Disclaimer:

I do not own Katekyo Hitman Reborn nor do I gain any money by doing this. KHR and its characters belong to Amano Akira. The title of this story is greatly inspired from Mariah Carey's 'All I Want for Christmas Is You'

Warning:

It's a Christmas Challenge fic from ilYamaTsuna7227li. It contains Yaoi, mainly 8072 (Yamamoto x HDWM!Tsuna) and a slight 8027 (Yamamoto x Tsuna), as well as slight All27 (Guardians x Tsuna). Alright, you have been warned! I don't want any complaints, reports or flames about this story since I don't think I do you any harms by uploading this story to the net.

Beta-ed by KHFFMEE-8027. Thank you again for being such a reliable beta and a great friend!

All I Want for Christmas Is You! ─ Chapter 1

'Christmas Plus Reborn Equals Trouble'

It's around 10 PM in Namimori when a young brunette boy was still playing with his game console, looking terribly captivated by the screen in front of him. The boy was the one and only Sawada Tsunayoshi, a Dame middle year student in Nami-chuu. Tsuna was playing a new role-playing game that he just bought a couple days ago. And judging from his looks and how late it was, the game was definitely one hell of a definition of addicting. One that he couldn't even stop, just to go to the bathroom, eat or even to sleep.

Wonder what kind of game that was? One thing's for sure, Tsuna's not playing Sailor Moon. Why? Because it's too explicit for kids to play! Heck, the school girls go naked in public like some manic exhibitionists and change into kinky sailor suit? How the hell it's even rated K for kids? More importantly, how come their enemies always wait for them to change?

Actually, aside from that, Tsuna said it's too girly to play that. Well, he once played it and not interested by the whole gameplay. He got the game from Maman on Christmas a couple years ago. She said that it's pretty popular. Yeah, for girls.

Well, talking about Christmas and presents, of course, almost everyone was looking forward to Christmas. In fact, it was just a week away in Namimori. Surely, everyone would be busy to prepare the decorations, presents, foods, surprises and everything that was needed for Christmas. Of course, Tsuna and his family would also be preparing to welcome Christmas. But what he didn't know was he's in for a total surprise… just about now.

"What?!" Tsuna shrieked, his face was utterly shocked, his walnut eyes were staring the empty blank screen in front of him in disbelief, "T-the game! N-no! I haven't saved it yet!"

Oh, so that's why he was pretty much dumbstruck about it. His addicting game just suddenly stopped out of the blue. Poor Tsuna. He hadn't even saved it yet. All those hours spent playing the addicting game just went into thin air. Snap. Just like that. Wonder what was just happened?

He didn't need to wait that long though since the culprit decided to show up in front of him.

"You need to listen when someone's talking to you, Dame-Tsuna." Reborn said, his face was making a smug expression and his hand was holding something that looked like a black cable along with the output piece.

"Reborn! Did you just plug it off out of the blue like that?! Why?" Tsuna asked, looking incredibly upset of the inhumane treatment that his tutor gave him, "Are you like, I don't know, insane maybe? If you didn't notice, I was playing that game and I was about to defeat the boss!"

"I know," Reborn nodded, "But still you need to listen when someone's talking to you," the cursed Arcobaleno smiled his impish, evil-like grin which made Tsuna to pop up an enlarged vein on his forehead, "Besides, you can always continue and redo the game later. It's not like you're playing it on rental."

"But I've spent hours! Not only that, I just got this very rare amazing weapon and it can kill the enemy in one shot!" Tsuna complained, still feeling irritated to lose it all because his tutor just turned off his game, "And thanks to you it's all gone! Gone, you hear! Bye-bye! No more!"

The boy was a little bit annoyed at the moment. How could he not? Imagine how incredibly irritating that was when the game was suddenly turned off because of power outage or something like that, just when he hadn't saved it yet? Especially when he got something just so incredible and extra rare too?

"Good," the baby mafia nodded understandingly, "And if you don't shut up, I will add one more on that 'gone' list."

