Reminder-Naruto learned Rasengan in like a month... he had piss poor control, it cannot be that hard to learn or Naruto is a prodigy...
What could Kagami, who is using his brain and had great control do?
After walking for three days, in which Kagami managed not to give in to his impulses to carve out Jiraiya's kidneys due to the man's granting personality mixing so well with Naruto's, the group stopped at a Fair in which Naruto really wanted to enjoy. Kagami couldn't judge Naruto for that, After all he of all people knew what it was like to crave the happiness denied to him as a child. Still, it was kind of annoying to listen to the boy begged. What Kagami could judge however was Jiraiya, one of the wealthiest people on the planet due to his books and excellent service as a Ninja, stealing Naruto's money under the pretenses of saving Naruto from Overindulgence.
Kagami snatched the wallet back in an instant, killer intent exploding from him in waves. "You are a piece of shit, you know that? Stealing from a kid, on a mission no doubt? I should report your ass to whomever the next Hokage is going to be.
Kagamt spent the majority of that day following Naruto around, playing various games and just generally having fun. Naruto had the weirdest luck with random gambling games, he always won which was very weird but they ended up making a pretty penny. Overall it was a rather enjoyable evening. He was happy to spend the day with Naruto, he missed his brother and this was a perfect day.
Since they were done with the fair, Kagami took Naruto to find Jiraiya. It wasn't hard to find that now inebriated man as his chakra was rather large. Kagami wasn't surprised in the slightest to find the man covered in prostitutes while drinking copious amounts of alcohol. Naruto was surprised of course, and rather angry, so he approached and began to yell at the man.
Desperately Filled with the desire to ruin Jiraiya's chance to get laid, Kagami was so annoyed he walked out of the brothel. "Do not kill a sanin, do not kill a sanin... "
Feeling a sudden accumulation of chakra, he turned to Jiraiya who was driving a ball of chakra into a man's stomach. It seemed to be griding the man's body, before throwing him across the street into a stand. The strangest part was that he spiraled into the stand.
"The fuck was that?" Kagami asked. "Wait, was that the rasengan? The Fourth Hokage's legendary Jutsu?" Kagami knew of it of course, having been well read for years.
"Oh, what, now you're impressed?" Jiraiya was smug, cocky and pleased. "This is the jutsu I promised to show you two, worth it?"
"""
" The jutsu I am about to teach you two is called the Rasengan. It was created by the Fourth Hokage and as such is a Village treasure I expect you to respect." The Sanin gave Naruto a rather stern glare at that point, then moved the glare to Kagami who glared right back.
" Now there are three steps to completing the Rasengan. The first step is Rotation, to master that you will need these." Jiraiya tossed Naruto a water balloon, then took one out himself and began to channel his chakra into it.
The balloon rippled, the popped and Kagami observed it... curious, he flipped his hand over and started to mimic what he saw. " Rotation... control... and creation... doesn't seem too hard." Kagami closed his eyes and let the image of the Rasengan appear to him. He reviewed the memory of Jiraiya just using it...and then he copied him. He pulled his chakra into his palm and rotated it like with the water separation exercise. Before he knew it, something amazing happened.
Immediately a small Rasengan appeared on Kagami's hand. " Like this Jiraiya?" It was tiny, a third of the size of Jiraiya's previous Rasengan.
Naruto screamed at Kagami " HOW'D YOU DO IT SO QUICKLY? AND WHY IS IT SO SMALL?"
Turning to Naruto, Kagami frowned. "Honestly, I just mimicked what I saw. It isn't that stable or that hard... it is basically just a chakra control exercise. Shape manipulation is something I have experience with too, since that is the key to chakra flow with my blade."
Jiraiya walked over to Kagami and looked at his Rasengan. "Improve your rotation and the power, otherwise it will backfire but other than that... good work, kid..." The man spoke with a far off look, as if he could not believe what he was seeing. "You might need a few days to practice it though, less you hurt yourself."
Naruto huffed. "It's so not fair, why are you so good at everything."
"Hard work Naruto, being smart helps but I work my ass off..." A sudden idea came to Kagami, one that he could only benefit from, pass or fail. " Tell you what, I can prove it. I will get you to master the Rasengan in one month."
Jiraiya gaped. " Your serious?"
"Yup, if I do... you'll teach me the beginnings of sealing, or at least give me the resources to learn it on my own. You are said to be a master, right? I wanna learn." What he didn't say was that he needed to learn it. Sealing beyond the basics were forbidden for genin to learn. As a Jinchuurki he wanted, needed to learn it so he had control over his fate.
The man held out a hand. "Deal."
"What are the steps for the Jutsu, you mentioned the first step? I wanna master it more on my own too."
"First step is just popping the ballon... second is using it on a rubber ball to make the power. The last is to maintain the shape and flow of a water balloon without popping it. Can you do that?"
"I'll work on it... Naruto, I need to see how good your chakra control is... and then we can get into business."
"""
'No wonder Sensei was unsure of him. He is not fond of the Leaf, he hates Minato and he has serious talent. I hear he is a sensor, which would be majorly helpful for him in learning that jutsu. He could really help Naruto master it too... I am pretty sure Naruto is the Child of Prophecy."
"Naruto, I'll make you a bet. Master the first step in less than ten tries and I will teach you better taijutsu." Kagami said, and Naruto screamed with joy.
"Yatta, do you mean it Kagami?"
Kagami just laughed. "I missed you, this gives me a chance to spend time with you so yeah, I mean it."
Naruto, ever the child, went wide-eyed.
"Really?"
"Yup."And that was how Jiraiya Naruto would get better it in a week. Kagami cracked the code, bribery was the key to Naruto's growth.
""
"How are you so good?" Naruto asked after Kagami, having spent about six or so hours practicing, finally got a hold of the Rasengan and mastered it to the point he needed no help. "It's not fair."
"Naruto, what you see is the results of literal years of hard training. I had to train for years to get my chakra control up, months to learn shape manipulation. You just focus on taijutsu and spamming the enemy with clones, you don't really think about what you are doing. Now hush and walk up the tree with your hands while sticking leaves to your body. Once you get good enough with that, we can move onto the Rasengan. You need far better control than you have."
Naruto grumbled a bit but nodded. "Fine, what you will be doing?"
"I will be working on my kenjutsu. I need to be better if we are going to face kage level ninja. Don't worry about my Rasengan, I need to work on the rotation some more, but it wom;'t be my focus. I need to keep all of my skills up. You need to at least doublee your contorl before you can even start the Rasegnan!"
And so Naruto did his chakra control exercises while his brother worked on his kenjutsu, both working very hard to become as strong as they could be
Chapter end, tell me what you think in the reviews.
Naruto learned the Rasengan in a month while bieng dumb as a stump and having pisspoor control when the Rasegan is basically one giant contorl exercise, so Kagami who has excellent contorl and actually uses his brain can get it far faster.