. Tsuna inwardly groaned, he could feel his excitement from earlier dissipating into thin air and a migraine from hell forming in its place. These were one of the times where he wished his friends weren't so loud and energetic.

When they finally arrived there and he'd gotten out of the car, Tsuna wanted nothing more than to get on his knees and kiss the ground, but Reborn would most likely kill him for "looking so pathetic" in public. So the brunet decided to take the next best option, which was taking a deep breath before scanning the location. They were parked outside an average-looking apartment complex in a quiet neighborhood. The place didn't look like the safest there was, but it wasn't too shabby either. On the third story, second apartment from the right, stood some police officers and yellow tape hung around the area. Tsuna adjusted his tie as he headed for the apartment with his subordinates – though he preferred to think of them as friends – trailing behind.

Once they'd reached the room, the lower-ranked officers saluted to their Chief and opened the door for him. Tsuna gave them a faint smile and a nod before entering the crime scene. The room was relatively small, probably only enough for one person, and most spaces were occupied by the basic furniture. The forensic team was already at the scene, examining the body that was lying just right beside the two-seated sofa, searching for evidence and dusting for fingerprints. Tsuna and company moved over to take a look at the body first. The victim this time was a tall man in his mid-thirties, his physical features suggested a foreigner – possibly European. Before Tsuna can take note of anything else, footsteps were heard and a man now stood beside him. The brunet looked up to see who it was, and flinched when he was met with piercing blue-gray eyes of Hibari Kyouya.

"You are all very late," the familiar cold and deep voice stated before the skylark pulled out his tonfas from wherever they were hidden before. "Sawada Tsunayoshi, since you are the boss, shall I bite you to death?"

Tsuna held up a hand to prevent Gokudera from snapping back and stuttered, "S-sorry, Hibari-san, but we had some delay because of the traffic. And please don't bite me or anyone else to death, we have work to do, right?"

Hibari considered that for a moment before agreeing and withdrawing his tonfas. "Hn, Tetsu will explain the case to you." After saying that, the raven moved back to the furthest spot in the room where he could observe everything without being crowded by herbivores. As if right on cue, a largely-built man with an absurd hairdo by the name of Kusakabe Tetsuya took the place of his boss.

"Sawada-san," Kusakabe bowed in greeting. "As you can see, the victim is a man named Bernardo Russo. And yes, he is a foreigner, Italian to be exact. Russo-san was a businessman in Sicily who'd moved to Japan nearly a year ago. According to his neighbor, Nagata Rika, he lived alone while occasionally contacting his family in Italy. She was also the one who reported to us when she came here to give Russo-san some extra food and found the body by chance two hours ago. She'd mentioned that Russo-san could be away from home for quite long periods at times for business trips. That's about all we got from the interrogation. As for the autopsy, Dokuro-san – who arrived twenty minutes earlier than you – is doing it now with Rokudo-san. And I believe they're just about done." Kusakabe turned his head towards where the siblings and the forensic team were.

Tsuna raised an eyebrow, he hadn't even notice Mukuro detaching from the group. Putting that aside, he turned back to Hibari's subordinate. "Thank you for your hard work, Kusakabe-san. We'll take it from here." Said man saluted in response and moved to take his place next to Hibari.

"Juudaime, let's go see the pineapple bastard and his sister." Gokudera suggested, not caring that he'd just addressed Mukuro with the forbidden 'p' word.

Tsuna gulped and waited for the telltale twitch from the blue-haired male, but there was none – Mukuro was preoccupied by his conversation with Chrome. "Yeah, let's go, they probably have a good idea on the cause of death by now."

"Hey, Tsuna, don't you think it's strange that the victim lived here?" Yamamoto asked as the four walked towards Mukuro and Chrome.

"Huh? Why is that?" Tsuna stopped on his track and turned to his friend. Yamamoto was about to reply, but Reborn got to it first.

"Dame-Tsuna, be more aware of your surroundings. Look around you."

Tsuna did as told and realized what the two was talking about. The furniture actually looked to be expensive, the TV had to be at least 50 inch, even the photos hanging on the wall were framed with high quality wood. "Now that you mention it, everything looks really out of place in such an apartment. Plus, Kusakabe-san mentioned Benardo Russo went on business trips some times. It is unusual for a well-off business man to be in this neighborhood."

His ex-home tutor smirked. "Now you're thinking, Dame-Tsuna."

"Ahaha, great job, Tsuna!"

Are you two complimenting or insulting me? Tsuna asked silently before getting back to the task at hand. "Anyway, Reborn, are you thinking towards robbery as a motive?"

"At first, yes, but since there are no signs of forced entry or rummaging through possessions, it's unlikely."

