Reborn as Naruto's Twin Brother

Konoha…

After reporting to the Anbu headquarters and Hokage Kirito went his way to look for Saito and Naruto as eh knew Saito might be teaching his big brother right now. Though he knows Naruto is his big brother though he isn't sure anymore if he became older or Naruto is still his older brother or he himself is the older brother in two.

"So you have returned? " As Kirito entered he heard Saito looking at him with a smike while reading his Ichi as always.

"Yes, it was really an unexpected event. " Kirito replied with a nod as he sat beside Saito.

"It looks like the effect of the pill wore off and you also lost more Chakara reserve then we thought. " Saito stopped reading his book and said with a serious tone as he looked at Kirito.

"Yes now I only have 75% Chakara reserve compared to Naruto but you said I will have the same level as him. " Kirito asked as he looked at Naruto who is training in the "Swift Release" right now.

"It might have happend because you returned to your original age before the estimated time. " Saito looked at the sky with a sigh as he also felt something is different about Kirito right now then looked at his student then asked "So you have learned the true reason behind Uzushiogakure's destruction and from your movement, I also saw that you have learned something from this mission. "

"Yes I met a part of Ichiraku Uzumaki's soul and he somehow left behind all his knowledge in my head and taught me his Kenjutsu and I also learned to sense everything without looking. " Kirito said with a nod as he didn't think Saito will do anything to harm him because by now he already treated Saito more than anyone else in the world.

"Then it was worth it to in sending you there. " Saito said with a satisfactory smile and added "Now it is time for you to learn the next step of your training as you have already learned sense, so it will be easier for me to teach you the next body movement skill of mine. "

"What is it Sensei? " Kirito asked with a surprise because he thought "Flash steps" and "Blink"are the strongest movement technique there could be.

"To tell you the truth it is actually not only a movement technique but not at the same time. " Saito said as he stood up.

"I don't understand what you want to tell me??? " Kirito asked still confused.

"The next step of your training is to make your mind stop making decisions and let your body do it by itself and if achieve that you will not need to think hard about how you will fight against your enemy and what your next move should be because your body will do that by itself. " Saito said as he started leading Kirito towards Naruto.

"How can one fight without thinking? " Kirito became even more confused because to win a fight one need to make proper planning and with proper planning, you can defeat even stronger opponents than yourself and that is what he was taught all along.

"Well that is not a hard question but even if I tell you still you will not understand until you master "True Instincts" and once you learn that everything will become clear to you. " Saito said with a wise tone as if he said, something profound to his student.

"Yes, whatever. " Kirito said while still not understanding his sensei's explanation of the subject.

"Alright, Naruto you can stop for today. " Saito said as they neared Naruto at the side.

"What is it sensei? " Naruto asked with surprise because usually he never gets a break until Daybreak.

"You see I want to test something and won't be able to help you with your training so I am giving you the day off for today. " Saito said as when Naruto asked him.

"Kirito!!! You have returned so soon. " Naruto asked with surprise because every time Kirito takes months but this time it took him only a week or so.

" Yes this time it didn't take me so long and I think I won't have to go out for some time. " Kirito said with a smile.

"You two can catch up later first I need to test something. " Saito said as he holds on to Kirito's shoulder and added "Naruto you return home me and Kirito need to go look for something and we will be back really quick. "

With that word, Saito vanished with Kirito from the spot leaving Naruto alone.

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In the Wind country…

In the middle of the Desert…

After leaving Naruto behind Saito arrived here with Kirito using his transportation jutsu.

"Isn't this?!! " Kirito asked getting surprised because this place looks similar to the wind cou try dessert where he went in the past to find herbal plant Kakashi when he got poisoned by Sasori.

"Yes you are right this is a part of the winding country where usually no one travels to and now I am going to see what my student learn here. " Saito said as he explained everything properly.

'As I thought. 'Kirito thought to himself then he looked at Saito with a confused eye to ask "But how did we come here so fast. "

"I used a long ranged teliportation Jutsu anyway, I hope you are prepared because it is about time I find out how much you have improved and depending on it we will move on to the next level of your training. " Saito said as he takes a battle stance.

"But you said you will teach me "True Instincts"or something??? " Kirito also took a battle stance.

"Well I plan on doing that if I find out you were telling me the truth about learning some new techniques from Uzumaki Ichizoku but if you didn't I will need to teach you those steps first. " Saito said with a serious tone.

"Ok then let's do this Sensei because I also want to see just how much I can hold against you. "Kirito asked excitedly because his current goal is to defeat Saito who's chakra he can't understand properly or feel his presence whenever he arrives beside him it might because he is too much stronger than him and to Kirito who believes he can fight almost anyone one vs one and win but when it comes to his own Sensei everything is a mystery to him.

"Remember only Kenjutsu and Taijutsu are allowed. " Saito said as he started moving toward Kirito who is also doing the same.

After 5 minutes of fighting Kirito is lying on the sand while holding a wooden sword which is covered with lightning and wind chakra while breathing heavily and bleeding from some parts of his body is looking at his Sensei with respect and horror in the eye.

"It appears you really learned the techniques you said but you still need to work more before I teach you "True Instincts" but before your next mission I think you will master "Death Release" from my clan. " Saito who doesn't even have single dust on his clothes as if he didn't fight a moment said while putting Kirito on his shoulder because the kid is unable to move right now.

"How am I not able to land a single hit on you even though I used the 4th inner Gates to make me a lot stronger and you didn't even use a ninja tool to fight me back. " Kirito asked with a frustrated tone because of how easily he got defeated by Saito who for the first 4.30 minutes just avoided him even not moving from his spot but still win while instructing him.

"As I said to you before it doesn't matter how much Chakra you have or how strong you are it will never work if you are not able to land a hit on your enemy than all is for nothing. " Saito said with a wise tone.

With that, they vanished from that spot using a teleportation jutsu.