This is a challenge from DragonLord577. Basically a D. Gray Man Naruto crossover. If you look for DragonLord, you'll see the challenge I mean.

Chirp. Chirp, chirp. Chirp

One thousand birds, eh? Naruto thought internally, smiling sadly through his sharpened fangs. Chidori.

Sasuke looked up at him, red eyes twisting and spinning madly, and smirked. "SHOW ME YOUR POWER!" The crazed boy screamed.

"You've fallen far, Sasuke." The blonde murmured, chakra ears waving quietly, fire gently licking the golden-blue rasengan he was forming. Red slowly bled into the pure mass of spinning chakra, giving it a more potent feel. The rasengan, the Yondaime's proudest work, rested in his palm like a weight, filled with golden fire, Kyuubi chakra and his own blue chakra. Naruto admired it, and Sasuke let him do so. Then his head snapped up, and Sasuke knew what was going to happen.

They lunged simultaneously, palms outstretched with the techniques they'd been battling each other with for as long as they'd known each other. Rasengan, spinning, graceful, silent and deadly. Chidori, crackling with energy, powerful, loud and intimidating.

The techniques met, and the two responded by pushing forward, trying to gain leverage against the enemy. They struggled, two seventeen-year-olds locked in a battle to the death. For a moment, onyx met blue, and onyx noted the coldness they'd never seen before. And Sasuke knew, that this time Naruto would not aim for his headband; Naruto would be aiming to kill, not because of him—but because of the things he'd done.

An enormous, giant navy light erupted from the two techniques, and any smart ninja would've pulled away, or ran away. The two wielding the chakra-weapons, however, ignored it, so focused on defeating each other.

The last thing Naruto remembered from this world—or even, the last thing Naruto saw of his own world for a very long time was a thousand silvery-white birds preparing to take flight.

"My, you two have been causing trouble…" A cheerful voice said, and laughed a pleasant, sweet laugh that sent shivers running up Naruto's spine. "Now, what to do with you…?"

Naruto tried to move, tried to twist and see who was talking, but was quite surprised to find he couldn't move. Panicking, he opened his eyes only to encounter a deep blackness, the darkest black he'd ever encountered. He knew he should've been terrified, but to his surprise he was vaguely comforted by it.

"I can't send you back, no…perhaps…yes, I think that'll do! Maybe I'll let you return home, someday. Maybe."

Allen walked along, a cheerful bounce in his step as he held the loaf of bread close to his chest. He was so happy today! Mana had given him a pair of gloves to wear and a long shirt, so no one could see his ugly, deformed arm; he'd actually gone shopping today, and no one had yelled at him, or called him a freak or anything!

Waving at the random passerby's, he beamed into the bread. This was probably the best day of his entire life! He had a father, he had good food, he had a home, and he had his gloves! Who could ask for anything more?

Even if Allen didn't ask for anything more, he got it.

A giant flash of navy light erupted from an alleyway, shocking Allen and making him land on his backside. The light disappeared as soon as it appeared, leaving Allen wondering if it had ever been there in the first place. Shrugging, he got back to his feet, (not noticing that no one else had seen the light and a few people were giving him odd looks) and hurried over to the alley to see if anything was actually there. What he saw shocked him.

A small blonde boy rested against wall, hair already beginning to droop in the rain, though it was obvious he hadn't been there long. Three whisker-like marks adorned the boy's two pale, thin cheeks. His white shirt had an orange spiral on it, which had been dry, but was quickly becoming soaked. The blue pants he wore had more patches and holes than the original cloth. He wore no shoes.

Allen looked up and down the alley, trying to see who might've dropped him off. Shrugging, he shook the boy quietly, trying to get him to wake up. The boy let out a moan, and shifted slightly. Smiling, Allen said softly, "Please wake up. It's not safe to sleep in the rain."

The boy's eyes fluttered open, displaying two bright blue eyes, which were currently dulled by sleep and discomfort from the rain. His mouth opened slightly, letting out a soft, "Wha…?"

Allen knelt down and grabbed the boy's arm, trying to lift him from his sitting position against the wall. While he was lighter than he appeared, Allen still couldn't quite lift him. "Please get up, I can't carry you." Allen whispered to the boy, shaking his shoulder again.

