My first Katekyo Hitman Reborn fanfiction! I did take some inspiration from The Kid That Was Vongola Decimo by Initials-eMpTy.

I don't own Katekyo Hitman Reborn though which is good because I would probably mess up that masterpiece. However if I did, we'd see the Arcobaleno and the Vindice a lot more because they deserved more screen time.

"We are gathered here today because someone," Reborn glared at the coffin, "Couldn't stay alive."

Tsuna's funeral very quickly dissolved into a brawl after that when Gokudera took offense to Reborn's comments and incited Ryohei to join him. That prompted most of the rest of the Guardians to fight with the Varia joining in for the hell of it. Reborn simply pulled out Leon and started firing into the dust cloud.

Gokudera froze when he heard the ominous rasp of tonfas. Hibari stepped away from the wall he had been leaning on, eyes flashing dangerously.

"For disturbing my nap, I will bite you all to death."

It took a while for poor Tsuna's funeral to continue. He hadn't even had a dignified death to speed it along (the short story is that sun flames activating a Pinzu Time Bomb explosion makes it ten times worse and unfortunately he was the closest to I-pin).

When it was finally continued there was much sobbing (Gokudera), wailing (Gokudera), and cackling (Mukuro). The Vongola was reluctantly passed back to Nono's leadership while Nana and Iemitsu worked on having a replacement child.

And so passed the sadly short reign of the Vongola Decimo from this world.

Unfortunately Sky users were plagued with trouble and often could not stay dead for long.*

Tsuna fully woke up when he was about one year old. He surveyed his bedroom from his crib.

Oh thank god, he thought, at least I didn't have to remember being born.

He then considered crying because how weird was his life that he didn't even care he had just died and been reborn? Then again he had dealt with far stranger things.**

Wasn't like he hadn't gained a baby for a tutor and then was taking over the mafia at a young age.

So instead the former Decimo settled back into the soft cushion to evaluate a life plan. (Reborn's training held firm even in the face of this. His tutor was scary and somehow would always know). This was promptly thrown into disarray when his mother finally returned to see him.

Tsuna cooed, beaming up at the face of his beautiful mother. He had missed her, paperwork and damages from his Guardian's brawls had kept piling up till he could barely steal a vacation. Granted it had become better when she had put herself to learning the mafia ways and rained unholy fury on the ones who kept her son away.*** He got his vacations after that.

"Tsu-kun! Did you miss your older brother, Ieyatsu?" She chirped. As if on cue, a boy poked his head into view.

Tsuna looked up at the vaguely ten year old blond who was apparently his older brother.

And beamed.

He ignored the thump as he inwardly cackled. New world where he could escape the Decimo title and all he had to do was conceal his true knowledge? Sign him up!

Let it be known that Tsuna had been wholly corrupted by Reborn and had gained the hitman's sadistic sense of humor. He was positively gleeful at the thought of someone else going through the Spartan training.

All he would need now would be a camera.

A year and a half later, Tsuna was regretting his joy.

It wasn't that Ieyatsu was just as clumsy as him and he had learned the hard way. It wasn't even that he should be regretting gleefully awaiting his brother's probable torture.

He was just really bored and lonely.

Being a two year old was hard. He had all the knowledge of a powerful mafia boss but nothing to do with it. He had briefly considered contacting Kawahira to reveal the Arcobaleno solution but dismissed it.

Cruel as it was, he had no idea if Reborn would stay with the Vongola and Checkerface had a tendency to attack people that he decided were a threat. And having knowledge of the timeline could be a threat right now.

He couldn't even await his Guardians' chaos because they weren't his Guardians anymore.

Man, keeping timelines on the right track was really depressing.

The adorable boy flopped down in the dirt, pouting at the sky. Even sending Ieyatsu into cuteness overload wasn't as fun as it could be.**** What did it say about him that he was barely scraping by without some degree of chaos?

He blamed Reborn.

So he did something that could definitely screw with the timeline if it was ever found out and probably would freak out Ieyatsu so much.

Tsuna burst into orange flames. He tempered them down and hummed as the relaxing harmony poured into his mind. God, it was always like being on drugs whenever he did it. It took him forever to learn the trick to it though.

"Gao."

Tsuna jolted up immediately because he recognized that growl. It took everything he had not to burst into manly don tears.*****

The tiny sky lion purred as it slowly drew closer and Tsuna jumped up, lunging forward to bundle it in his arms. If it hadn't been for Reborn's training, he probably would have fallen over. He hiccuped quietly into Natsu's mane.

He wasn't alone.

His forehead flame extinguished as he regarded the little cat. The whys could come later, now he had to bend his cuteness to a purpose. A purpose he would complete with his dying Will.

Namely convincing Nana that a lion cub with a fiery mane was a perfectly normal cat and a great pet for a two year old to have.

Tsuna slowly trotted into the kitchen, smiling radiantly. "Mama! Tsu can have?" He said. Nana turned away from the stove to regard her younger son. He had masterfully disguised the flaming mane of Natsu. By wrapping his scarf around the cat's neck then using the other end as a leash.

Tsuna upped the cuteness factor and beamed up at his mother. "Gao?" Natsu asked. Nana squealed and pulled out a camera.

"Daw, Tsu has found a friend!" She cooed. God he loved her obliviousness to weirdness. Ieyatsu looked up from where he was struggling with homework and frowned.

"I don't know, that cat looks weird. What if it hurts Tsuna!" Ieyatsu had inherited Iemitsu's pure adoration of his son. Made more powerful by Tsuna's unconscious pure adorableness. Which was insanely fun to play with.

Tsuna scooped up Natsu as best as he could and turned to look at his brother. His eyes shone with tears, his smile wobbled, and even Natsu started to look sad. "But… Tsu likes him!" Ieyatsu went down like a lead balloon.

"What will you name him?" Nana asked, putting away her camera. The sad puppy look vanished as Tsuna put Natsu back down and turned to his mother.

"Natsu!"

Two years later brought a knock on the door. Tsuna giggled as he watched Nana, ignoring the sparkly aura it gave off, and patted Natsu. The little lion now had a lovely orange collar neck vest to go with his hat. Which worked well to conceal his mane and make the cat even cuter.

Finally his boredom would be at an end.

*See Byakuran.

**See Reborn, Gokudera at times, pretty much all of his guardians, Xanxus and the Varia in general and the time he traveled to the future. At least he hadn't woken up in a coffin.

***Nana was a scary woman when people messed with her kids. Somehow Iemitsu had totally missed it.

****Tsuna was cute in general and becoming younger had compressed the cuteness and made it a 100x more powerful. Reborn had taught him well.

*****Which Reborn had instead referred to as 'wimpy dame tears' before beating him with a hammer.

And there's the first chapter! If anyone is curious, my logic for Natsu was that he basically connected to Tsuna and sort of became like an Arcobaleno companion. Therefore his connection to Tsuna's Flames dragged him along when Tsuna was reborn. Unofficially though? Tsuna would totally get lonely without someone and this also gave him a defense.

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