The Limitless K

"Huh, you know me?" Goku had let his guard fall considerably as he folded his arms and looked up at his new 'sensei.'

"Of course, Goku-kun," The man standing on the ceiling blankly stared at Goku. His expression and tone of voice didn't match his words at all. "You are the talk of the town after all, some might even call you a prodigy." He complimented the boy, as he dropped down from the roof and stood in the middle of the room.

Goku scratched his head and smiled, "Prodigy?" He had never heard that one before, but he certainly trained like one. "How come Takeshi-sensei told me I didn't have a sensei then, and I don't have a team. This is all wrong."

"You're the first genin ever to defeat my clones and locate me, and trust me; there have been many others before you," The man walked up to Goku and patted him on the head. "I was wrong about you."

Despite the man's stoic expression and dead tone of voice, Goku felt the sincerity in his words, "Wrong?" The boy looked up with a confused face.

"I didn't want to teach you," The man admitted honestly. "I hate children," He added as he looked at Goku, "but you're special, just like they all tried to tell me. With that being said, I think you're worthy of being called my pupil. My name is K, and from now on I'll be your sensei."

"Awesome!" Goku exclaimed as he extended his fist toward K. The man simply looked at his fist with his same blank stare, but he respected the fist bump and extended his own fist and bumped it with Goku's. The boy couldn't hold back his laughter and excitement, and K took notice.

"I won't be going easy you," K grabbed Goku by the back of his shirt and lifted him off of the ground. He made sure their eyes locked onto each others, "One slip up and I'm dropping you like a bad habit." The man released his grip and Goku dropped to the ground quickly. K then proceeded to leave the room, "Come, we have much to do."

Goku quickly scrambled to get up, slightly scared of K, but followed him out of the room nonetheless. As they strolled through the corridor, he heard the sound of popping throughout the house, and he realized that it was the rest of the clones dispelling. The man walking before him had a sudden spike in Chakra, "Sorry for messing up your house by the way," Goku tried to make conversation, but got no response. He decided to instantly move to another subject, "I have a question, K-sensei."

"Shoot," K turned his head slightly so he could listen to Goku.

"Your clones, they were almost real. My clones don't disappear in a cloud of smoke or anything like that, and they don't make changes to the real world," Goku realized that he didn't really ask a question. He took a quick moment to regroup his thoughts, "I mean, my question is; how are your clones so durable? Is it like chakra or something?"

"Kage Bushin no Jutsu (Shadow Clone Jutsu)," K informed his new pupil. "It splits the users chakra evenly between the clones and essentially makes them real."

The boy nodded and continued to follow his sensei out of his home and into the village. He didn't fully understand, but he just assumed he would get it in due time. He wasted no time hitting his sensei with another question, "So when will you teach me my first non-academy jutsu? Oh! Oh! When are you we going on our first mission? And do you get paid a lot as jounin!?" Or a lot of questions. The boy frowned when his sensei didn't give him an initial response, "Hello?"

A bead of sweat rolled down his face, but he should have realized what he was getting into, "Your first new technique is coming soon," That was one answer. He knew Goku was expecting more and he quietly sighed, "And your first mission is coming sooner than you think." Little did the boy know, K was leading him to the Raikage's office at that moment to get their first mission.

Goku's mind was wandering aimlessly as he walked behind K. When he realized where they were going, he was more than excited. The Raikage's office building was getting closer and closer the longer they walked, he looked up at K with a smile, "Are we about to get a mission?"

"Maybe," His answer was very dry compared to Goku's. K led him inside the building, as he quietly greeted everyone he passed by. He was quite known and respected within the village, and Goku was now starting to take notice. The boy hadn't heard one story or any of his accomplishments, other than being a jounin. They were getting close to the actual office, "Goku, wait out here." The man didn't leave room for argument, as he entered the office and shut the door behind him.

Goku leaned against the wall and pouted his lip quietly, but his expression lightened once he saw Omoi, Karui, and a woman much older than them approaching the office. He smiled at the trio, "Hey guys, what's up!"

Omoi offered a light smile, while Karui full-on grinned at Goku. Their sensei was quite stoic in nature, similar to his. She was a blonde haired woman with blue eyes, and from what Goku could see; quite large breasts. His mouth could be seen hanging and a little bit of blood started to drip from his nose, "Who's in there?" She placed her hand on her hip and looked down on Goku, not even paying his perverted ways any mind.