"And what is that?" Tsuna asked. He raised his brownish eyebrows and threw a questioning look. "You're going to make my PS3 gone too?" he retorted rhetorically, his tone was a little bit daring that it seemed unbefitting to him.

It's understandable though. Don't ever mess with a person who is extremely pissed off because he just lost his game data. And, Reborn, you're messing with a wrong bitch now.

Then again, who was he fooling? How long had he known this sadistic baby wearing mafia cosplay? Well, long enough to know what his tutor answer was.

"No," the baby shook his head, "I'll add you on that 'gone' list. Don't worry I can make a nice obituary for you. How does missing in action sound? Nice enough?"

But the brunette just wouldn't stop the fight! He could be all Dame as he wanted but not if it's involving his game life! Never underestimate a hardcore gamer like Tsuna!

"You wouldn't dare," the Decimo said, squinting his eyes in a rather piercing manner, giving a total, all-out battle to the Arcobaleno.

"Would I?" Reborn stated simply.

"I-if you kill me now, w-what do you think you're going to say to the Ninth?" Tsuna could still launch his fight to the sadistic baby, "Y-you are supposed to watch over me, right? What would you say to the Ninth if I were dead suddenly?"

"I'd just say a hitman from a mafia family shot you in the head."

"Y-you're p-planning to g-give a false r-report to the Ninth?" Tsuna asked, "I never thought that you would lie like that!"

"What are you talking about? I am a hitman and I came from a mafia family too. It's not lying. It's just not telling the truth." the Arcobaleno explained it straightforwardly, making the Decimo to be rather shocked.

"It's not different at all! Not telling the truth means lying!"

Reborn immediately changed his chameleon pet to a small 9mm handgun and pointed it to the brunette's head with quick successions, which made Tsuna to gasp breathlessly, pretty much terrified.

"Are you going to ever stop whining? It's starting to get boring." Reborn asked, his hand was ready to pull the trigger and go BANG BANG on Tsuna's head.

"Hieee!" he shrieked pathetically, "S-stop that! It's dangerous!" He gave his forceful drawback to avoid that pointing gun in front of him. One shot and he would instantly meet his creator. Maybe after that he could protest why he got such a sadistic, homicidal tutor.

"Dame-Tsuna will never change, huh?" the hitman put aside his gun, "I spare your little life this time. Besides, you need to do something either for this Christmas."

The Vongola Decimo blinked his eyes, still uncertain of what he could do. Still, knowing that the idea was coming from his tutor, he knew that it wouldn't be good. At all.

"It doesn't have anything to do with that! Any sane person will run when someone points a gun to their head!" Tsuna protested, pouting his lips cutely.

"Were you planning to run away with your tail between your legs, Dame-Tsuna?" Reborn asked, a smile, a satanic one, printed on his face.

"Well, no! But the point is—" but before Tsuna finished his statement, he got cut by a sudden answer from the Arcobaleno.

"Then, if we use your logic back then, that means you are not sane," Reborn concluded easily, "Gee, why am I not surprised?"

Knowing that there's no point in arguing with his tutor, the brunette decided to just drop the conversation. It's not like he could win the debate after all.

"Fine," Tsuna sighed in a tired gesture, "You win. Just stack on all the trophies. I don't mind. Because one day, just so you wait, one day, you're going to say that I'm right." The brunette determinedly said it to his home tutor slash debate rival, thinking that one day he would win his argument against Reborn.

But seriously, geez, what fun is there in winning against a baby?

"Good," Reborn agreed, "But since the day hasn't come yet, now the peasant should listen to the king."

Hearing what the yellow pacifier holder said, Tsuna could feel the urge to facepalm. But still, he just decided to let it off. It's never good debating the skilled hitman, Reborn.

"What is it anyway? You're talking about I need to do something for this Christmas before?"

"You're right," the Arcobaleno nodded, he adjusted his black fedora a little, giving a mysterious vibrant from his covered face, "Since it's Christmas, it's time for Christmas party Vongola style."

