Hidden Genes

Summary: There is a type of jutsu only one shinobi could use,the Shodaime became famous for it being impossible for anyone who doesn't have his DNA, and even then it was rare. Sharingan is an Uchiha doujutsu,so no one can have it unless an eye is given, so why does the Kyuubi vessel have both?Why does he move like the Yondaime?

Naruto made it back to his teammates only the next morning at dawn, having spent the night in some ditch of a bush, unconscious and thankful to Kurama for healing his wounds while he was out. That was the second time in two months that he got his chest pierced and it hurt like a bitch. He was really lucky to be born the way he was, with these strange abilities, and to have Kurama sealed into him not an hour after he was born. Had it not been for his Sharingan to help him twist out of the way of a few very sharp branches or his Mokuton, which he ultimately used to form a big, plushy, cushion of a bush to land on, or Kurama's enhanced healing properties and the chakra cloak or his own clan's strong blood that helped him heal so quickly, he would have been dead now, not limping, battered and bruised and hurting as all hell but still alive.

Of course, seeing the confrontation going on in front of him now, with Ino, Chouji and Shikamaru in a shit position, Sakura bruised and battered and Sasuke casually breaking the arms of one of those Otogakure genin while giving off a sickening dark aura, made the blond Uzumaki question if it would have been better if he had simply died. Because that aura ... it was madness. It was evil given a feeling. It made chills run down Naruto's spine and even Kurama was disgusted by it, by that strange, sick killing intent that was coming off of his friend in waves.

Naruto had never been more worried in his life than when he sensed Sasuke's current state of chakra. It was almost like rotting and it grated on Naruto's senses worse than any foul smell could on his sense of smell. It was every senor type's worst nightmare. It made Naruo's stomach roll and churn in disgust.

And it was coming off of his most important person.

Never before had he cursed his nature as a sensory type as he did in that one moment. The feeling was far too oppressive and he felt sick as he was forced to endure it while Sakura desperately tried to make Sasuke stop. Had Naruto not been there to physically stop the other boy before he could do it, Sasuke would have plunged a kunai in Sakura's own gut before he finished off the last remaining conscious Sound ninja and maybe Ino, Shikamaru and Chouji, too, if he hadn't sated that strange blood lust coming off of him in waves.

Naruto, get out of his way if you're not planning on fighting him, Kurama commanded from inside his head, his nine tails slashing anxiously inside the space he occupied. Usually the fox was lounging around even when Naruto was fighting, as he knew that Naruto can defend himself against much stronger opponents than Sasuke if he wanted to and was as such confident they would win and would just relax while giving instructions or adding his own chakra to Naruto's when it was needed. This chakra, this darkness ... I have felt it only twice in the past and both times it had been turned against someone of your bloodline.

'Are you talking about Madara?' The confused blond asked even as he held strong while Sasuke struggled against him, renewing his attempts to kill someone and it didn't appear to matter who anymore. ''Sasuke, snap out of it, you teme!''

''Get out of the way, Naruto,'' came the dead cold reply as the Uchiha pressed harder, the maniacal grin and mad light in his eyes sending shivers down everyone's spines. Naruto could clearly sense the fear coming off of the other genin and the last remaining Otogakure nin looked too frightened to even dare trying to run.

''No!'' The blond insisted, taking out another kunai when Sasuke tried to attack his unprotected side with another of his own. Cursing their close proximity and the lack of a mist or smoke or anything that would help him hide his eyes, Naruto settled just for Kurama's enhancement of his sight, as well as his other senses and reflexes, mourning his current situation for not being able to use his Sharingan. He could have easily predicted Sasuke's moves that way and reacted accordingly, but as it was, he had to fight like he usually did. He lamented that he had very little affinity towards genjutsu, as well, for if he could have just used his Sharingan, his Mangekyo, for a fleeting second, Sasuke would be knocked out by now. ''I won't let you do this! I won't let you hurt our friends or, even worse, become like that creepy snake dude-chick!''

''Then I'll move you out of the way myself.'' Naruto watched in panic as the black designs, not unlike fire, traveled further across Sasuke's skin, red as lava before settling in.

Naruto, this is far worse than with Madara! Kurama finally snapped back to the orange clad ninja's earlier question. Madara's madness was his own, caused by grief and loss. Sasuke's current state is affected by that cursed seal on his neck!