Goku looked at Omoi first and mouthed the word 'dude,' and they fist bumped each other, but the stern glance from the woman brought his attention back to what was important, "My sensei, K, and the Raikage at the moment." He bowed respectfully, his mother having taught him better manners than what he showed. "My name is Son Goku, miss."

"The Limitless K, huh?" The woman nearly smirked, "Cool." She was impressed by only the name and almost forgot that Goku had introduced himself. "I know you, kid. I should introduce myself, I'm Samui."

Both of her genin had wide eyes, Karui being the first to shout, "YOUR SENSEI IS THE LIMITLESS K!? HOW THE HELL DID A DWEEB LIKE YOU GET PAIRED WITH HIM!?" The girl stomped up to Goku and punched him on the shoulder. He laughed lightly and tried to act like her hit didn't hurt, which it did.

"The same 'Limitless K' that once fought and took down the Yonbi all by himself?" Omoi asked, while looking up at Samui and receiving a nod. "I heard his physical strength is only rivaled by Tsunade Senju herself.." The boy was in complete awe.

Goku himself was impressed by hearing these good things about his sensei, at least now he knew he wasn't some punk like he initially thought.

The door of the Raikage's office slid open, and the mentioned man came strolling out, with Son Gohan following slowly behind. "I'm alright," The man stated dryly, before placing his hand on top of Goku's head. "We should leave now," He looked at Samui and offered his usual blank stare, and she sent one right back. It ended with them both smirking at each other, before he pushing Goku slightly.

"Bye guys!" Goku waved at his friends as they now entered the Raikage's office. He turned his head, and saw Son Gohan still trailing behind them without saying a word. The boy stop walking and turned to face Gohan, "Hey, Gohan-jiji, what's going on?" He smiled from cheek to cheek and offered his fist out to the man.

Gohan walked up to Goku and bumped fist with the boy, "Nothing much, Goku, but you've got a lot going on for you now, don't you?" Goku couldn't tell, but the masked man was smiling. "I'm in something of rush, kid. I can't wait until I can see you again!" Before Goku could interject, the man was gone in a crackle of electricity that he had grown used to.

The boy frowned, "He always does that!"

"I know," K continued walking, "But you're a ninja, so get used to those encounters, because you and your grandpa are busy men now."

Goku tried to understand, and he ran after his sensei so he could keep pace, "So what's our mission?"

"We're to deliver a parcel to Iwagakure within a week's time," The man informed his student. He didn't show him the parcel, but he was to keep it on his person. "During that time, I'll show you that new technique." K promised as they made their way out of the building and into the busy village.

"What's inside the .. uh .. Parcel?" Goku questioned.

"A large sum of money, we're giving a loan to Iwagakure as a sign of peace, and to help them get stability, for their economy is beginning to fail," K stopped in the middle of the road, "Meet me at the village gates tomorrow morning at 7 o'clock, I have some business to attend to in the mean time." The man made a single hand sign, before he disappeared in a crackle of electricity, similar to Son Gohan.

The alien frowned, "I can't wait until I learn that technique."

. . .

(Son Gohan's Hut)

The man quietly meditated on his next plan of action within his home. The news that was dropped on him within the Raikage's office was heavy, and it directly involved his pupil. The man broke his focus when his door opened, to reveal his original student; K, who wore a visible frown for the first time in a while, "What brings you here?"

"Don't act like you don't know," He sighed as he sat in the same meditation pose as his sensei. "The intruder that the Raikage mentioned, he's not someone we can let normal ANBU flunkies handle."

Gohan nodded in agreement, "I understand, but until more information pours in; I can't go in and settle it myself." The man tried to regain his focus, but the thoughts were troubling his mind too much. "My best unit should be back soon enough."

"Can I get the full story?"

"A Leaf ANBU was caught trying to disguise himself as one of us," The very thought of it brought a pain to Gohan's chest, "He was gathering intel about Goku, his arrival, his strength, and origins. According to the other members, this disturbance could have been going on for up to a month. I don't know what Konoha plans to do with this info, but if we work quickly; we can eliminate this threat." He pushed himself off of the ground and walked out of his hut.

K sat there for another minute as he processed the information, and then he got up to follow his sensei outside. He wasn't quite sure himself why Kohona of all vilages would want to know about Goku, and all he was left to was his imagination. Information about Goku alone could start threats of a war, with him being talked about as super weapon that would increase Kumo's military power a great deal. It wasn't necessarily false, but they tried not to present it that way, for he was supposed to be a normal shinobi.

When he walked outside, he saw Gohan standing there leaking killing intent. There was a messenger pidgeon perched on his shoulder, as he stood there letting it all soak in for a minute. K walked up behind the man, "What's the problem, sensei?" He raised a curious eye brow, and the man turned to look at him.