Tsuna looked startled, slightly confused by what his tutor just said to him but not to the point 'til it's suffocating. In fact, he was able to recover from his shocked state in just minutes. Now, the small brunette looked like his ass just got bitten by sharks figuratively.

"Christmas? Vongola style?" the small brunette sighed, slightly feeling tired of the outcome that would come from the event. "This is one of your 'fun' games again, isn't it?"

It's actually not uncommon for Reborn to do some events like this. He celebrated a lot of events using this so-called 'Vongola style' party, starting from New Year, Mother's Day and so on. This time, it's time for Christmas then. Wonder what would Reborn do this time?

"Yup," the hitman bobbed his head, confirming the previous comment from Tsuna, "This is not one of my 'fun' games though. It is said that this event was created by the Vongola Primo himself and has been celebrated ever since in commemorating Christmas."

"Really?" Tsuna asked in great disbelief, wondering whether what his tutor said was true or not, "What do we do then?" he actually felt a little bit energized after hearing that this event was created by the founder of Vongola Famiglia.

"Not we," Reborn corrected, he paused for a while, probably mentally laughing at the poor brunette's fate, "You. You are in charge of everything in this Christmas party, Tsuna."

"Hieeee!" again, he shrieked after knowing the huge responsibility was put on his shoulders, "Why me?!"

"Isn't it obvious?" Reborn snickered, his face expression was actually making a weird face that probably could be implied like, 'Yeah, taste the rainbow, bitch!', then he added again, "You are the family boss. It is the duty that only the boss should do."

Tsuna paused, still too shocked to even retaliate what his home tutor just said to him. His Dame mind couldn't grasp the whole concept this instant. And seeing that his student wasn't protesting or replying anything, Reborn decided to continue again.

"As a mafia boss, you should care about your subordinates. Usually, you are the one that is served by all your guardians. That's why this Christmas event is a time to return the favor. This time, it's your turn, as the head of the family, to serve your guardians." Reborn explained, giving an actual sense to the whole thing that he said before,

"It's easy enough. You just have to prepare the Christmas party on your own, starting from the decorations, settings, surprises and so on. Then, you are also to find the right presents that your guardians really want and make them thankful of your gifts. If you care and understand your guardians deep enough, you should be able to know what they want for Christmas." The Arcobaleno smiled, making a happy and also a smug-like grin,

"It's only logical for a Vongola mafia boss to know and nurture the relationship with his guardians."

What Reborn said was true though. Christmas was a right time to strengthen the bond between a family and friends. It's quite a special occasion that had such a magical gift for everyone. On Christmas, it's only fair and logical for everyone to be happy. Of course, it included Tsuna and his friends too. However, it's too bad he didn't know what kind of surprise he would get this time.

But after listening to Reborn's explanation, Tsuna gave a quite interesting retort to his tutor.

"But I'm not a mafia boss! It's dangerous!" the brunette protested, unwilling to accept his title as Vongola Decimo or to even inherit all the power of the Vongola Famiglia, "And I never want to be one! You're the one who always put me that way!"

"Don't be ridiculous. You already went to the inheritance ceremony back then. Like it or not, almost all of the Vongola family colleagues already know about you," Reborn explained matter-of-factly, then he added again,

"Including our enemies, more or less. Simply put, you are well-known now. Some even want you dead too."

Tsuna gapped his mouth wide open, his eyes widened in quite a shock, he looked terrified. Well, that's a little bit an understatement. He looked as if he just saw dead bodies coming back to life, walking towards him and wanting to rip out and eat his brain. The last remark that Reborn said to him kept ringing in his ears,

'Some even want you dead…? News flash, you're gonna get killed. Soon. But before that, you're gonna get raped first and killed or killed first then got raped, whichever way works, you're gonna die anyway, so why bother? You're so dead Decimo. You gotta run away now. Hide and hope that you won't be found ever. How about running to Italy sounds? Wait, that's where the mafia comes from!' All of these thoughts were racing in the Decimo's mind.

And seeing that Tsuna was more than stunned, Reborn decided to add again,

"Besides, being a mafia boss as the Vongola Decimo is a part of you. It's your other half, Tsuna. Wishing that you don't want to be one, it would be as if you wish that you don't want to breathe."

