Training is life.

*Bang* *Bang* *Bang*

You could hear some noises in the forest behind the Hatake house, where there was a relatively large forest. In fact, it was the Hatake brothers training on how to climb trees.

Kakashi landed on another tree, dodging the kunai that was flying towards him. He was extremely fast, to the point where his speed rivaled that of an experienced genin.

After a few minutes of training, Kakashi fell to the ground without any ceremony; he couldn't take it anymore because he was completely exhausted. Kakashi had no energy or chakra left.

"Urgh... Eiji-ni... please, stop now, I'm dead tired," complained Kakashi. His brother was crazy! Throwing shuriken and kunai without an ounce of mercy. Just thinking about it, he shuddered in fear.

********************

-Time Release: Flashback without jutsu-

"So Kashi-ni, do you understand the theory?" asked Eiji, even though his brother was a genius, he had to confirm.

"Yes."

"Then give me a quick recap," Eiji said, gesturing for him to continue.

"You..." His brother was really doubting his intellect? Sighing, Kakashi gave up and explained with a slight frown.

"Tree Climbing Practice is a training method used mainly to increase chakra control. This training involves focusing a fixed amount of chakra on the soles of the feet and using it to climb a tree without using hands. If the flow is too weak, the user will lose their position on the tree and fall. If it's too strong, the user will be pushed away from the tree, causing it to break around the contact point and the user will fall."

"Excellent, as expected from my cute little brother, but there's something those books at home don't say, do you know what it is?" Eiji asked with a smile.

'Hmm? Something they don't teach in the books?' Kakashi thought about it, but couldn't find an answer. Defeated again, he asked his brother.

"What would that be?"

"It's not really a secret, but it's also not mentioned. This practice, besides giving you some help in battle and chakra control, also serves for walking on rocks since most rocks are smooth on their surface, yes...! You just need a little more control over your chakra, never forget that," Eiji explained patiently.

"You can use this as a reference because buildings, mountains, material constructions, and so on are extremely smooth, depending on which one, adjustment is necessary."

"I understand, but how are we going to practice with them then? We don't have many construction materials here in Konoha, and metal constructions are very hard to find." Although Kakashi didn't go out much, he had a general idea of Konoha everywhere.

Thinking about what his brother said, Eiji sighed... He hadn't thought about it; in his previous world, he had so much that he found it completely normal.

"Well, one step at a time. First, try to efficiently climb trees; this exercise shouldn't take more than 1 hour, after that, we'll move on to the next level." Stopping for a moment, Eiji looked directly into his brother's eyes and warned, "And I suggest you do it, otherwise, you'll regret it... deeply." The end of his brother's sentence made Kakashi really uncomfortable.

********************

-Time Release: 30 minutes later, without jutsu-

"Hey, Eiji-ni... I did it!" Kakashi was hanging upside down on a tree.

'Damn geniuses,' Eiji muttered to himself. He had only managed to rest for a measly 30 minutes!

'I'm glad I got these weapons in advance, I'm a genius,' Eiji nodded in satisfaction.

Seeing his brother pulling out a set of kunai from God knows where, Kakashi didn't have a good feeling.

"Hmm, brother?" Kakashi hesitated a bit to get his attention.

"What are you going to do with that?"

"Isn't it obvious? I'm going to train in three things at the same time," Eiji's wicked smile grew with each passing second.

Seeing that things weren't looking good, Kakashi still tried to question his older brother's motives, "And what are you going to train? Shurikenjutsu?" That's what he wanted to believe.

"Naaaah, I'm going to practice my Taijutsu, my kunai aiming, and also climbing trees."

'And your survival instincts,' he added in his mind.

"But there are no targets here at home," Kakashi warned.

Eiji's smile grew wider, and Kakashi's fear grew too. The look his brother was giving him wasn't like "Shoot me, a moving target."

"Well... You are the target, if you don't want to be cut, start running through the trees," Eiji smiled as he picked up the kunai and pointed it at Kakashi.

Kakashi didn't hesitate for a moment and started running frantically among the trees. Sometimes he slipped, but he managed to keep his balance.

"YOU BASTARD!"

"HAHAHAHAHAHAHA!"

Curses and laughter echoed throughout the forest.

-Flashback without jutsu: KAI-

********************

- How do you feel, Kakashi? Eiji felt no remorse for what he did. It was necessary, and they were only a few years old. Kakashi would thank him in the future... maybe?

"You realized it, you bastard? You! You hit me a few times, if I weren't fast enough, you would have killed me!" Kakashi shouted, his eyes burning with fury.

"Relax, most of my kunai didn't even hit a tree, only at the end, I improved," Eiji defended himself as if he had been unjustly accused.

'Thinking about it... How did he get so good?

We've been doing this for a maximum of 2 hours, how did he improve so quickly?' Although his brother was treacherous, he respected him. Some people called him a genius. But in reality, it was his brother.

Eiji always learned everything faster than him and calmly taught him as if he had been proficient for months, he even managed to create his own Taijutsu, Kakashi clenched his fists, he convinced himself that he would improve too.

Completely unaware of what was happening in his brother's mind, Eiji continued saying, "Actually, I lied to you, Kashi-ni, sorry."

Kakashi didn't understand and looked at his brother. "What do you mean?" He was perplexed, did Eiji deceive him?

"Yes, actually... This training is only done for those who graduated from the ninja academy, meaning genin. Some take a few days, a week, others take two, while we learned it in just a few hours."

"Is that something to be proud of," Eiji said with a bit of embarrassment, but Kakashi didn't see it as his scarf covered half of his face, just like his mask.

"I see..." Kakashi was irritated at first but soon calmed down, he understood why his older brother did it, and also... He really didn't care, the more he learned, the faster he would get out of that ninja academy; therewasn't much to learn there.

"You rested?"

"Why?" Eiji winked at Kakashi.

"It's time... let's start the water walking training, just like we trained now, walking on water isn't much different from climbing trees," he said as he picked up some stray kunai.

"Is there a difference?"

'I thought it was all the same.'

"Actually, yes. The difference is that the water is always in constant motion, so you need to pay more attention to the flow of chakra you release through your feet, the rest is similar to this," Eiji explained.

"Is that so? Alright then," Kakashi commented casually.

— Is he convincing himself again? He deserves a beating — Eiji rolled his eyes at Kakashi, it wasn't the exercise that was easy, they were just too good!

'Besides... Kakashi doesn't have the Sharingan in his eye, so that no longer limits his growth,' he thought absentmindedly as he picked up some leaves.

"Why are you taking leaves from the bush?" Kakashi asked about his brother's actions.

"Don't you say the training is too easy? If other people knew what you said just now, I'm sure you'd be hated," Eiji replied to the self-confident brother.

"What's my fault if they're rubbish? They spend all day playing instead of training, they waste their time on trivial things," Kakashi grumbled.

"And do you think you're any better? You can't even talk to a girl!" Eiji literally roasted Kakashi.

"You…!" Kakashi started, only to back off; he didn't bother to respond to his brother, he never won in any way.

Without bothering Kakashi anymore, Eiji changed the subject, "These leaves here are for you to stick on your forehead while you try to balance on the water, you will stick the leaf to your forehead with chakra, similar to climbing the tree." Eiji smiled as he handed some leaves to his brother.

Kakashi didn't care about the difficulty of the training; he would be bothered if there was no

training!

"Where are we going to train? We don't have a lake here?" Kakashi asked about the matter.

"Hot Springs!" Eiji exclaimed with great enthusiasm.

Or is the Naka River better?