So, this is my first fanfiction. I don't really know how great it's going to turn out but I hope it pleases someone. This is a fanfiction idea I've wanted to see for a little while but haven't. Basically Sasuke (from the shinden novels, cuz I like his design) goes back in time to help train Team 7, and overall stop major problems from occurring. This will be Sasuke-centric if that wasn't clear. I don't have a decent name for a title so I guess for now I'll keep it as it is. Suggestions would very much be appreciated. Anyway, I don't own Naruto or any of it's characters

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Sasuke was walking on his way back to the village. He heard that Naruto had just gotten married. He was heading to the village to congratulate his friend, and maybe even start dating Sakura. Officially, anyway.

Night was starting to fall and he decided to take a rest during the night. After everything was set up and he laid down, however…

xxx

Sasuke was having a very weird dream, and he knew it. He saw himself speaking with the sage, just before he had gotten his Rinnegan eye. Then the sage addressed him. It was unexpected to Sasuke when the sage had stopped talking the version of himself in the dream, and then to the actual him.

"I have seen the future Sasuke. I'm sure that Sharingan of yours saw it as well. Two more of my descendents decided to try to destroy the world."

"Yes, I've seen it," Sasuke replied. He had been having dreams lately of two men of the Otsutsuki clan coming after Naruto. To himself, he seemed much older in the dreams. It probably happened many years into the future.

"I will send you to a time where you might be able to put a stop to it," the Sage continued.

"Oh? Why me? Wouldn't Naruto be better suited to something like this?" He was aware that he was talking to a figment of his imagination, but he decided to humor it.

"Naruto wouldn't have a clue as to how to do something as delicate as this."

'Definitely sounds like the Dobe.' Then said, "Alright, let's say I do go back. You only told me that I was going somewhere I could stop it. When is that?"

"The time you became a genin."

"You're turning me into a genin?"

"No, you will be a separate entity from your younger counterpart. You will help your sensei and tutor team 7 whenever you can."

"What would happen to this world if I left?" Goddamn, he had one hell of an imagination.

"It would continue on as it had, only the legendary shinobi, Uchiha Sasuke had suddenly gone missing." Sasuke sighed.

xxx

Sasuke woke up refreshed. However, when he was just about to start his trek again, he saw something in a tree above him. When he moved to look, he saw the sage.

"What are you doing here?"

"I wasn't lying when I said I would send you to the past."

"So, that dream wasn't actually a dream?"

"Indeed."

"Alright. How's this going to work?"

"You'll have to fall into a death-like state, similar to when I first met you."

"You're joking," was all Sasuke said, and sighed.

"I will basically overload your mind, making you virtually brain dead."

"How do I know this won't kill me?"

"Do you not trust me enough not to kill you?"

"Fine, go ahead," Sasuke said grudgingly.

xxx

Sasuke woke up with the worst headache. His head was pounding and he was locked in a chair. It was comical only to see one hand strapped down. He figured that if he was strapped to a chair then he was somewhere in the T&I Department, which meant he couldn't show his Rinnegan. He knew he needed an alias. He couldn't just be "Sasuke" while looking almost exactly like his younger counterpart. Maybe he could, he didn't really know or care. All he knew was that he needed to stop the world from going to shit.

He soon saw the Sandaime Hokage, Sarutobi Hiruzen, and a man who he recognised as Morino Ibiki.

"Hey kid, care to tell us why there is huge crater just a few miles south of the village?" Ibiki asked. That crater was around the area where he was when the sage sent him. Wait, why was there a crater? Did he fall out of the sky or something ridiculous like that?

"Or why you were practically brain dead when we found you and are now fine?"

"My head really hurts and I'd rather not get interrogated right now," Sasuke drawled out. Ibiki made a move to punch him, but just before his fist could connect, he opened his eye and teleported behind the two men. "Please keep your hands off me, as I said, my head hurts."

"Boy," the Hokage spoke for the first time, "I want you to tell me exactly what you're doing in my village right now."

"That's a rather difficult question to answer. I was sent here on a mission."

"What kind of mission? Espionage?" Sarutobi asked.

"No, nothing of the sort. I was sent here to save the world." Ibiki burst out laughing when he said this.

"Ha, kid you've gotta be crazy to think we're going to believe that."

"I don't really care if you believe me or not, but I will do what I was sent here to do." And with that, he vanished without a trace. This made Ibiki stop laughing.

"Ibiki, gather the top jonin in the village and tell them to meet me in my office."

"Of course."

xxx

Sasuke was wandering around the village. He hoped he saw Team 7. Except that Kakashi would probably know that he had just escaped T&I. No doubt every jonin in the village would know by the end of the day.

After wandering for about an hour, he decided he would go to his old training ground to look for his team. He took the way he remembered when he was young, before the village was remodeled after Pain's... visit.

He eventually found it and saw himself and Naruto sparring while Sakura watched.

"Hey, girl," he said, knowing it would be weird to her if this strange man she's never seen before knew her name. After she looked up, and Naruto and himself stopped sparring to look at him as well, he continued.

"Why aren't you training?"

"She's waiting for me and Sasuke to stop sparring," Naruto supplied. "Then she's gonna spar one of us."

"Why doesn't she get any light exercise or stretching?"

"So that I'm not tired or sore when I spar."