"They've indentified the intruder as Kakashi Hatake, he was accompanied by one other who's name has yet to get back to me, but he's been murdered, while the infamous copy ninja is still on the run," Gohan was ready to explode, "We must hunt him down at once!"

"I'll handle it swiftly," K was about to make his leave, but Gohan stepped forward and placed his hand on his shoulder.

"You're not an ANBU operative, I'll handle it myself," The man was extremely upset right now and he felt the need to take things into his own hands. "Goku is going to need you more than ever soon enough, and I trusted you with his development as a true shinobi."

"But, you're the leader of the black ops. Surely someone else, if not me, can go in your place," K had noticed how deathly serious his sensei was, and knew he was talking to a brick wall at this point. "I can retrieve the copy-nin and be back before morning."

"No," Gohan wouldn't let the man slip away with information this personal, and he once again felt the need to settle the matter himself. Before K could further plead with his sensei to hand reigns of the mission over to him, his mind was set, and he disappeared in a crackle of electricity.

. . .

(Raikage's Office)

"THIS MEANS WAR!" A yelled at the top of his lungs as he wasted no time tossing his entire desk through the wall of his office, "HOW THE HELL DO YOU PEOPLE LET SOMEONE GET AWAY WITH SOMETHING OF THIS NATURE!?"

K was as calm and emotionless as ever, "It was Kakashi Hatake, sir," he said as if that were supposed to make things better. He folded his arms over each other, "I think you may be overreacting. Calm down."

A's eyes widened at the man's statement. No one has ever told him to calm down in the heat of the moment, and he thought that his subordinates knew better. The Raikage only got angrier as he picked his chair up and tossed it directly at K, "YOU'RE TELLING ME TO CALM DOWN, WHEN KONOHA WAS RIGHT UNDER OUR NOSE!? KAKASHI HAS COUNTS OF MURDER AND HIGH TREASON ON HIS HEAD RIGHT NOW, AND TO ME THAT MEANS KONOHA WANTS WAR!" He punched his fist into his open palm, "IF NOT WAR, I WANT KAKASHI HATAKE DEAD IMMEDIATELY."

The man moved out of the way of the chair and continued to talk to the Raikage, "We don't want to play into Konoha's hands, Raikage-sama. For the time being we should let it be. They can't do much with the information on Goku," K was trying his best to reason with the angry man, "While it is a serious breach in information, it is not war worthy. We should take the smart route and slowly pick apart Konoha one by one."

The Raikage grit his teeth, "I want immediate action!" He pointed at K, "I keep trusting you people to take care of these things, so you damn sure better handle this swiftly, K!"

The stoic shinobi nodded his head, "I understand, sir." He bowed respectfully to the Raikage, "Once you and your advisers come up with a reasonable plan, I will happily execute it."

"I'll have it ready upon your return from Iwagakure, now get the fuck out of here," A demanded.

. . .

(Kumogakure Outskirts)

His house was already located on the outskirts of the village, and from the reports he had received; the ninja couldn't have gotten that far. He took off with lightning speed and made his way through many mountains in a short amount of time. From what he understood, Kakashi could've only been thirty minutes ahead of him, since he was delayed by having to engage a whole unit of his ANBU members. He shook his head as he ran at the thought of a single man taking down six shinobi, but he didn't think it was impossible.

Knowing how intelligent this man could be, he wasn't expecting to find him out in the open, but rather hiding away and trying to move in silence. Gohan knew all the tricks, being a member of the black ops himself for some years now. He also knew all the mottos, and followed them almost religiously. One of those being, 'never expect the unexpected,' which was why it was safe to say he wasn't surprised when he arrived to the scene of the battle.

The land was scarred by almost all the elements, a true testament of Kakashi abilities. There were no bodies left on the scene, all them being retrieved, and the copy ninja was still at large. The masked man stood there for a moment, before sending out a sensory pulse of chakra to try and hone in on Kakashi's location, and much to his surprise; a pulse of chakra was sent back.

The chakra signature was large, and absolutely no normal shinobi. Gohan knew it was the man he was looking for, and he didn't understand why he was making himself known so easily. He was almost hesitant to follow through with it, but he took off in the direction and covered the distance quite fast.

It was close to the border of Lightning Country, and it was one of the few areas that was vast and open. It was the area between two mountains, and Kakashi Hatake stood in the center of it with no fear. When Son Gohan touched down, leaking an enormous amount of killing intent, he didn't back down, and only matched the intent.

