So, R27! :D This fic is held years after the manga, and Reborn's age is 27. Tsuna's 24.

On with it now!

The thing which propels into his room, conveniently shattering the glass, is shaped vaguely like a torpedo. Or a missile, but that's really not of importance. What is of importance, however, is the fact that his Intuition hadn't bothered to ring the entire time which is, considering past experiences, a very big surprise. Tsuna barely has time to duck as the missile/torpedo—which, on further last second hasty inspection, isn't as big as a torpedo/missile should be—clashes with his office table which is—thankfully, for once—devoid of paperwork.

The feeling of gratification doesn't last as long as it should have under normal circumstances; the pain which explodes throughout his entire body freaking hurts. Which is what pain is supposed to do, Tsuna will admit sometime in the future, but that's beside the point. The point is that Tsuna has never felt pain quite like this, and he has felt varying degrees of pain, what with having his right arm being cut off that one time thanks to an enemy Famiglia, only to be reattached by Ryohei and Shamal and also having stubbed his toe more than once.

But still. He has never felt anything quite like the pain he is feeling now.

'My body is crumpling,' he thinks, a little desperately, eyes fixed involuntarily on greenish smoke. He can't scream even though he wants to: he doesn't have a voice. It feels as if his bones are shriveling up, muscles being pulled taut, yet wrenched and squeezed at the same time. His head hurts, so do his eyes, his lips, his ears, his nose—his fingers curl backwards and he hears the familiar sounds of bones cracking.

And as abruptly as that, the pain stops. The abruptness makes him pause and stare at the ceiling with something akin to horror and fascination. And then he gets up without preamble; pain—light yet fucking painful—runs through his veins, bones, muscles and ligaments yet again, so he can't help but croak:

"Holy shit, what the hell happened to me?"

His voice comes out squeaky, which makes him repeat:

"Holy shit what the hell happened to me?"

And then he realizes how insanely naked he feels. How insanely naked he is.

Clothes—bigger than him—lie, pooled around his form. The sight makes his eyes widen, but he does not allow it to bother him just yet. He stands up, staggering ungracefully at how the world tilts, and curses. A small part of his brain castigates him about cursing which is insane, really, and more than a little bit odd since he has cursed quite expletively under his breath on various occasions, and no part of his brain has ever nudged him about it.

Realizing that he is getting a bit too engrossed in this particular train of thought, Tsuna manages to stand up on his two legs. The green smoke clears away, and he is met with the site of a broken desk and a world which seems bigger than what he is sure it should be. Or was.

He adds two and two pretty fast and comes to a panicked four. He stares at his tiny palm for a good two seconds, before rushing to the mirror in his office, only to stamp his foot in blatant annoyance when he realizes that, given his height, he can't reach the mirror.

"You're kidding me," he murmurs under his breath, grimacing at how childish he sounds.

He knows he is supposed to freak out over the current predicament so he does just that. He doesn't scream like his younger self would have, but simply freezes, eyes wide. This is not a favorable situation, considering who he is. He is the Neo Vongola Primo, for Heaven's sake; people are after him, after his life, after his family's life. Being stuck in a body of a toddler certainly won't help him to fend off his enemies, protect his family. The fear that seizes him makes it difficult for him to breathe.

Yes, Vongola is currently both a legal and a mafia syndicate, but that doesn't matter. It still has enemies. Sure, it is stronger and larger than what it has ever been, but people still want to eradicate it. Not every Famiglia is happy with the new and comparatively brighter road the Vongola has taken, not every Famiglia wants to see the Vongola prosper in the direction it is prospering. If his current situation manages to leak out, there will be chaos. People want him dead. People want him even deader than Xanxus does when the man is particularly furious, and that should mean something. Enemies will come, bombarding the Vongola mercilessly; despite knowing that his Guardians are enough to stop the attritions, one can never be sure. Battles aren't predictable, after all. One single, seemingly innocuous mistake might shatter everything, ruin and destroy countless of lives.

With admittedly morbid thoughts revolving ceaselessly in his mind, Tsuna takes a few seconds to realize Spanner's and Shoichi's entry. It is not until Shoichi is freaking out over him, repeating "Tsuna-kun!" hysterically over and over again, shaking Tsuna's smaller frame back and forth with more force than required whilst handling a toddler, that Tsuna snaps out of his reverie.