'Cursed seal?' He asked even as he ducked Sasuke's kick aimed at his head, falling into a crouch and automatically slipping into an ancient kata rare few even still remembered, body twisting and turning with ease, although he wasn't nearly as fast as he would have liked with the lack of Sharingan's perception. Still, Kurama's chakra was coursing through his body, enhancing everything he did, so he was still plenty faster and stronger than Sasuke, despite his smaller size. But the Uchiha had the advantage of the Sharingan and he had only recently started using it to predict movements instead of just reading and maybe copying them but he was doing rather well. Must be his genes instinctively telling him how to use his Kekkei Genkai, a knowledge he was sort of born with while Naruto had to learn by help of Kurama and despite how much the biju knew about it, Kurama was still not a Sharingan user himself and so he couldn't really help as much as Naruto had needed it, at times. Naruto had learned everything through experimentation and curiosity, with Kurama's help, but some of those experiments had left Naruto exhausted for a couple of days despite his stamina and chakra reserves. Those discoveries he's made in his own abilities and limits served him well but he would have still preferred not to lie exhausted in the middle of the forest, close enough to regular patrol routes that any of Konoha's ninja might stumble upon him and it could have been just his rotten luck if he were to be discovered in such a state by someone who wanted him dead.

He grunted when he blocked Sasuke's kick with his forearm, the strength of the impact making him drop the kunai in that hand. He jumped back just at the last second to avoid what would have been a critical gash to the chest. He thanked his lucky stars that his reflexes were still as sharp as ever but he knew this fight couldn't continue on like this. The strange markings on Sasuke's skin seemed to be about to spread again and he doubted he could stop him now without revealing at least one secret in front of his old teammates or alerting every shinobi in the surrounding ten miles to the fact that their village's Jinchuuriki can use the deadly power that was sealed into him at birth. That would be the end of his life, not just as he knows it, but just the end. They would kill him, no matter if the Hokage himself stands before him as his shield.

Yes. It's forcing his chakra reserves to grow so it can feed itself on its victim. But it is consuming a lot faster than his chakra is growing. Unless you make him snap out of it soon, he'll die, kit. He'll die and you and Kakashi will be the last two remaining Sharingan users in the world, neither of you able to pass on the ability.

'I think you're forgetting about Itachi,' Naruto countered but changed his stance, going on the offensive instead of just defending himself. The aggressiveness of his stance - a form best used in situations like this, when he was relying only on Kurama to fight - surprised both his opponent and their audience, but he didn't pay it much attention.

We don't even know if he's alive and any child he has might be killed on sight alomg with him. He's a criminal now, Naruto, as much as both you and I wished it weren't so. After all, Itachi had done his best to still watch over Naruto every now and then, even after his duty was passed on to someone else and then just taken out of the roaster altogether.

'I think the both of us are still quite skeptical about that,' and that was the last of it, as Naruto managed to lunge around one of Sasuke's attacks and tackle the slightly older boy to the ground. He channeled chakra into his fingers so they would stick to the ground when he found himself pinning Sasuke's wrists down, straddling his waist and their legs tangled together so he could keep him from choke-holding him with them or use them to throw him off. "Teme, damn it, snap out of it!" When the only response he got was something between a snarl and a grunt, followed by another increase in that dreadful chakra, Naruto let his hands instinctively turn to wood and root themselves into the ground. Sasuke must have blinked, for he had missed the three tomoe briefly appearing in Naruto's red irises around the slit pupil before they disappeared again.

The sensation of wood, where skin should have been, though, snapped something into place in Sasuke's mind and he stopped struggling. His eyes turned back to their normal black, confused and unsettled as he stared up at the blond Uzumaki and said younger boy sighed and slumped in relief when the black markings finally started to fade away, returning to the cursed seal Kurama had been talking about on the left side of Sasuke's pale neck. His high collar hid it from view, unless you knew it was there and were looking for it. The three tomoe that made up the Cursed Seal made the Jinchuuriki uneasy. It was almost as though it were a taunt to Sasuke's Sharingan, the tomoe that appeared when his eyes turned red with the power of his Kekkei Genkai.

"Naruto?" The Uchiha sounded almost confused, as though his loss of control had been a sort of sleepwalking and he had no idea how he ended up where he was. Naruto mused it might have as well been just that, as he barely remembered his own loss of control when he had thought Sasuke dead on the bridge while fighting Haku. He had almost killed Haku and had it not been for his Sharingan's immortal memory, he would have no as to what had happened. Had he killed Haku that day, chances were he would have never regained control of himself and Kakashi-sensei, Sakura-chan, Zabuza and the old bridge builder would have been next before he continued on to the village and then further until he was finally exhausted and broken enough for Kurama to take over. Maybe nothing of his true self would have remained at that point and Kurama would have been left with nothing but an empty vessel. Most biju would have probably celebrated, but the blond knew his fox friend would have mourned to the point that it would turn to grief and then anger and hatred. The Water Country would not have survived such a sudden attack of that scale. Question was, would the rest be prepared to retaliate soon enough? Would they kill Kurama somehow?