"So we're back to zero," Tsuna sighed and decided on a different approach. "Let's leave motives aside first and get the cause of death from Chrome and Mukuro."

The others agreed and focused on the forensic team just ahead. Once they're close enough to talk without shouting. Tsuna called out to Chrome. The petite female turned to them. "Boss." She said to Tsuna with a small smile before greeting the other men.

"Hey, Chrome, what have you got so far?"

"The time of death is about five hours ago, so approximately at 9 AM. This is quite a strange case, there are absolutely no wounds on the victim – except for old scars, possibly from gun or fist fights. There is no bruising either, suggesting that there was no struggle between the victim and killer."

"No wounds? Then, could it be poisoning?"

"I'm thinking the same thing. Though there are no obvious signs of poisoning at the moment, only a toxicology screen can tell for certain. That is all I have at the moment, I'm sorry I wasn't much of help, Boss." Chrome concluded and looked downcast by her lack of information.

"No, you've done exceptionally well, my dear Chrome." Mukuro said and placed an encouraging hand on his sister's shoulder.

"Mukuro's right, don't be so hard on yourself. You've got everything you could get from a crime scene in such a short time, the rest needs to be done in the laboratory." Tsuna added, giving Chrome a comforting smile.

Hearing such words from her two most respected people, the purple-haired female cheered up. "Thank you, Boss, Mukuro-sama."

"You're welcome, Chrome. And I'm only saying what's true, you're much more talented than you give yourself credit for."

"Indeed," Mukuro agreed then focused on the brunet. "Now, Tsunayoshi-kun, I believe it's time for us all to go."

"Right," Tsuna nodded and prepared to leave the crime scene. But before that, he needed to give out the tasks for some people to do. "Mukuro, you can stay here to oversee the gathering of evidence. Yamamoto, you can help Chrome's team get the body back to the lab. And Gokudera-kun, see if you can get in contact with the victim's family when we get back." The Chief ticked off the check list of jobs in his mind and concluded that that was all. Reborn was his adviser who rarely got involved, so nothing was needed to be assigned to him. And Hibari, well, Tsuna wouldn't dream of ordering him around any time soon. The skylark usually just investigated the case his way, but using the information the team collected, and reported back to him later on.

Everyone sounded their agreement, Yamamoto and Mukuro got to work while the other three headed for the exit. As they got out of the apartment, a journalist ran up to the group and stopped in front of Reborn. "Umm…a-are you the Chief…" the journalist paused, looked down at her notes. "S-Sawada T-Tsunayoshi?" she continued to stutter, clearly awestruck by Reborn's looks – if her heavy blush wasn't an indicator already.

Since Namimori was such a small and peaceful town, the members of the police force rarely came into the spotlight so it was no surprise that little more than their names were known, no matter how good-looking all of them might have been. The woman must've chosen the person she thought to be most fitting for the role out of the three.

"Actually, that'd be me." Tsuna called out and the journalist turned towards him. Judging from her expression, she probably hadn't even notice him earlier. Seeing surprise and skepticism written all over her face, Tsuna had to stop himself from openly rolling his eyes. Every time he'd told an acquaintance what his profession and rank were, the reaction had pretty much been the same and that was getting kind of annoying. He couldn't really blame the others for making the mistake though, since everyone else in his team looked more suitable as a leader than him. After all, he was the shortest out of the group and the plainest-looking (in Tsuna's own opinion), even Chrome – the only female – was his height. Not only that, Tsuna had inherited mostly from his mother's genes, making him look a lot more feminine than the other young men his age.

"O-oh, I'm terribly sorry, Sawada-san," the journalist apologized, still trying to hide the doubt in her voice while looking into those big honey-colored eyes. "I'm from Namimori Times, would you mind answering some questions on the case?"

"Well, I would love to help, but I'm afraid that we have no more than what you already know at the moment."

"No way, surely you can give some more infoma-"

"Oi, didn't you fucking hear him? Stop bothering Juudaime!" Gokudera cut in, one hand reaching for his dynamites.

The woman squeaked and flinched from the glare she was receiving and backed away. "I-I'm sorry, I'll come back another day!" She gave a quick bow in apology and practically ran off.

"Gokudera-kun, that was a little too harsh. She was just doing her job." Tsuna said, feeling sorry for the poor woman.

"Don't worry about her, Juudaime. And journalists are very persistent, it's best to turn them down as soon as possible."

The silveret did have a good point, but Tsuna still believed there were better ways to do it. Oh well, that's Gokudera-kun. "Anyway, we should get going, there's still work to do." From the corner of his eye, Tsuna could see another police car that belonged to Hibari already reversing out of the car park.