No longer breathing? Now what's with this 'death' talk came suddenly? Of course, it made Tsuna to be rather taken aback of such words. He's kind of a little bit sensitive when it came to such topic now, thanks to his Dame self.

"Well, if I have to be targeted by other family, or have to run away to Antarctica and suffer from the freezing temperature just to hide and save my life, maybe I don't want to!" Tsuna replied, making a statement that he chose to just die soon rather than had to live in fears or to run away to Antarctica and hide.

Why Antarctica, by the way? Well, he thought that no one lived there, so it would probably be the safest place for him to hide and probably be terrorized by his paranoid fears.

But then, the evil-takes-place-in-baby-form-with-mafia-suit Reborn changed his Leon back to his favorite Beretta and pointed it in front of Tsuna's left chest, aiming right at his heart, making the Dame brunette to be dumbstruck and instinctively raise his hands in front of him all five,

"That's too bad," Reborn said with a pity, "Ciao Ciao, Tsuna." he cocked his gun, making a loud audible click sound which was followed by the girlish shriek from Tsuna. It sounded like a girl screamed help from a rape.

"Hieeeee!" he screeched, "Reborn! Stop that! D-don't point that there! If you accidentally shoot it there, my heart will be stopped this instant!"

"At least now you know where your heart is. How nice. I expect your Biology test will be good." Reborn smirked his mischievous grin, which made the brunette to have another enlarged vein popped out on his forehead.

"I already know where my heart is! I don't need you to do that!" Tsuna protested in disregard, "My life span is getting shorter whenever you are around!"

Poor Tsuna. He always got this mental abuse from his tutor. It's not Reborn's fault either though, if he's not that Dame, he wouldn't be treated like that from Reborn. Probably, what Reborn did to him was just a joke. Maybe. Who knows? It seemed real though. At least he didn't get beaten or kicked again like usual.

"Moving on," the Arcobaleno said, "You've still got one week before Christmas. That means you still have the time to prepare the gifts or the decorations for the party. You can also ask around your guardians to know what they want for Christmas."

Reborn gave out a warm smile to the brunette, which was something that was extremely rare for him to do something like that,

"Besides, don't you want to give them Christmas gifts too, Tsuna? Don't you feel anything at all? About your guardians that is. Don't you feel any some kind of affections that makes you want to give them something? Don't you feel like your guardians are important to you? Or at least one of them feels like he's very important?"

Wonder what did Reborn mean by that? Why did he suddenly say something about giving affections to Tsuna's guardians? Could he possibly be hiding something from Tsuna? Something that the brunette had not noticed it yet? About his affections with one of his guardians?

"Yeah, I know that," Tsuna confirmed, "Honestly, I want to give them a present too. I mean, I'm not saying that I'm their boss and they're my subordinates. I view them as my friends. Last Christmas, I didn't get to celebrate it and I didn't really have any friends at all. And now that I have some friends that I can rely on, I'd like to celebrate it with them and give them gifts as a token of my gratitude."

"But what if they don't like my presents?" Tsuna asked, slightly frowning in a sad gesture.

He viewed them as his friends? It seemed Tsuna hadn't noticed his feelings yet. He still viewed his guardians as 'just friends' only. And this was not gone unnoticed by Reborn. That's why he planned to make Tsuna realize about the truest feelings inside of the brunette's heart. The fact that the Vongola Decimo might fall in love with one of his guardians and the fact that one of his guardians actually considered him as 'more than a friend'.

'I see,' Reborn wondered secretly in his mind, 'You haven't noticed it yet, huh? It's pretty obvious yet you still haven't seen them that way? Well then, there's only one thing that can make you realize it.' the hitman seemed like he's lost in his thoughts.

Knowing that the brunette was waiting for him to reply, Reborn then decided to say,

"Don't worry Tsuna. I have faith in you. I know that you can give the best presents ever for your guardians and make them be grateful to you," Reborn paused for a second, adjusting the brim of his hat again, "Besides, there will be a punishment if you cannot please your guardians with your gifts."