Naruto shook his head clear of those horrible thoughts and instead focused on his perplexed friend. "Good to have you back, bastard." He said with a grin that might have been a bit more strained than his usual smiles for Sasuke were and the other noticed. He also noticed the way Naruto's hands returned to actual hands instead of the root like structure they had taken in order to keep him down.

"That was quite a display," both boys looked up, along with everyone else in that clearing, to see Neji and Tenten there, the Hyuuga's arms crossed and his unnerving white eyes watching them intently. "For a loser."

The blue eyed blond scowled at the brunet and was about to snap something at him when he sensed the Otogakure shinobi making his way towards them. His eyes immediately went back to Kurama's red color, preparing to defend his friend who was clearly not in the best condition to fight, but he could only tilt his head in confusion when the foreign genin knelt before them, a black scroll being placed in front of them as though in offering.

"We have lost, Uchiha Sasuke. You are clearly stronger than us. Please let me take my teammates and leave in exchange for this Earth scroll."

"Just get out of here," Naruto told the bandaged, hunched teen as he finally sat up from where he had been leaning over Sasuke. Sasuke followed suit, turning his head around so he can keep his eyes on the Oto ninja as he stood up slowly. They both watched him, one eyes red, the other black, as he put the kunoichi and then the other guy over his shoulders - Naruto took note that he used very little chakra to enhance his muscles to do so, meaning he was stronger than he let on - before he turned to look at them. He gave Naruto a slow nod of his head, as though in thanks, before saying something about his master and Sasuke's power and how the next time they meet, the only way the other would leave is if one of them was dead. He then used Shunshin to disappear with his unconscious teammates and left Team 7 to deal with the other nine genin, one Rock Lee unconscious but easily woken by Tenten's shaking and Ino, Shikamaru and Chouji with only mild injuries. Sakura seemed to have taken the brunt of the initial attack, no doubt while guarding Sasuke and Naruto felt guilty for not being there for his teammates.

Kurama scoffed when he felt his guilt. It's not as though you were just lying around doing nothing. Ypu had your own recovering to do! You nearly died, kid. The Uchiha brat and pinkie better not begrudge you for it or else I'm coming out.

'Please don't,' Naruto replied a bit dryly to his inhabitant, sighing outwardly as Sakura and Ino continued their Academy rivalry over who gets to have Sasuke, Tenten and Lee talked about Lee's tendency to overdo things while Neji watched and Shikamaru and Chouji dismissed Naruto altogether like they have been doing the last couple of years. It didn't bother the blond all that much. He had more important thing to deal with. Like the way Sasuke was looking at him or the fact that he was still pretty much sitting in his best friend's lap. 'Crap.'

Realized only now, did you? Kurama teased like the merciless beast that he was. Naruto sent him a mental eye roll.

'I'm talking about him asking questions now.' The blond almost snapped back while trying to ignore Sasuke in favor of watching Ino trim Sakura's hair. Huh. Short hair looked good on her. Maybe this will serve as a wake up call to the pink haired girl, Naruto mused. This, if nothing else, was going to drive it home to Sakura that she had applied to a Shinobi Academy and that she was now a kunoichi. This will be a part of her daily routine if she makes it to chuunin.

''Naruto.'' He glanced back to Sasuke at the pointed tone the other boy used and he scrambled out of the raven's lap, a hot blush on his face. He had forgotten, again, that he had been sitting in the other's lap. Kurama was now howling in laughter at his embarrassment and even Sasuke had a smirk on his face, which Naruto honestly preferred over the maniacal grin that had been there not five minutes earlier. ''What happened?'' Then, he leaned closer to the younger boy, whispering his next question. ''Are you stupid? Why did you use your Mokuton in front of so many people!?''

Naruto looked over to said people and just shook his head. ''I'll tell you all about it later.'' He promised before reaching over to take up the black scroll, a grin on his face. ''It would seem that we are through to the next round!'' He chirped and enjoyed the fond look of exasperation cross Sasuke's face.

''We still need to get to the tower, Usuratonkachi. And I will hold you to that promise. Don't think I will forget.'' He warned and Naruto just waved him off with a sincere smile.

''Wouldn't dream about it.'' He replied and relaxed a little when Sasuke sent him one last mock warning look before shaking his head and smiling, too. He was just glad things were okay for now.