"Nnn…" The boy moaned.

"Not helping!" Allen growled, a bit of his old personality showing through.

"What's this…?" A low voice asked from behind, and Allen jumped and looked up, a grin slowly splitting his face. "Mana!" He cried, leaping up and hugging his adopted-father's leg.

Mana chuckled, patting Allen's brown head, before turning his attention to the little boy lying against the wall. "What did you find, Allen? Who's this?"

Allen giggled, feeling his spirits getting lifted just by the appearance of this father. "I was a-walking down the street with the bread, and there was this flash 'a blue light! I followed it here, but he's not waking up."

Mana knelt down the touched the boy's forehead, and noted that he couldn't be much older or younger than Allen. The boy's head was clammy, and his face was pale and thin, but it was obvious that he hadn't been there for more than a few minutes. Sighing, he gently gathered the surprisingly light boy into his arms and gestured for Allen to follow, which he immediately obeyed, following his father almost like an obedient puppy dog.

The streets were clearer, more people going inside to take shelter from the rain, and for that Allen was happy. He still didn't like big crowds.

As they approached the circus they were currently working for, the little boy stirred in Mana's arms, and panicked as he felt himself being moved and carried. Then he relaxed and just looked up into Mana's face curiously. "Kon-Konichiwa." He murmured shyly. Mana blinked in surprise; what was a little Japanese boy doing in London?

"Watashi wa..." The boy began, and started to look confused. "Ah…"

Mana pointed to himself, knowing the boy probably wouldn't understand English. "Mana." Trying to remember the word for 'English' in Japanese, he took a stab at it. "Igirisu?"

The boy's face slowly brightened in understanding. "English!" He said in a heavily accented voice. "He…llo! I am…I…am…" The boy got the confused look on his face again, almost panicked. "I don't…know." Though it was garbled and the message was wrong, Mana understood; he didn't remember his name.

Mana nodded. "Why don't you choose a new name?"

The boy was confused, and tilted his head in frustration as he searched through the meager English he did know. Mana elaborated. "Pick, choose name. You pick name." He said slowly, and this time the boy understood. His face crinkled, and his eyes narrowed in concentration. Finally, he smiled and said, "Kitsune!"

Mana nodded. "Fox." He translated.

Kitsune tried out the word. "Fox…Mana. Otou-san?"

Allen stared at the two in confusion, wondering what he was missing.

Komui Lee sighed and rubbed his eyes, glaring at the paperwork. Oh, it was the bane of his existence, that paperwork. Oh well. No sense in putting it off, or the higher-ups would be really pissed with him later. Besides, when he was done he could see his adorable little Lenalee! Picking up his pen and writing furiously, he had only finished the first four pages when a man burst into his office (shocking him and making his pen swerve) and shouted, "Mr. Lee, sir! A child just showed up outside the doors—in a flash of blue light!"

Komui leapt up, happy for the distraction, and snagged his coffee in one hand before following the man to see exactly what had happened. As they approached the doors, Lenalee (so cute!) ran up to him, her short pigtails bouncing and chirped, "He's awake, brother! About my age! He's Japanese, so I got Kanda to talk to him!"

Komui nodded, smiling widely at his little sister. "Good work, Lenalee!"

As they approached, Kanda looked up from the boy sitting stiffly on the floor, and slowly rose to his feet. "He's got memory loss." Kanda snorted. "Said he'd call himself Hebi—snake." Kanda rolled his eyes, obviously annoyed with having to translate for a bunch of idiots.

Hebi looked up when his name was said, looking confused and weary. He had to admit, Komui knew the kid would be a looker when he got older.

"Is he compatible?" He asked, taking a step closer to Lenalee (just to make sure Hebi knew not to get involved with his adorable little sister). One of the finders nodded. "It's on his neck, though it looks real strange. I don't think it's normal."

Komui's eye twinkled in excitement. Maybe…just maybe, they'd found the heart.

So...here it is. First time ever doing a crossover, so I'm a little nervous! Hope you guys like it!

Silver Writing Bug