I do not own Naruto.
---------
Quick recap:
Naruto enters the Academy, and is forced by biased teachers to repeat his first year twice, ending up in the class of Sasuke, Kiba, Sakura, Choji, Shikamaru, Hinata, Ino, and Shino. He managed to perfect his "chakra bullet" technique, by adding a tracking element. He can perform many techniques with no hand-seals and no speaking, and has begun his foray into the deep world of Genjutsu.
---------
---------
Naruto walked into the classroom just as the bell was ringing. He looked up at his few friends—Kiba, Choji, and Shikamaru—as the former waved him over to the seat next to him.
Naruto smiled as he ran up the steps in the classroom to take his seat beside them, he whispered a quick, "Hey guys," as he took his seat.
Class went on for quite a while with Shikamau sleeping, Choji munching on chips, and Naruto and Kiba kicking each other under the table, trying to see who would yell out first. Of course, Naruto won every time, thanks to his self-induced torture.
Eventually they were let out for lunch, and when they came back there was someone else in the room.
"Students, I want you all to meet Mizuki-sensei. He will be your primary instructor for Taijutsu-related exercises for the rest of the Academy."
Naruto felt like banging his head on the table. Already he had seen the looks that Mizuki was shooting him, and he would be stuck with him for three more years. However, this would make pretending to suck at Taijutsu rather easy.
Fuck, he thought, this is gonna be one hell of a long haul.
---------
After a rather easy day of Taijutsu practice, Naruto had to get a real work-out in. He ended up running thirty laps around Konoha, all the while maintaining an Invisibility illusion and condensing a trail of water behind him. He had recently begun learning to manipulate Earth, so as he ran, he also caused a trail of short, jagged rock to appear behind him. When he was done, sweat was practically pouring off of him and his breathing was labored. But he still had one thing left to do.
He began to walk one more lap, evaporating the water with a controlled stream of super-hot fire and destroying the rock he had created.
Probably the hardest part of the whole thing was bending light around what he had created so that nobody would see it. That alone required intense levels of focus. It was a testament to his abilities that he could manage what he did.
Satisfied that all of his skills were up to what he considered his minimum requirements, he Body Flickered to his new favorite training ground—area 44, or as it was more commonly known, the Forest of Death.
He had found it to be ideal for his purposes over Break; training there was basically survival and stealth training all day long. And it did wonders for situational awareness.
It was there that he pulled out a thick book labelled "The History of Konohagakure." He spent the rest of the day there flipping through the book, occasionally firing blades of chakra to slice straight through an animal that had snuck up on him. He even though he had erected tall walls of rock around him so that he wouldn't be interrupted.
Engrossed as he was in his learning, he didn't even realize as the sun set and a full moon arced its way above his head. When more and more creatures began to attack him, he created a moat around the walls and built a roof, so that nothing could get in. He was capable of going as long as 72 hours without sleep and still function, so it didn't matter how late he stayed up. Occasionally he used a useful Wind Release technique that replenished the oxygen content in the air by converting carbon dioxide.
Being a book about a shinobi village, it was basically an epic story. And, like all good stories, it ended with good triumphing over evil, or in this case the Fourth Hokage killing the Kyuubi. The book even had a few pages dedicated to the nature of the Kyuubi.
The Kyuubi, it said, was a being made out of pure chakra. It was said to be a living god in its strength, the chakra at its disposal just short of limitless, its control over it impeccable.
But wait, that can't be right. I know that chakra can do pretty much anything. If somehow this beast had a nearly limitless amount, it wouldn't be possible for it to be defeated. It would be able to deal with any physical threat around it.
Quickly, Naruto ran over what he knew about chakra in his head.
Chakra cannot be destroyed, for chakra is energy. All it can do is be moved, be forced to take a different shape, be forced to enter a limited space. In extreme cases, it can be forced into another chakra system, bound by complex Sealing Techniques that bound its potential.