"Indeed there is. And in your case, Dame-Tsuna, a lot." Reborn reminded and rejoiced in the exasperated groan that came from Tsuna.

It's been nearly a week since the discovery of Benardo Russo's death, and the police of Namimori was still no closer to solving anything. In fact, the case became even more confusing when the tox screen results showed no sign of anything out of the ordinary. However, there was definitely foul play involved since the medical records of the man showed that he was in perfect health prior to his death. And healthy men don't just literally drop dead like that. To make matters worse, there had been not one, but three more cases reported within five days. There were also no wounds or chemical poisonings detected on all three victims. Hence, Tsuna and his team had concluded that these murders were done by the same person.

"The victims are Benardo Russo, Emilio Nigro, Luca Lagudi and Isanami Mizaki. Similar symptoms and cause of death – or lack of thereof – are present on all four. Since the three men are Italians, the culprit seems to be aiming for foreigners, but that doesn't explain the latest victim. Although, she is Lagudi-san's lover who was also killed at the same place, she may have just been there at the wrong time," Tsuna paused for a minute, looking away from his report to the silver-haired man on his right. "Gokudera-kun, were you able to get in contact with any of the other victims' families?"

The silveret shook his head. "No, when I tried to look for information about them before they came to Japan, nothing came up. And it seems that Benardo Russo lied to his neighbor, all the male victims are unemployed."

"That can't be right, they were able to pay the rent and looked to be pretty well-off."

"It is quite hard to believe, but it's the truth. I couldn't find anything else, I'm a disappointment. I'm sorry, Juudaime!" Gokudera moved to get down on his knees, but was stopped by Tsuna.

"N-no, it's fine, you did your best. Please sit down, Gokudera-kun!" Once his right-hand man had settled down, Tsuna sighed and continued. "Anyway, this is getting bizarre. We have seemingly four mysterious men plus one average citizen, and they all died of mysterious causes. And yet, we have nothing. The Medias are going to love this."

"They're already lining up outside. Look," Reborn said and pointed to the window nearby. Sure enough, reporters from every channel and newspaper known to Japan were in the crowd at the entrance of the police station. "Yamamoto, Ryohei, didn't I tell you two to chase them off?"

"We extremely did, they just regrouped after that!"

"Haha, yeah, we can't stand there forever." Yamamoto defended himself along with Ryohei.

Reborn nodded and let the two off the hook. "Dame-Tsuna, if you want to survive, I suggest you stick to Hibari."

No way, I'll be bitten to death instead. Tsuna expected Hibari to argue back to Reborn, but the skylark said nothing. Maybe he doesn't consider one person as crowding. As he was about to continue talking, Tsuna – along with everyone else - saw a reporter sneaking around the bushes in an attempt to get closer to their room and rolled his eyes.

From his spot against the wall, Hibari smirked and pulled out his tonfas. "For trespassing, that herbivore will be bitten to death."

"Wait, Hibari-san! Please sit down, we're still in the middle of a meeting! Your men can take care of it!" Tsuna called out as Hibari just reached the door, causing him to stop. The brunet realized what he just did and gulped. Crap, I just ordered Hibari-san. I'm going to be bitten to death!

When he saw the skylark turned around and headed towards him, Tsuna let out his signature shriek. Much to his surprise, Hibari walked pass him and back to the wall. Over the years, Tsuna had gained some respect and was seen as pretty close to an equal to the raven-haired man. As prove, Tsuna was now addressed mostly by his name or "omnivore" (crowding with herbivores sometimes and being around carnivores the other). He was probably the only other person – aside from Reborn – who could convince Hibari to do something. Exhaling a sigh of relief, Tsuna resumed the meeting. "So, let's get back to case. Umm…let's see, does anyone else have anything to contribute?" the Chief asked, looking around the table. Some hope rose when he saw Mukuro chuckling and looking straight at him. "Mukuro?"

"Kufufufu, I believe I did find something at the second crime scene that will be of interest to you."

"What is it?"

Mukuro moved to stand beside Tsuna before taking out a small plastic bag that was used for containing evidence from his pocket and handed it to the Chief. Tsuna picked up the bag and examined it. The content looked like a badge at first, but the back showed a USB imbedded inside some sort of gold-plated (or maybe real gold?) emblem. The center of the crest was a golden bullet inside a shield, decorated with floral patterns, two shotguns on the sides, a clam with wings attached on the top, and lastly, a banner that read 'Vongola' on the bottom. After registering all the details of the USB, Tsuna looked back up to Mukuro, waiting for him to explain.

