Training Regime.

After getting healed by medical-nin, who raised an eyebrow at his healing speed, as even with the help of medical arts this recovery rate was considered too fast, Aki went home.

"Shadow clone jutsu," Aki summoned his clones as soon as he entered the room. It was time for self-training.

This time, he managed to summon only two clones, directing both to practice the substitution jutsu. They vanished almost immediately

It was the safest way to practice substitution jutsu, he felt like an idiot not using them with Kaela, and the three Jonin didn't even remind him.

Aki pouted at the thought… wait pouted?

Aki felt embarrassed immediately he was already an adult for a time before he reincarnated...

There was no time to dwell on that, his chakra control was leveling up rapidly, and he was tempted to start Rasengan training and reach Kage-level chakra control in one go.

Once he learns Rasengan, he will divide it in stages like this:

1: tennis ball-Rasengan (high Genin to low Chunin) [Boruto's tiny rasengan]

2: Balloon-sized (One Naruto learned in Shippuden)

3: Basketball-sized (Jonin also time to learn sage mode)

4: Giant Rasengan (Kage level… one Naruto uses after becoming Hokage in Boruto)

---- He should be able to unlock Rinne-Sharringan at this level… Naruto is stronger than Hashirama, right?

5: Susano Sized (let's consider this low-Otsutsuki level)

6: Mateor-sized (Isshiki level if he is actually stronger than Kaguya)

7: Planet-sized (A/N: Any otsutsuki who can do this?)

Just like Kamehameha from a certain Anime, Rasengan has infinite potential hell it might be stronger if it reached similar levels.

But yeah, there are disadvantageous points too… if it's bigger it would be easier to dodge.

But right now, he is barely at Genin level, even Boruto's tiny Rasengan would be a stretch, let's not get ahead of ourselves.

"Shadow Clone Jutsu" "Substitution Jutsu"

Aki kept practicing for a while and then activated his Byakugan to focus on chakra control. With Byakugan's aid, his training progressed faster than ever.

Leaving him to once again wonder… why was Hyuga clan so weak. They can train faster than anybody. Not even Naruto or Sasuke would be able to match them if they really went most efficiently.

Probably just another clan that faded into history in the name of tradition.

Sigh,

The thought lingered as he fell asleep, but before he knew it, a booming voice jolted him awake.

"WAKEY WAKEY," A came in the morning, intending to spend time with his son today.

Aki woke up groggily at his voice. This was a straightforward family… if you don't wake up, you get thrown into the family pool.

Being Raikage's household calling in C for a checkup was really convenient.

'How blessed… totally better than Konoha'

(

A/N:

Author: stop flexing

Aki: Get used to it

)

"Today I will be taking you to training with me," A said enthusiastically as he picked Aki up.

'I'm seriously tired with everyone picking me up… time skip no jutsu when?'

A brought Aki to the training arena where Haruka and Kaela were both present.

"Today, I'll be training you in taijutsu," A. announced. "Haruka will handle your chakra control as usual, and Kaela will oversee your Bukijutsu training."

Introducing his new training instructor composition, A activated his lightning cloak and started moving fluidly, almost like a dance.

Aki was puzzled by the slow, deliberate movements, especially with the lightning cloak boosting A's speed.

"What are you standing there for imitate and dance," A said sternly.

Well, whatever the movements being made slowly, made it easier to follow, activating his Byakugan he began to follow and imitate.

Even though Aki couldn't copy this chakra flow for now he could start memorizing it. Byakugan isn't like the Sharringan that uploads the entire movement-set into your brain and muscle sensation for the jutsu.

Byakugan users have to do the hard work themselves, memorize the chakra flow, to be able to copy a jutsu, this is what he realized after Kaela's teaching yesterday.

'As long as I have a good teacher and/or if I can observe a technique multiple times, I can master It', Aki thought.

Basically, you're better at learning the jutsu than normal Humans that's all. Of course, Aki now plans to integrate memorization exercises as part of his daily routine.

Does this make Byakugan a useless Dojutsu? No, it doesn't you still have 360° vision, cheat code to improve your chakra control… Neji had the best chakra control in Konoha 13 till end of Shippuden.

Neji never became a Kage-level ninja he died at Jonin level… but still had better control than Hokage Naruto.

