Hi guys! This is the first fanfic that I've ever posted, but not the first one I've ever written. You don't want to see those.

"Dame-Tsuna, you got thirty two out of forty of these these wrong. Do it all over."

Tsuna stared at Reborn with a mixture of despair, shock and mutiny. He had been working on it for the past two hours! He heard a clicking sound and turned to face a gun aimed at his forehead. That was enough to shatter any possible escape plans.

Reborn smirked knowingly, making Tsuna sign in resignation. Before he could restart, though, a loud explosion rocked the house. Dashing to the window, Tsuna barely caught sight of bright orange light before it receded, revealing a small body. It was too dark to tell the details, but it wasn't moving. Was it dead?

Suddenly, Reborn landed on his shoulder with an odd glint in his eyes. "What are you waiting for? Go take a look."

Tsuna looked at him fearfully and said, "But what if it's dangerous? We don't know what it is!"

Reborn stared at Tsuna unblinkingly. After an uncomfortably long silence, he cracked under the pressure and exclaimed, "Ok, ok, I'll go!"

He stumbled down the stairs and opened the door. His mom glanced at him with a bright, clueless smile, but didn't say anything. Reborn waved at her and told Tsuna to hurry up.

As he approached the body, it came into clearer focus. The baby had wild brown hair and was dressed in a hoodie. Clutched in his hand was an odd orange box, and several similar ones were attached to his belt. However, the most prominent thing about this infant was as slight, still fading glow coming from…. a pacifier?

"I knew that light looked familiar." remarked Reborn, frowning.

Tsuna looked at him quizzically. "Is that an Arcobaleno?" he asked.

Without turning away from the unnamed infant, he replied, "He is. The questions now are who and why. The current sky Arcobaleno is supposed to be the boss of the Giglio Nero Famiglia."

The unnamed infant twitched in discomfort. A small, fuzzy chipmunk suddenly emerged from his pocket and crawled to his face, poking its nose at his cheek worriedly. It then stared at Tsuna and Reborn expectantly, as if it were trusting them to help.

"Well?" prompted Reborn, heeding its gaze. "Take him inside. He clearly needs to rest, and outside on the ground isn't a good place for that."

Tsuna looked at him disbelievingly. "Ehh!? We don't even know him! What if he's dangerous!"

"Do it or consider your workload doubled." Uncharacteristically, no smirk crossed Reborn's face as watched as his pupil grimace.

As Tsuna picked him up, the Arcobaleno twitched again, stronger this time. His brown eyes flitted open, staring ahead blankly. Seconds later, they were sealed shut once more.

It was dark, the sort of suffocating darkness that pressured you on all sides. It was here that a orange light flickered to life, borne from a radiant flame atop the head of a brown-haired boy.

He forced down his ringing premonitions, and studied his surroundings. It was completely empty, save for the sleek black floor.

Suddenly, he spun around, noticing colorful lights behind him. There, as if they simply materialized from nowhere, the Arcobaleno stood motionless, their pacifiers glowing brighter by the second. Then, just as suddenly, six of them were reduced to the damaged, grotesque, bodies of the once-Arcobaleno. Their lights were extinguished.

Tsuna gasped and collapsed in shock as he watched the bodies decay in fast-forward. No matter how much he desperately wanted to turn away, his body refused to listen.

One last yellow glow remained. Reborn walked up to Tsuna, face shadowed by the brim of his hat.

"Tsuna." He tilted his hat up, revealing an genial, unforced grin. "Thank you for being my student."

He picked off his hat and placed it gently on Tsuna's head. "And goodbye."

With that, his pacifier went out. The sky flame followed as well. It fizzled out, leaving only the behind darkness behind. He could feel himself sinking and shrinking until-

"No!"

Tsuna eyes flew open and he shot up, slamming his head on something hard.

"Ow!" Two cries filled the air as one head collided with another.

Tsuna shook the dazedness out of his head first and stared, eyes wide, at the taller figure, who was still wincing when he opened his eyes.

"Oww… why does this always happen to me?" He complained.

Tsuna, who looked like he had been frozen, had his eyes locked on him.

"Why are you looking at me like that?"

Slowly, Tsuna raised his tiny hands and rubbed his eyes. After blinking a few times, realization set in and his eyes began to dilate. "Y-you.. you're..?" he sputtered.

The voice of an infant drew their attention away. "What do you mean by that, sky Arcobaleno?" His tone was somewhat wary, but not unfriendly. Nevertheless, Tsuna's gaze snapped onto him.

It was silent for a few seconds before Reborn warned, "Don't even try to lie. I can tell. Who are you?"

Tsuna blinked, and with the steadiest voice he could muster, responded. "Tsunayoshi Sawada."

Reborn's eyes widened. Marginally, perhaps, but it was still there. It was the mark of a professional that he regained his composure so quickly. Redirecting the conversation, he said, "What should we call you? It'll be inconvenient if you were both referred to as Tsuna."

Tsuna responded in kind. "Naturally, it should be me who goes by a nickname. How about Cielo? It's simple and self-explanatory."

"Sky? It's a bit uncreative, but that doesn't matter." said Reborn. "Tsuna, meet our new roommate."

Tsuna, who hadn't uttered a word during the exchange, looked up. In a slightly indignant tone, he said, "Do I even get a say? It's my room!"

Needless to say, he immediately began shrieking when he saw Leon morph into a gun.