His gaze meets the bespectacled man's, and then Spanner's.

'They need me,' he thinks and calms down almost immediately at the thought, 'I can't panic.'

"Calm down," Tsuna says placidly, smiling gently.

Shoichi stops trying to behead him by shaking him like a rag doll. Spanner's tensed shoulders ease just a little, but that's enough.

"What happened?" Tsuna asks next, because details are important. They make a hell and heaven difference when in battles, after all. As Spanner starts, Tsua walks up to his fallen suit, fishing out the currently large, crisped shirt belonging to a brand Tsuna doubts he has any interest in knowing. He wraps the material around his form; despite the length and the obvious disadvantage of being unable to walk properly, at least he is not nude anymore.

"We're not sure, exactly," Spanner starts, sounding uncertain, "There was some technical glitch— perhaps, I am not sure, but everything went—"

"Tenth!"

At this exact moment, the door bursts open. Tsuna starts, nearly jumping out of his clothes (literally). Spanner and Shoichi yelp in morbidity, and Tsuna gives them sympathizing looks, promising without words that he will be keeping them safe from his Storm so no worries. Despite Hayato's sudden outburst which usually promises a string of curses when enemies are after Tsuna's life yet again, the bomber simply… pauses. And gapes.

Tsuna lets Hayato gape. Hayato's mind, the brunette feels, needs to get accustomed to seeing Tsuna as a toddler.

Hayato, evidently after having been accustomed, still doesn't say anything. Finally, the bomber sighs, walks up to Tsuna and scoops the brunette up.

"Is that you, Tenth?" Hayato asks slowly, gently.

Hayato uses 'Tenth' with a little bit of hesitation. Tsuna can only think of one reason for that—Hayato is trying to make sure whether Tsuna is currently the victim of the ten-year-old-bazooka-gone-haywire or something else entirely.

Tsuna nods, "Yeah, it's me, Hayato."

Hayato breathes out in relief. He then glares at the other two occupants of the room and, if it isn't for the fact that he is holding Tsuna securely in his arms, Tsuna has a distinct feeling that dynamites would be clasped in the other's hands now, Vongola Gear alive and kicking.

"Its fine," Tsuna says, fondly exasperated, "I'm fine."

Besides, the ones who are freaking out more than Tsuna at Tsuna's current predicament are obviously Hayato, Shoichi and Spanner. And Tsuna is pretty sure that it isn't because they are worrying over Vongola's fate in the future. It's a bit endearing, and it makes Tsuna feel safe, but not really something Tsuna needs right now.

Hayato's eyes soften, and the intensity of the glare reduces considerably. Spanner and Shoichi sigh in relief.

"What happened?" Tsuna asks the two, shifting uncomfortably on Hayato's arms, "You can put me down, by the way."

Hayato shakes his head firmly, "Not now. I'll take you to the bed first, Tenth. Speaking of, you need to rest—suddenly turning into a toddler must have been a shock to you."

Tsuna tries opening his mouth to protest, but a swift berating look from Hayato makes the brunette pause. Tsuna grumbles. He can't deny that he is shocked and more than a little bit sleepy; not because of the pain he had felt, but rather, he guesses, because of a side effect caused by his current predicament. Hayato looks satisfied at how Tsuna relents.

"I'll brief you on what has happened after asking the two. And I'll tell the others—"

"Not now," Tsuna interrupts. He pauses and says, "At least not to Rokudo, Dokuro, Takeshi and Ryohei-nii yet. They've been sent to their missions, and the last thing I want is for them to worry about me now," he sighs and leans back, resting his head against Hayato's chest. It's comforting, and though he'd rather spend the entire day in his Right Hand's arms, he knows that Hayato has work to do; Tsuna doesn't want to be selfish, after all. Shifting again, forcing his eyes to remain open, willpower battling against sleep, Tsuna continues, "You can tell the ones who are not on missions, though."

Hayato nods and then hesitates, "Even Reborn-san?"

Tsuna hums under his breath, "Its better if he sees the situation I am in while I am awake. I'm pretty sure he won't be too pleased and that's the last thing anybody wants when Reborn is concerned. He's going to come back by six, right? Hopefully I'll be awake by then."

Hayato nods again, making sure that his hold on Tsuna is firm. He gives a stern look towards Spanner and Shoichi which makes Tsuna shoot a warning 'stop bullying them' look.