"Why did you stop, Kakashi Hatake?" Gohan opened the conversation with a question, "You had every chance to keep moving toward Kohona, you could've even been there in two days time."

"I could have, I still can, and I still intend to," The man in question was quite tall, and slim in figure. He had gravity defying silver hair that was very spiky, the man wore an all black outfit for this mission, and had his left eye covered by his stolen Kumogakure head band. He was even wearing a Kumo-nin's flak jacket, "But, naturally I wanted to further inquire about the information I've received. You never seemed like a close-book type of person, I figured I'd take a risk." He said smoothly, even though he was breaking a lot of rules just to act on a hunch.

"You would risk it all for this moment?" Gohan continued to question. Had it been one of his operatives, depending on the outcome; he would have called them an idiot, but he didn't judge Kakashi too harshly. He knew the man covered all of the flaws in his plan, so he still had to worry about the information reaching Konoha. "That's a bold move, Hatake."

"I'm aware, but like I said... I still have questions," Kakashi didn't seem to take the situation too serious. "I understand that Son Goku is an alien of sorts, possesses immense strength, and is designed to be a super-weapon, but what are your true intentions for the boy? I noticed that you had a strong personal relationship with him."

"I want Goku to be the best he can be, I truly believe he could be one of the most legendary shinobi ever based off of his willpower alone," Gohan explained to Kakashi, while consciously leaving out any important details. "It was never my intention for Goku to be the source of our military power, but rather a strong shinobi that will lead my country, or even the world to a better place. I see it within him."

". . . That's, interesting to say the least," Kakashi withdrew a kunai as he prepared himself for battle. "The reason I ask is that, the way I present this information to the Hokage will change Goku's future for the better ... or worse if what we suspected is true, and from what I've heard; I think we were right in our assumptions." The man lifted his headband to reveal a blood-red sharigan eye with three tomoe constantly rotating, "I present you the option of letting me leave, and I spare your life, or we can fight to the death and you die for no reason. Regardless of this outcome, my ninken are still making their way to Konohagakure at break-neck speeds, so my intel on Goku will still be circulating in the Leaf."

"How do I know you're not bluffing?" Gohan asked, drawing his own kunai and getting into a fighting stance. He knew hunting down and killing summon animals would be extremely easier than taking down Kakashi, his village had ninken of their own, and this would rid Kumogakure of any future problems from the shinobi.

"I don't," Kakashi stated flatly as he was the one to begin their battle by throwing his kunai, which was covered in lightning chakra. The man blocked the blade with his own but the kunai knife broke in half from the impact, and he quickly threw it to the ground. The copy ninja ran through a quick set of hand seals before taking a deep breath, "Katon: Gōkakyū no Jutsu (Fire Style: Fire Ball Jutsu)!" The man exhaled a giant ball of fire that was sent directly at Gohan, which he managed to barely dodge by rolling out of its way.

He knew taking on Kakashi wouldn't be easy, but he seemed ready for the challenge. He flew through his own set of seals, "It's a shame, had you not been a Konoha shinobi; I would have loved to have you as apart of my forces." The man charged up his arm with lightning chakra and disappeared in a blur to even Kakashi's eyes. The man quickly closed the distance between the two, "Raiton: Rai-ken (Fist of Lightning)!" Gohan thrust his fist foward and was surprised when Kakashi evaded the head on attack with a swift movement, back pedaling away from Gohan.

"I'm flattered," Kakashi said jokingly, as he did the same as Gohan. He channeled his chakra into his hand and converted it to lightning chakra, as the sound of birds chirping resonated through the area, "But I made a promise to someone and I plan to keep it, so I'll probably be in Konoha for a while." He had taken note that the man's jutsu didn't dispel, and his arm was still coated in lightning. Kakashi took this as a chance to guage the man's strength while still trying to do damage, as he took off toward Gohan, and he did the same to Kakashi.

The two met in the center of the clearing, clashing attacks. Both of them hadn't realized how powerful their jutsu were, and certainly hadn't expected the ground to shake for a moment. A small crater had formed from the power struggle, as they both tried to get the upper hand, but ultimately got blown away from each other. They both tumbled across the ground and instantly jumped back up.

"Why did they choose you, Kakashi? I thought you retired from the ANBU," Gohan asked from across the clearing, as he got into a fighting stance once again.

