Disclaimer: I do not own KHR, never have and never will. This also counts for every single chapter that comes after this, so I don't have to repeat this.

Happy reading! :D

Chapter 1

With Pain Comes Marshmallows

"Ow..." Tsuna felt it again, the searing pain in his head. He gripped the back of a chair for support, clutching his head as he waited for the pain to pass. Only, unlike the other times, the pain didn't die down. It didn't even after what was five minutes in reality, but seemed like years and years to Tsuna (years of torturous, head-splitting pain, goddammit).

"Shit," he cursed under his breath as his migraine not only refused to die down, but instead intensified. The hell, it's been a few minutes already, why won't you just go away like you usually do?!

It had started off innocently enough. Just a slight headache, which he attributed to stress and/or one too many knocks to the head from Reborn. Yeah, more likely the latter. But over the past few weeks it had intensified in both frequency and severity. No amount of Panadol or any other form of painkiller worked. Neither did soothing music, herbal tea or incense. All that had got him was weird looks from the cashier at the convenience store. Not every day you see a seventeen year old teenage boy buying lavender tea and candles.

Oh god, I'm turning into a girl. He grimaced at the thought. Getting vulgar too. I don't usually curse. But hell is this painful.

Suddenly, there was a sharp, burning spike of pain, causing Tsuna to gasp in surprise and his knees to buckle. He felt himself quickly sinking into unconsciousness, his poor body unable to withstand the hellish throbbing.

Shit, shit, shit. Damn Reborn. If this is his fault I am so going to hunt him down and slaughter him, crazy-ass tutor from hell or not. Tsuna's thoughts were uncharacteristically fierce as his mind went black.

Somewhere, a certain arcobaleno sneezed.

"Are you really sure about this? I-"

"Haha, of course I'm sure! It's such an amusing game I've thought up, now, isn't it?"

"It's not a game! Take this seriously! Do you know how much trou-MPFH!?"

"Ne, lighten up Shoichi-kun. Here, have a marshmallow!"

*cough**splutter*

"There there, you see? Marshmallows make everything better! Ah, that's right, can you go order another hundred packs for me? I think I'm running out."

*cough**wheeze* "Running out?! We just had a shipment five days ago! Wait, don't change the topic like that! Do you even know the risks of travelling through-STOP HUMMING THAT STUPID THEME SONG OF YOURS, GODDAMMIT!"

"Uwa, Shoichi-kun got pissed!"

Ran ran, ran ran, ran ran, Byakuran!

Tsuna woke up to an unknown finger poking his cheek.

Firstly, he had realised the dreaded pain was gone, much to his relief. Then, slowly, he had become aware of a slim digit poking his left cheek repeatedly, and some happy giggling in the background.

Naturally, the young Decimo (who was still dame in all sense of the word) promptly screamed and shot up, flailing his arms in an attempt to distance himself from the owner of said appendage.

"Ne, ne, Tsu-chan's pretty lively!"

Upon hearing the familiar cheerful voice, his whole flailing body froze. Slowly, he looked up, half in hope and half in dread, to meet the gaze of a certain Byakuran Gesso.

Tsuna went into panic mode.

"B-b-byakuran! What are you doing here? No, wait, where the hell is here?" He practically screamed as he finally got a good look at his surroundings. The room (or space, or whatever) was completely, utterly pitch-black. There was no light source as far as Tsuna could tell, but he could see Byakuran in front of him as clear as day. He looked down and gulped.

His whole form was transparent, like his body had defied scientific logic and decided to become a solid form of water (or something. Tsuna never was that good at science) . He shakily raised his hand up, holding it out in front of his face and peering at it intently. Or rather, not exactly peering at it, but peering through it. "And what the hell happened to me?!"

Byakuran simply ignored his frantic screaming and smiled at him mischievously. "Now now, suddenly Tsu-chan has lots and lots of questions to ask! Tsu-chan really is so cute!"

"Wha?! Wait, you're not answering any of my questions-HIIIEEE!" Byakuran, having gotten bored of Tsuna's blabbering, decided to pour his whole bag of marshmallows over the poor Decimo.

"Now, now. Calm down, Tsu-chan. Here, have a marshmallow. Now, listen up, 'kay, Tsu-chan? This," he gestured to the wide encompassing space of black (and black, and more black) with a grand sweeping motion. "This place is kinda a...connector, you would say? Yes, I guess you could call it that."

"Connector?" Tsuna was bewildered. This was getting ridiculous. At least Reborn's training sessions held some semblance of common sense. Somewhat. Ok, now that he thought about it...

"Hai, a connector between two parallel worlds." Byakuran remarked casually as he started building a tower of marshmallows.

Tsuna's jaw dropped. Parallel worlds? Wait, how could he say such a thing with that stupid goofy smile of his?

"Ne, you looked shocked Tsu-chan. Not to worry, the thing you're about to do isn't as life-threatening as the whole time travel thing you guys had. I hope."

Tsuna groaned at the memory. "What do you mean you hope?"

"Well, Shoichi-kun's part of the plan this time, so it shouldn't be too bad, right?" Tsuna groaned again. That didn't account for anything!

"Anyways," Byakuran started juggling his marshmallows. "You're gonna go there to train some really interesting people."

"Train?"

"Don't worry, you're going to have lots of fun! I assure you you'll find them very amusing," Byakuran giggled and popped a sweet fluffy treat into his mouth. "Well, if you fail, Vongola in that world is basically doomed to perish, so you better do a good job, ne, Tsu-chan?...Hello? Tsuuu-chaaan?"

Tsuna, who had started seeing multiple Hibirds flying in circles around his head, abruptly snapped out of his reverie. "Huh, what?"

"Well, that's it for me! Hope you have lots of fun there Tsu-chan! Shoichi-kun and I are gonna have a blast watching you guys!...Well, maybe not Shoichi-kun..."

"Huh?"

"Ciao!" And with a cheerful wave of Byakuran's hand, the ground below Tsuna cracked and shattered into hundreds of shards, and Tsuna fell through the hole screaming his lungs out.

Oh dear...they all turned out extremely OOC ._. I think I need more practice, but ah well. It's my first multichapter fanfic for KHR. It's my first multichapter fanfic for anything, actually, so I'm really excited! And I know, I know, the idea is kinda unoriginal (ok, really unoriginal) but I'll be taking pains to make it more unique later on, so watch out for later chapters!

...or I could end up failing epically, but watch out anyway.

Regarding the timeline this takes place in, it's probably when Tsuna and the gang are around 17 or 18, in high school. Somewhere there. As for the timeline in the parallel world, you'll just have to wait and see :D (that's code for: I haven't decided yet).

R&R!