"Find out what happened. I'll be hearing from you two later," Hayato says.

"Of course," Shoichi agrees. His eyes dart towards Tsuna, guilt ridden, "I'm really sorry, Tsuna-kun."

Tsuna shrugs and waves his hand. He is aware (from Spanner's little chuckle) that the arm-wave looked ridiculous since the sleeves of his shirt, draped over each arm, are too long; though Tsuna would have normally given a petulant huff at that, he feels too sleepy to even care.

He slides his eyes close.

Given the sheer need to sleep forever and ever, Tsuna is a little surprised when he wakes up after merely four hours of sleep. He sees the ceiling first, then the unmoving fan and then, finally, Maria, one of the maids, standing by the side of the bed. For a second he kids himself to believe that his body turning into a toddler's was nothing but a dream his stress laden brain had fabricated, but his Intuition lightly reprimands him for having such childish thoughts. Tsuna glares a little at the ceiling, and then sighs.

"Maria," he greets, yawning.

Maria's response is hesitant, "…Decimo?"

"One and only and I think I've told everybody to call me Tsuna," Tsuna says with a smile, sitting up. Pain shoots up and down his entire body, and he yelps.

He clamps his mouth shut, eyes wide at the sudden response to pain. He has easily gone through much worse, so why is he yelling now?

"Are you alright, Decimo?" even whilst asking this, Maria already has a hand on his back, evidently trying to make him relax. Tsuna vaguely registers how large Maria's hand is against his back.

"I'm fine," Tsuna breathes out, "I'm not used to this body yet, I guess."

Maria nods, enquiring, "Would you like me to make something for you, Decimo?"

"Tsuna," Tsuna insists, "And if you don't listen to me, I will fire you."

"Will coffee be alright, Decimo?" Maria asks, ignoring Tsuna's insistence.

Tsuna stares at her and then grumbles lightly under his breath, "Doesn't being the Boss mean anything here?"

Maria chuckles a little under her breath, heading towards the door of Tsuna's room, "Coffee it is, then."

Tsuna watches her go, straining his ears. Once he can't hear her receding footsteps anymore, Tsuna hops down from the bed, landing on both feet uncertainly. Pain shoots up the limbs, and though the urge to scream arises, he refrains, shutting his eyes in annoyance. He takes a step, then another and another, wobbly, unsure, cursing under his breath when he loses his balance and falls, face-first, as an undignified heap on the ground. He uses his arms to pick himself up, sighing in frustration, only to land on his back.

Great. Not only is he super short, he can't even fight since he can't fucking walk.

'If something happens,' Tsuna thinks, 'what the hell will I be able to do?'

Before he can muse some more, the door creaks open. Without even having to shift his gaze from the ceiling, Tsuna knows that the people who have arrived are Lambo and Hayato.

"Woa, Hayato-nii, you weren't even kidding," Tsuna hears Lambo inform Hayato. As an afterthought, he adds, "You're tiny, onii-chan."

Tsuna manages to get up to his feet. Hayato immediately seizes him and puts him gently on the bed; Tsuna can't help but feel embarrassed. Not only does he resemble a toddler, he's being treated as one already.

"Of course I wasn't kidding," Hayato says in an offended manner.

He has every right to be, Tsuna muses, given how Hayato is…well, Hayato.

"Lambo," Tsuna greets his younger brother with a happy smile. He hasn't seen Lambo for two days now, seeing that he had been on a mission in South Italy. Tsuna can't recall which place, exactly, though, which is a little worrying given his mother hen tendencies.

"Hey, onii-chan!" Lambo greets him jubilantly, smiling widely. He grabs Tsuna by the waist and lifts him up into the air, ignoring Hayato's hissing protest and Tsuna's gasp of surprise.

"Lambo!" Tsuna all but shrieks (and then winces at the pitch of his voice), horrified, because nobody has ever done this to him. His father had never been home, too busy doing clandestine operations to bother with anything, and his mother never had enough time to play with him, busy taking care of the house thanks to Iemitsu's constant absence from their lives. Besides, Tsuna had always been an introvert, even as a child.

That aside, Tsuna's twenty four now and being lifted up into the air is embarrassing.

"Aw, you look so cute!" the fifteen year old exclaims, "What's your age now? Five? Six?"