"Please. Even if, and this a huge if, you get tired or sore, you should still be able to fight. Let's say you're on a mission. You're just settling down after running all day, and out of nowhere, enemy shinobi attack you. What then?"

"I guess you're right," Sakura said meekly. She knew what would happen if she was caught unaware by enemy shinobi. She would be captured and possibly even raped. She shuddered. When Sasuke saw that, he knew exactly what was going through her head.

"How about this. You get some exercise and tire yourself out a little bit. Afterwards, I'll spar with you."

"Are you a shinobi? If not then I might hurt you," she said.

"I assure you that I'll be fine. Just warm up for now."

xxx

After Naruto and Sasuke were done sparring, and Sakura done with her exercise, Sasuke threw a curveball at them.

"I want all three of you to fight me. As a team. If I see anyone working on their own, I will single you out, and you will be dealt with," Sasuke said threateningly. The kids looked a bit shaken. 'Good,' he thought.

"Why are we even listening to you? You're not our sensei. Besides, you're obviously not very good, seeing as you've lost an arm," younger Sasuke said. Naruto and Sakura hadn't even noticed he had only one arm. That cloak of his was always closed and his arm always covered.

"You make an excellent point. However, I'm far stronger than any of you could imagine." Sasuke gave them all a stern look from across the field.

"Hajime," he said, and for some reason, they listened all three disappeared. "At least Naruto has a decent head on his shoulders now," he whispered.

xxx

"How are we even going to do this?" Sakura asked as they all huddled together in the bushes.

"He hasn't moved a muscle since we started," Sasuke said. "But remember what he said about splitting up. We probably don't want him sneaking up on any of us."

"What if I lure him out?" Naruto asked. "I go off somewhere on my own, while you two follow, and when he attacks me, we all jump in and attack him." Sasuke and Sakura gave him an incredulous look. 'Did he actually just come up with a decent plan?' they both thought.

"Sure, why not Dobe," Sasuke said.

Naruto started running off in hopes he would draw out the mysterious man. Pretty soon he saw the man land in front of him.

xxx

"I'm gonna beat you!" Naruto shouted.

Sasuke felt Naruto's chakra run off away from the others. As he was about to move, he felt the other two start tailing him. 'So that's what they're planning,' he thought.

"I guess I'll humor them," he said aloud. He moved to intercept Naruto and was not disappointed. After Naruto yelled, the other two jumped out from opposite sides of the foliage. He had to dodge several kunai from Sakura and then a kick from Younger Sasuke. Then Naruto threw a punch using several of Kage Bunshin to attack. He quickly disposed of the bunshin and then kicked the real Naruto into a tree.

He performed a single hand sign, the first time in fact the kids had even seen his arm, and then blew a great ball of fire at Sakura, who was still off on the side distracting him with kunai and shuriken. Sasuke glanced up at the sun and determined that Kakashi will get here any moment.

No sooner had the thought crossed his mind had several kunai, thrown with much more speed, accuracy, and power than any genin could hope for flew towards him. He jumped out of the way and drew his sword.

"What are you doing with my students?" Kakashi asked in a voice possessed only by those who have been through war.

"Simple training was all. In fact they almost had me completely cornered." Both men knew that was a blatant lie, but all three genin were still there, so they kept up the facade. Judging by the look in Kakashi's eye, Sasuke determined he was recognised.

"Why don't we discuss business elsewhere, Hatake?" Sasuke asked and vanished.

"Who was that guy Sensei?" Sakura asked. "Should we not have trained with him?"

"That man is a very dangerous man. About 5 hours ago was the first time anyone in the village has even seen him and 2 hours ago he broke out of the deepest depths of T&I." All three stared in shock.

"He seemed nice enough," Naruto said.

"Yeah, and he looked kinda like you Sasuke-kun," Sakura spoke up.

"Hn."

"Anyway, I guess I'll go find him," Kakashi told the three of them.

xxx

Sasuke was walking down the street, getting a couple weird looks here and there from some people he recognised as shinobi. Just as he turned into an alleyway, Kakashi appeared right behind him.

"Where do you think you're going, prisoner?" Kakashi asked, not knowing his name.

"A place we can talk," Sasuke said as he walked further down the alley. Kakashi reluctantly followed him. He didn't have much to worry about, after all, he was one of the most talented jonin in the village and could defend himself just fine.

"This will do," Sasuke said after hitting a bend in the alley.

"What were you doing with my students?" Kakashi asked.

"Shouldn't you be trying to arrest me and taking me back to T&I?"

"I should, but the way you moved when dodging my kunai tells me it's going to be more trouble than it's worth."

"Indeed. Anyway, I was just training them."

"Bullshit. You just appear in my village, break out of one of the most secure locations here, and try to tell me you were just 'training?'" Kakashi asked incredulously.

"Yes."

"And you weren't trying to get secret information on Konoha?"

"Please, I already know just as much as Sandaime-sama himself." Kakashi had a kunai at his throat in a second.

"You will come quietly, and you will tell Hokage-sama everything you know," Kakashi said in a deathly serious voice. However, that didn't intimidate Sasuke in the least.

"Yeah, sure, whatever. Lead the way."

XXXXXX

Okay so as I said, this is my first fanfiction, and reading it back over, Sasuke seems really OOC to me. I imagine him being super chill during the shinden novels so that's how I made him (I think). It's not perfect but bear with me. Anyway, until the next chapter :)