"I would love to explain to you myself, but I believe your advisor over there will do a better job," mismatched eyes turned to Reborn. "Right, Arcobaleno?"

Upon hearing this, Reborn – whose attention was previously still on the USB – met Mukuro's gaze with amusement. The hitman tilted his fedora upwards to get a better view. "Oh? It's been a while since someone have called me that. This explains a lot about the victims. You must have dug very deep to find that name and about the Vongola. As expected of Rokudo Mukuro."

"Kufufufu, of course, finding information is my specialty. But even with my skills, not much showed up. Your world really is a secretive one."

Everyone else listened to the two with either interest or confusion, especially Tsuna. He did not understand any of what they were saying, and being left out of the loop wasn't a very good feeling. "Reborn, what's all this about? Why did Mukuro call you 'Arcobaleno'? What's that, anyway? And what is the Vongo-"

Before Tsuna could finish his last question, he was smacked on the head by his ex-home tutor with Leon in rolled-up-newspaper form. "One question at a time, Dame-Tsuna. You're blabbering."

"S-sorry," the brunet pouted and rubbed the back of his head. "So, why did Mukuro call you Arcobaleno?"

"Because that's what I am."

Tsuna wanted to do a face-palm at the answer, but held himself back. "Reborn, now's not the time to be joking."

"The Arcobaleno is a group consisting of the strongest seven people in the world, or more precisely, the Mafia."

"Strongest in the world?! So when you said you're the number one hitman, that was true? W-Wait a minute, Mafia?!" Tsuna gaped, he knew Reborn was strong, but he never expected the man to be that famous.

"Of course, who else do you expect a hitman to work for?"

"Good point, but what does this have to do with the Vongola?"

"Still as slow as ever, I see. At this rate, you'll be going back to training, Dame-Tsuna." Leon morphed into a gun in Reborn's waiting hand.

Memories of the Spartan exercises came back to him and the Chief shrieked. "Hiiiiee! No, please have mercy!"

"Hmph, I guess I'll spell it out for you just this once. The Vongola is a Mafia Family, or Famiglia, in Italy. It is not just any Famiglia, it is one of the strongest and most influential there are ever since its establishment around 400 years ago. The owner of this USB must have been a Mafioso of the Vongola. And the other victims are most likely Mafiosi as well."

"Oh, that would explain why they're so well-off, their Italian background and their lack of identification," Tsuna concluded and breathed a sigh of relief when Reborn hummed an agreement. "Mukuro, was there anything useful in the USB?"

The blue-haired man shook his head. "No, whatever was on there had been wiped out beyond recovery."

"I see, good job anyway. At least we found out about their connection to the Vongola. Thank you for the hard work." Tsuna smiled at Mukuro, now they finally had a lead.

"Kufufufu, my pleasure, Tsunayoshi-kun."Mukuro flashed him a grin and returned to his seat, ignoring the snort and glare that came from Gokudera.

"Um, what should we do now? We know this case is related to the Mafia, should we contact the Italian police and hand it over to them?" Tsuna asked aloud.

"No," much to his surprise, Hibari contributed to the meeting for the first time. "The crime happened on Namimori's grounds, we will handle it."

"Hibari's right, why should we let someone else take the glory when we're capable of catching the killer ourselves?" Reborn added.

"You two do realize the Vongola is all the way in Italy, right?"

"So? We'll fly there."

"Hn."

These two are crazy! Tsuna sweat-dropped and gave up, there just wasn't any way he could convince them.

"Besides, the Italian police wouldn't be of much use. The underground world of Mafia, like Mukuro said, is very secretive. Outsiders would have a very little to no chance of finding anything useful. We, on the other hand, have an advantage since I happen to be an ally of the Vongola." Reborn continued smugly.

"Are you thinking of going back to Italy alone to investigate?" Tsuna asked, half worrying about Reborn's safety and half cheering for his possible absence.

"Nope, that's the boss's job. Meaning, it's yours, Dame-Tsuna. I'm only your adviser. Also, I can't just leave my charge/useless student by himself."

"But how would I do that?! You just said it yourself that outsiders would never find anything."

"Which is why you," Reborn paused and pointed at Tsuna. "Are going undercover, as a Mafioso."

There we go, first chapter done. I hope that was alright. Tell me what you think by reviewing! Thanks for reading! Random note, the Vongola crest USB actually exists, and I happen to own one. Everyone who has seen it thinks it looks really cool. ^^ Oh, almost forgot, happy birthday to Tsuna and a belated one to Reborn. I love you both!...By the way, has anyone checked out the new anime, Psycho-Pass? The character design is done by Amano Akira! The main male looks exactly like TYLHibari and the female is a FemTsuna. :D