"P-punishment? What again? Am I going to be fined, my deepest wish wouldn't come true or what?" Tsuna asked. He pointed out all the punishment that Reborn once said to him before on the previous Vongola style events.

"I'll let you know later," Reborn said. He cleared his throat and continued, "As of right now, prepare Christmas with your dying will!"

Suddenly, a flying roundhouse kick came to make contact with Tsuna's face. Unable to hold on to something, the brunette coincidentally fell to the ground in a rather pathetic manner. He hit the ground with his back faced against the floor and he winced up his face expression in pain as a throbbing feeling came on his face.

"What did you do that for?!" Tsuna protested, still rubbing his face with his hand after getting kicked by his tutor.

That was when he noticed something was actually entering his throat. Tsuna didn't know what the hell that he just swallowed. But he didn't need to wonder that long though since he could feel something was changing to his Dame self. On top of that, he could see Reborn was holding a slender bottle with blue colored pills inside of it. Not only that, Tsuna was now wearing his knitted silk gloves with number 27 written on the front of it.

And thus Tsuna noticed it all with his hyper intuition. His brown colored eyes were now glazing with the color of beautiful sunset. His eyebrows were furrowing, as if he was thinking a lot in a rather confused gesture. A bright lit orange flame, the pride dying will flame of Sky, came on his forehead, marking that he successfully changed to his hyper dying will mode.

Noticing all that, Tsuna could only ask and wonder,

"Reborn," Tsuna called, his voice tone was changed into somewhat solemn and thoughtful, "Why did you turn me into hyper dying will mode?" Tsuna inquired, he felt slightly confused of all the things just happened to him.

Even with his hyper intuition, he could barely guess what his tutor wanted to do with this. He assumed that Reborn wanted him to use the hyper intuition in order to give the best gifts for his guardians. It's too bad that Tsuna hadn't noticed Reborn's true intention was to make Tsuna realized his own feelings with the hyper intuition or to realize that his guardians might have a romantic feeling to him.

"Because it's easier this way." Reborn stated simply, "Now, Tsuna, go meet with your guardians and prepare the Christmas. Don't forget that you also need to prepare the party and the decorations for Christmas. Let's see how determined your dying will really is."

Deep down, Reborn planned to make Tsuna noticed his affections to his guardians. After all, it was his job as a tutor to do that.

"Reborn," Tsuna sighed again, "I don't need to be in this mode just to ask them." he said, still unsure why he needed to be in his HDW mode just to ask the presents.

Reborn only smirked and said,

"We'll see then."

After that, Tsuna took his leave. He flew out of his window just to meet his guardians. He knew that it was already late night this time and the guardians were probably already asleep. But since there's no school for tomorrow because he's on his Christmas break, he thought that there's no time to lose.

Besides, something telling him, probably his hyper intuition, that he should go and see Yamamoto Takeshi, his very own Rain Guardian.

Still waiting on Tsuna's room, Reborn looked at the window where Tsuna left and said,

"I hope he can notice it soon," Reborn whispered softly, "He looks fine though. It's a gamble. Will he get the same outcome like Basil after taking the expired Dying Will pills?"

Reborn smirked knowingly. He gave the expired pills on purpose, hoping that Tsuna could experience the same situation like Basil once had.

And thus, Tsuna left without even knowing what would be happened to him after taking the expired dying will pills. Wonder what will be happened to him then? Who knows? Only the smirking Reborn knew what would be happened next.

One thing for sure, Tsuna, who's in his hyper dying will mode, was heading to Yamamoto's residence…

─To Be Continued─

Author's Note:

This is a Christmas challenge fic from ilYamaTsuna7227li. Don't worry. Yamamoto and Tsuna relationship will be discussed thoroughly on the next chapter! This one is just a prologue before the challenge part. The missing decoration of Christmas will be there too on the later chapter!

Other than that, tell me what you think for this story? Review never ceases to make the author feels happy and want to write for more! :D

Sincerely,

8027forever