Naruto dropped the book and channeled chakra, pulling his shirt up and looking at his belly. Sure enough, the complex-looking array of intricate seals appeared there, just as he sometimes saw it during training.
Suddenly, all the pieces fell into place. The day of his birth, the nature of chakra, the seal on his belly, the looks everyone shot him, the assassination attempt. A wide grin split his face.
Holy shit. I'm so fucking lucky!
---------
Naruto practically skipped into his classroom the day after. After all, he had learned some good things last night.
Sure, most people would assume that having a giant fox demon sealed within him would bother him, but that was just stupid. After all, to be mad or resentful about it would be pointless. The glares he got didn't bother him anymore, and the poor treatment he got from adults meant nothing to him since he had thrown himself into training.
All that the Kyuubi was now was a powerful benefit. If he was injured, he would be healed. If he was somehow, miraculously, out of chakra, then he would get more.
In fact, the Kyuubi was probably why he had so much chakra. His body and spirit had adapted to having to constantly suppress such a powerful force, and as such it would be constantly expanding until he had as much chakra as the Kyuubi—as far away as that may be.
In fact, since the Kyuubi would be constantly healing him, there was a very real chance that his body would never begin to decay once it hit his prime. And what that meant was eternal youth.
Even if the Kyuubi gained the ability to talk to him it probably wouldn't be much of a problem.
However, he would have to learn the Sealing Arts, because it was definitely possible to do other useful things to that seal. And if the Kyuubi ever did somehow become a problem, he'd be able to fix it.
In fact, it suddenly occurred to him, without the Kyuubi, I might not have even become who I am. I'd be a normal ninja doing things the normal way. It's much better this way. I'm already stronger than most ninja in the village, I know, and I guess it's thanks to the Kyuubi. The only real problem is that now I can't leave until I can take on anyone here and win. Not that that's far off.
He was thinking about all of this as he listened to a lecture from Iruka on the importance of good physical training, leaning back in his chair.
That was, until something spoke in his head.
You're welcome, kid.
He was so startled that he accidentally fell over backwards in his chair, hitting his head on the table behind him.
Under his breath he murmured some choice curse words as he suddenly felt very faint. By now everyone in the class was looking at him as suddenly fell forward, smashing his head on the table in front of him and losing consciousness.
---------
Naruto opened his eyes to see a beautiful hardwood ceiling. Sitting up, he noticed that the floor looked the same, as did the walls. He was standing in between two rows of bookshelves that extended downwards far as he could see. Behind him was another wall like the ones that surrounded him. Shrugging, he began to walk forward. It took him what seemed like hours, but eventually something new came into sight. A cage. A massive, hulking cage that extended past the walls and the ceiling. Inside it was pitch black, save for two large, red, glowing eyes. Knowing full-well what it was, Naruto began to ran, anxious to hear what it had to say.
When he reached the cage, he was panting lightly. It was a much farther run than he thought it would be. But that certainly didn't deter him.
"Hello Kyuubi-sama."
He was careful to be respectful.
"Listen kid. I don't give a flying fuck what you have to say to me. You continue to get stronger, and you kill lots of people when you get older, and I'll leave you the fuck alone. Hell, I'll even give you some of my power when you want it."
Well, that was just fine. He realized that he would, one day, need to kill people. And since he was eventually going to reveal his full power he would have plenty of work to do. Mercy was for weak-minded fools and weak-minded fools alone. Naruto may be a kind person to those that he considered friends, but his kindness ended there.
---------
---------
A/N: Sorry if you disliked the way that the Kyuubi and Naruto dealt with each other. It's just that I feel that the only reason he tried what he did with canon Naruto was that he knew he was fucking stupid and might actually get away with it. Here, he is deciding to allow Naruto to use as much power as he wants, hoping that maybe he'll use too much and be overwhelmed by its influence. Or, he might be hoping that in the heat of battle, he'll let his emotions get the best of him. (I use HE, but it's a freaking demon. It could really be whatever it wants to I think.)