"I think six is correct," Hayato almost snaps, hastily (yet gently, because it is Tsuna) prying Tsuna from Lambo's grasp. He lays Tsuna gently on the bed, tucking him in, ignoring Lambo's pout.

"Do you want to rest, Tenth?" Hayato asks.

Tsuna shakes his head, yawning and stretching.

"Not really," the brunette says, "I don't feel tired. Much."

He lies back on his bed as Lambo takes a seat near his legs.

"You look cute," Lambo acknowledges, "Not as cute as me when I was six, but close enough."

Tsuna gives Lambo a dry smile, unable to hide a laugh a moment later.

"Of course I don't," Tsuna says.

"Hardly," Hayato interrupts, "Tenth looks far cuter than you, you idiot. You were a snotty brat. Not to mention loud."

"Yeah, look who's talking," Lambo drawls.

"Shut up," Hayato scoffs, "You were the shrillest kid in Namimori. I was fourteen—a guy can't be shrill when he is fourteen, you idiot."

"Onii-chan was shrill when he was fourteen, Hayato-nii. Weren't you, onii-chan?"

Lambo has a point. Tsuna had hit puberty pretty late, leaving him with a shrill voice (only when compared to other boys his age) during the majority of his teenage years. Puberty has, evidently, done wonders.

Tsuna nods but adds, "But I was an exception."

"See!" Hayato says gleefully, "Even the Tenth agrees!"

Tsuna isn't sure what he has agreed to, but his thoughts come to an abrupt halt when Maria enters the room with a polite knock. She has with her a tray upon which is a cup of coffee. Since the entire staff is aware how Tsuna prefers his coffee— warm, with a single cube of sugar—no separate bowl is present with cubes of sugar.

She comes and places it by Tsuna's thigh. With unconcealed glee, Tsuna grabs at the handle of the cup. He tips the cup to his lips, only to have it snatched away from him the moment the liquid nearly touches his tongue.

"Hayato!" Tsuna protests.

"No can do," Hayato says, placing the cup on the tray and handing it back to Maria. At her and Tsuna's bewildered expressions, Hayato explains, "You're six, Tenth. Biologically speaking, of course. I'm not sure it's safe to consume coffee at such a young age."

"Of course its fine!" Tsuna says hurriedly, making a desperate motion for the cup, "Give it back to me, Maria!"

"I think Mr. Gokudera is right, Decimo," Maria says contemplatively.

"No, no, he's wrong! Terribly wrong!"

But Maria is already exiting and Tsuna wants to shriek. Not only is he a kid, he can't even have coffee!

"Hayato, I order you to allow me to have coffee," Tsuna says sternly.

"That's not going to work on me, Tenth," Hayato says, smiling a little, "You know it won't."

Of course Tsuna knows that. It still doesn't hurt to try.

Lambo, whose eyes are bright and twinkling with barely concealed amusement, suddenly bursts out laughing. Tsuna offers him a half hearted glare, pouting.

"This is not fair," Tsuna murmurs.

"What's not fair?"

Tsuna recognizes the voice. How can he not? Its deep and almost unconsciously salacious and terribly tempting and if Tsuna hasn't been busy and used to hiding his feelings from Reborn for almost a year and a half now, he is pretty sure he would have blurted something along the lines of 'I love you' or 'You're really sexy' or 'I really want you' by now. As it is, his heart, traitorous that it is, skips a beat and his stomach is filled with familiar yet unhelpful butterflies.

He's not even surprised at his own reaction. It has been a thing with his body for a pretty long time.

At least he has mastered the art of not blushing. It's a good thing that he is good at pretending to be phlegmatic when situations call for it.

"Reborn!" Tsuna greets with a happy grin.

Reborn pauses for barely a second by the door, eyes widening a little in surprise. To anyone else the twenty seven year old looks nonchalant as he saunters in, but Tsuna has known and has been beside Reborn to recognize unobtrusive little differences.

"I'm a kid," Tsuna says, gesturing towards his own body, "Surprised?"

Tsuna does not even bother to dodge the boomerang Reborn sends towards him. Again, he's pretty used to it.

I should probably mention this—nothing…well, expletive is going to happen between Tsuna and Reborn whilst Tsuna is a kid because I'm not fond of shota (even though mentally speaking Tsuna's twenty four and all). Like, at all. Hell, there won't even be kisses or anything of that sort while Tsuna's a fluffy little six year old.