"I did," Kakashi explained, "But the Hokage couldn't see anyone doing this job other than myself. It wasn't considered a mission as a black op, but rather an S-Rank with a high-risk, high-reward scenario. If I do say so myself, I think there were better options, but .. here I am." The man deflected two shuriken with another of his kunai mid-conversation, as he got into a defensive position. "What made you join the ANBU?" He asked as he drew his own shuriken and launched them at his enemy.

Gohan had swift movements, as he cart-wheeled out the way of the shuriken. Once he regained his footing, he charged forward at Kakashi to engage him in hand-to-hand combat. He realized using certain ninjutsu was close to useless, because Kakashi had seen it all, and if he hadn't seen it; it would end up being used against him. Once the man was in close quarters of the copy ninja, he threw punches and kicks that Kakashi either blocked, parried, or straight up evaded. The man was skilled, "At first I was apart of overseeing Goku's investigation due to my involvement," Gohan guided Kakashi's fist out of his way and wasted no kicking the man in the crotch. He wasn't against low blows, "But as it started developing, I found a passion for moving in the shadows."

Kakashi tried not to show his pain, but it was too much. He understood they were shinobi, and anything goes, but his nuts should've been out of the question. That was just man law, and Gohan had broken it, "I see." With the sharingan, Kakashi's perception of time and Gohan's movements were slowed down and easier to predict, but the masked man was still damn fast, and Kakashi struggled to block his moves at some points. An open palm strike to his chest sent Kakashi sliding backward against his will, but he was powerful enough to keep his footing.

With the space Gohan had created, Kakashi wasted no time flying through hand seals, and creating a giant wall of rock that rose from the ground, "Why don't we kick this up a notch? Doton: Doryūheki (Earth Style: Earth Wall)!" Gohan was instantly put on the defensive as Kakashi began striking his own wall and sending out flying blocks of earth like projectiles at Gohan. The ANBU leader broke the blocks with his fist, but at some point realized there were too many being made.

He continued to dodge them as best he could and withdrew a kunai and an explosive tag. His target being Kakashi's wall, which he threw his kunai at and planted it within the wall. It only took a few moments, but the wall exploded and debris was being sent flying everywhere. Gohan smirked lightly, but was shocked to see Kakashi gliding across the ground easily on a self-made platform of Earth, and beginning to chase him. The man flipped backward and tried to escape the oncoming Konoha shinobi, but the platform shot Kakashi into the air.

While airborne, Kakashi channeled his chakra to perform his signature technique once again. This one how ever had been more powerful than his last, "Raikiri (Lightning Cutter)!" He dived down faster than any shinobi Gohan had ever seen and tried to strike him with the power of the revered Raikiri. The man wasn't fast enough to counter, but only attempt to defend himself, and he ended up losing his right arm in the process. The attack pierced right through his arm, but Kakashi retracted his fist and back pedaled away from Gohan before he could reach his torso.

The man tried to send his own lightning chakra outward in an attempt to diffuse the raikiri, and attack him at the same time. Gohan noted that his right arm was completely lifeless, useless, and close to falling off. Kakashi had effectively fried the nerve cells in his arm so he only felt the pain for a brief moment. He placed his working fingers to side of his face, "You're good, I'll give you that." The old man smirked, "But I'm better. Taiyōken (Fist Of The Sun)." Once he said that, the whole area was swallowed by a blinding light, that rendered Kakashi's normal vision useless for the moment.

Gohan used his shushin technique to appear behind Kakashi in an instant, with his only fist cocked back and crackling with a great amount of electricity packed into it. He thrust it forward, but Kakashi senses were better, and he was was quicker than the old man, so he pivoted on his foot. The Konoha ninja leapt backward, while drawing a kunai and infusing it with his lightning chakra. Gohan was expecting it to be thrown, but his eyes widened when a spear of lightning pierced through his chest, "H-How?"

"Your blinding light maybe have made my one good eye useless, but the sharingan can see chakra signatures," Kakashi kept his kunai in firm position. "I'm sorry it had to be this way-"

"Damn you, Kakashi Hatake!" Gohan yelled out in what he realized may have been his last words.

Kakashi slowly kept cutting through Gohan's body with his spear of lightning, and finally slashed through the vital point he intended to hit, and that was the heart. It ended the old man's life almost instantly, "But it's over.." Kakashi finished his earlier sentence as he dropped his kunai to the ground. He was mentally and physically exhausted at this point, but he couldn't waste anymore time. Kakashi disappeared in a poof of smoke, not bothering to deal with Gohan's dead body.

The Copy Ninja had gotten away.

. . .

I didn't have big plans for Grandpa Gohan. Next Chapter: Tardy Without Reason