Anyway, back to the training.

Aki imitated the movements of A, there was slight clumsiness in his moves but Aki was getting the grip.

After a few hours, all 4 found themselves at the bottom of the cliff, where Aki would run on the mountain starting today for his chakra-control training.

He was previously climbing the mountain or in the words of Haruka, "crawling." 

"Byakugan" "Shadow Clone Jutsu" Aki summoned his clones and started climbing, refining his chakra control with every step.

The rocky surface made climb treacherous, any misstep, lag in focus, or wavering of chakra could send him tumbling down.

SPLASH.

There was no safe zone today, Raikage would catch him before he drowned and made him run again.

After 3 hours of abusive training, almost drowning, and then repeatedly running over the mountain.

Next was Bukijutsu training with Kaela.

"Let's start with kunai throwing," Kaela said as she demonstrated her technique. Aki picked up his kunai and following instructions, he threw it at the target… missing it by a large margin.

For hours, they practiced. Aki's throws improved slightly; He was getting better at it but it wasn't enough. His frustration gnawed at him.

'Here I was getting arrogant over Shadow clone jutsu… I can't even throw a kunai'

Aki felt amused and embarrassed by his earlier thoughts…

But there was pride too. Most ninjas start their training in the academy or by their clan… and even having a Chunin explain things during childhood is rare for most.

And here he is training under three Jonin and the Raikage himself… he can totally flex over the students of the legendary Sanin in the future.

'Epic village… I love Kumogakure. I'm living the life Naruto would have if he wasn't neglected by his Godfather aka Pervy Sage Jiraiya`

As long as A the 4th Raikage is around, Aki's smugness reaches its peak.

As the sun dipped below the horizon, Aki collapsed on the training ground, muscles aching but mind clear. The path ahead was long, but with each step, he could feel himself inching closer to his goals. Soon, it will be time to see how far I've come.

But Raikage wasn't done with him today. He picked him up—again—and brought him to the restaurant.

"Give us 3 barbeque and 4 servings of takoyaki," A. ordered in his usual commanding tone.

All four of them were starving. Even though Kaela had prepared some light food during their rest time, it had done little to satisfy their hunger after the intense training session. The sight of the steaming hot food on the table made their stomachs rumble in unison.

As soon as the food arrived, they picked up their chopsticks and started wolfing down the food, the savory aroma filling the air.

"That hit the spot," A commented, leaning back with a satisfied grin, his plate already empty.

"Delicious," Aki added, his mouth still half-full as he tried to speak and eat at the same time. He was finally feeling the reward for all the hard work he'd put in today.

Kaela, as expected, ate her food slowly and methodically, her expression calm and detached.

She didn't engage in the conversation but simply observed the overeager duo across the table, her face betraying nothing of what she thought.

Haruka, on the other hand, couldn't help but smile at the sight of the Raikage and his son devouring their meal like they hadn't seen food in days.

It was rare to see A so relaxed, and it was clear how much he enjoyed these moments with Aki.

"You two eat like you're in a contest," Haruka teased, her eyes sparkling with amusement as she daintily picked up a piece of Takoyaki. "You'd think the Raikage would have better table manners."

A paused mid-bite and gave Haruka a mock glare. "Training a future Raikage requires energy, Haruka. We're just… replenishing our reserves."

"Exactly," Aki chimed in, mimicking his father's serious tone but failing to hide the grin tugging at his lips. "Ninja training is no joke!"

Kaela remained silent, focused on her meal, her expression unchanged. She seemed unfazed by the banter, content to let the others talk while she quietly enjoyed her food.

Haruka noticed Kaela's silence and turned to her with a playful smile. "Kaela, aren't you going to say something? Maybe offer some advice to these two on proper dining etiquette?"

Kaela glanced up briefly, her expression as cool as ever. "As long as they don't choke, they're fine." Her voice was calm and measured, almost indifferent.

Aki almost choked on his Takoyaki at her sudden comment, causing everyone at the table to burst into laughter—except Kaela, who simply continued eating as if nothing had happened.

TIME SKIP NO JUTSU – 3 years

(A/N: Aki is older than Naruto by 3 years... cause I don't want him to be 13 during world war.)