At Namimori

"I'm home!" says Tsuna, as he opened the door to his home and stepped in, "-sigh- Finally, it's the holidays now!" He yawned and stretched as he did. He began walking up the stairs which led to his bedroom when he noticed that the familiar 'Welcome home!' was not heard from his mother today.

He quickly walked backwards down the stairs and poked his head out to check on his mum, who usually is in the kitchen. "Hmmm, mum's not there today, maybe she's doing the laundry." Tsuna looked all over the house but could not find her. 'Maybe she's out shopping,' he thought but his super intuition told him otherwise. 'She is somewhere else. Her disappearance is going to affect you. Don't worry, she's somewhere safe. Reborn would explain,' it told him all at once. It has never been wrong so he decided looked for Reborn. By then, he was in front of his bedroom door so he checked in his bedroom first.

He slowly opened the door, expecting a small cow with some pink bombs to throw some at him. It was his normal reaction, nowadays. Instead, he saw no-one but a familiar figure the size of a baby wearing a tuxedo sitting calmly on his bedroom floor with a bubble coming out of his nose.

"Oi! Reborn!" Tsuna shook Reborn to try to wake him up, "Where's mum? …Lambo's not here either, nor is Ipin or Fuuta, and Bi–" Tsuna slowly turned his head towards his bedroom door, half expecting a woman with long pink hair to bring in a plate of purple cookies. He nearly sighed in relief when he remembered seeing nobody when he searched the whole house. He turned back to Reborn and resumed trying to wake him up.

Finally, the bubble popped and Reborn turned to face Tsuna. "Calm down, No-good-Tsuna. Mama and the others are at a camp I organized for them to go," Reborn explained.

"What? Why?" From experience, Tsuna knew that these camps usually meant training and fighting, and that wasn't a good thing.

"Well, you're going to train–" Well, Tsuna anticipated that. "–at another world." If Tsuna was drinking a glass of water, he would've spat it out all over Reborn (that definitely would've angered him. 'Phew, thank goodness that didn't happen,' Tsuna silently said to himself). Tsuna definitely didn't expect that.

"WHA–" Right then, Tsuna fell back and clutched his face in pain as he digested what just happened.

"Be quiet and listen, No-good-Tsuna, or I'll kick you again."

"H-hai, Reborn!"

"Good. The whole Vongola Family would go as well. You'll go to that world via a new bazooka Giannini invented. We're not sure whether it'd work but we figured that you guys would get split up all over that world, second-worst case scenario."

"Heh?! You're not sure whether it'd work or not! I could die you know?"

"Good going, Tsuna. You guessed the worst-case scenario; all of you would die."

"WHAT!" Showing no emotion on his face, Reborn reached for the chameleon sitting on his shoulder as it transformed into a green pistol. Reborn picked it up and pointed it at Tsuna, obviously impatient.

"Be quiet or I'll shoot you." At this, Tsuna immediately shut his mouth. "Ok, continuing on. If you guys do get split up, as the head of the family, would have to travel around that world and try to find them. You're super intuition will tell you when they're nearby."

"Ok. So, Reborn, what do we do after?" Tsuna asked cautiously, hoping that he won't anger him again.

"Your mission is to capture a super villain named Custin. His family is called the 'Cristinga Famiglia'. They rank themselves into A leveled soldiers, B leveled soldiers, etc. A bit like Milliefiore but this Family's soldiers are far stronger. An A-rank soldier from the Milliefiore Family would equal a D-rank soldier in this Family." Tsuna could do nothing but gape at Reborn. Reborn slapped his face with a small pile of A4 sized papers. "Oi, No-good-Tsuna, are you even listening?"

"O-of course, Reborn!" Tsuna returned to this world but the surprise didn't leave his face.

"By the way, No-good-Tsuna, what is with these extremely low test marks; 26, 27 and 32?!"

"A-a-a-ah, Reborn! I-I-I –"

"-Sigh- Never mind, I'll have to give you some extra training after you come back from this training session." Though Reborn sighed, his eyes didn't change at all, they didn't even blink.

"WHATTTT! A MERE TRAINING SESSION! MY LIFE IS ON THE LINE YOU KNOW!"

"I'm not going to help you with anything during this training session, but I will tell you these tips: One, be careful. An A-rank soldier can be on the same level as Hibari." Reborn continued as if nothing just happened, while colour left from Tsuna's face and he just trembled more violently than before. "Two, Custin's fighting ability actually isn't really good, but that guy is extremely tricky. He plans ahead, and thinks of all the possible outcomes, predicts what will happen, then he interferes with what was supposed to happen, to change it."

"Does he use the mist attribute like Chrome and Mukuro-san?"

"No, it's like playing a game of chess but in real life."

"Then what flame attribute does he use?"

"He doesn't use a flame. He uses shadows."

"….heh?" Tsuna tilted his head and blinked blankly.

"We don't know too much about him, but even Uni's mother, Aria, fell for his teacher's most simple tricks, but with your super intuition, you may be able to avoid a bit of that. That is my third tip; listen to your super intuition."

"Shadows? Does he use them like how we use flames?"

"No, we only know that he can change his appearance by covering himself with shadows, but we're not too sure what else he can do."

"And his fighting skills are 'not really good'?"

"They're not; you are just unfamiliar with them. But because of this unfamiliarity, the whole reunited Vongola Family may be just enough to defeat him."

"'JUST ENOUGH!'" Tsuna nearly flew into panicked rage but a question crossed his mind, "Reborn, how do we come back?"

Reborn handed Tsuna a piece of paper. It was folded neatly but it looked quite yellow, and somewhat…old. "You will tie him up with a magical whip, and chant these words. He will come to this world, and we will take care of him."

"What about us? And how do we find the magical whip? Does magic even exist?"

"You'll find out soon enough. Everything will make sense when you go there…a world where magic actually exists." As Reborn said this, he reached behind him and took it out, he held it above Tsuna's head. Before Tsuna could react, Reborn lowered the bazooka so it covered Tsuna entirely. "Good luck, No-good-Tsuna." –BOOF! – and Tsuna was gone.

Just then, a man tall man with black hair, who was leaning on the wall outside Tsuna's bedroom, stood up properly and entered the room. "Reborn-sama, so you sent them?"

"Yes, I sent the others before Tsuna. I explained briefly about their training."

"So I can start making preparations?"

"Yep, make sure your boss doesn't kn–" Before Reborn could say any more, the man disappeared. "-sigh- he really shouldn't travel between worlds too much, he really should save up more energy to fight, he'll run out in no time…or…is that what he wants to do? I see." Reborn smiled to himself as he decoded the man's words.

In a forest, in a different world:

Tsuna's POV:

Ouch. My body hurts all over. The ground is so spiky, so I must have been lying on grass. I opened my eyes slowly, squinting, trying to stop the sunlight from blinding my eyes. Unable to see anything but trees and white (the sunlight), I decided to sit up to change my views. And what I saw from that levitated part of this world, was beyond my wildest imaginations.