A few days had passed since Eiji was initially introduced to taijutsu and chakra by his father. Eiji had been spending a lot of time in the training grounds near the Uchiha compound, aiming to perfect the Beginner's Fist.

'I have the movements memorized, but my body feels too frail to perform them effectively. All my attacks are far too slow and powerless, and I'm not even flexible enough to do the kicks! My father definitely knew I'd need to improve my body in order to perform this taijutsu. He must've not told me, anticipating I'd quit straight away and not bother learning it. Now I'm already too deep in! I've come too far to quit. That damn geezer!'

Realizing he'd now have to create a training regime to strengthen his body, Eiji began testing his physical limits in multiple exercises. He tested his max reps in push-ups, pull-ups, sit-ups, squats, and how far he could run without stopping.

'Oh man.. This is appalling, it's not even funny. I guess I am only four years old, but seriously this is not good. At this rate, I won't be able to master the Beginner's Fist, let alone be able to create my own taijutsu style.. I guess there's no point sulking, I've got to improve!'

Feeling slightly hopeful, Eiji began creating a new regime.

'I'm only able to currently do 5 push-ups in one go, so if I do 5 reps of three sets and increase my reps over time, I should be able to build strength and endurance. I'll also do 3 sets of my max rep for each exercise, and as for my run, I'm only able to run for 300 meters without stopping. If I can increase that slightly by 50 meters every few days, I should be able to reach 1200 meters in no time!'

Having set up a new goal for himself, Eiji put his taijutsu training on pause and began strengthening his body. To his surprise, his body seemed to be adapting much quicker to harsh training compared to the body of his past life. By the end of the training, Eiji sat in place, deep in thought. For some reason, his body wasn't as sore as he expected it to be. It was almost like he had taken a nap and his body had slightly recovered already.

Intrigued and excited to test out the limits of his new body, Eiji decided to do his whole training routine again. To his surprise, he was able to complete the routine a second time, although it was much harder than the first.

'Ahahah.. HAHAHA NO WAY! How is this even possible? I can't wait to see how far I can push this body. Is this due to chakra? I read about the Keirakukei and Tenketsu, but it doesn't mention strengthening the body. It only talked about how directing chakra to certain points of your body can increase your physical prowess. I guess for now I'll just think of it as a difference in physiology between those in this world and my old one.'

Content with his training for the day, Eiji stood up ready to leave when he felt a force ram into him. Having just stood up, Eiji had no time to stabilize his balance. As a result, he was sent crashing into the ground. Looking up, he noticed three kids slightly older than him, all wearing crude smiles as they watched the boy on the floor. The one in the middle was much taller than the other two.

"Watch where you're going, loser!" the one on the left laughed.

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They all simultaneously began laughing at the childish joke. Eiji, not interested in getting into it with three bothersome kids, tried to walk past them when they attempted to barge into him again. Eiji easily dodged the predictable attack, moving out of the way in time for the aggressor to fall over.

"Buzz off, brats," Eiji commanded.

The bullies' faces distorted into confusion, then anger. "Brats?! We're older than you!" the one who was now on the floor said.

'Seems like they're getting riled up. It's best if I strike first, otherwise I'd lose for sure if they are trained in taijutsu. They appear to be at least seven years old, so there is a high probability. Also taking into account that they're in the training grounds, they obviously didn't come here just to play tag…'

Taking advantage of his upper hand, Eiji twisted his body to face the boy on the ground and delivered a decisive kick to his chin, knocking the boy out. The other two bullies were still in shock, so Eiji took the opportunity to land another clean punch to the face of the one who made the bad joke.

'Hehe, looks like I busted his nose. Everyone who hasn't seen a ton of their own blood dripping on the ground is usually stunned for a while. I know because I've broken my nose before riding my bike.'

As Eiji went in for another punch with his hand cocked back, the biggest bully of them all, who was standing beside the boy Eiji was aiming to punch, delivered a switch kick to Eiji's temple. Eiji dropped down to one knee, his head ringing and his sense of balance lost.

'I hate losing these sorts of fights. And to kids nonetheless! So frustrating.'

The largest of the group pushed Eiji to the ground and mounted him, balling up his fists, ready to pummel him.

"Why don't you stop there?" A voice Eiji didn't recognize said. A boy who looked to be around the same age as Eiji's assailants jumped down from a tree and walked towards the group.

"Do you understand who you're putting your hands on?" the newly arrived boy spoke.

"Sh-Sh-Shisui Uchiha... We're sorry, we didn't mean to…" the large boy stuttered.

'Oh I see, saved by a fellow clansman! I really thought I was done for. Do people even get reincarnated twice? I mean, I doubt I would've died from the strikes of a child anyway.'

The large boy stood up, getting off Eiji, and the one with a bleeding nose helped Eiji up.

"Looks like he did a number on you guys. How did two of the three get taken out when it was a 3v1?" Shisui taunted the bullies.

The biggest of the three clenched his fist once more, biting his lip and beginning to shake in rage. "Watch your mouth, Shisui," the boy roared.

Shisui threw a shuriken that skimmed past the boy, then proceeded to pat the large bully on the shoulder. "Calm down, getting angry like that isn't good for your health," he said in a fake concerned tone.

'That's some serious shuriken throwing ability. When I threw one at my father, it looked nothing like that.'

Having not understood the threat, the boy slapped Shisui's arm off his shoulder and shoved the Uchiha back, getting into a fighting stance. "Screw you," the large boy yelled.

Shisui's eyes changed form and began to glow red, with a three-tomoe pattern emerging.

"Kenta, just leave it alone! We started it anyway. Those eyes... That's not something we can deal with just yet…" the boy with a bloodied nose said.

Begrudgingly, Kenta spat at the ground below Shisui and picked up his friend who was still unconscious.

"Watch out, brat. Don't let us see you again!" Kenta shouted, leaving the training grounds.

'What on earth happened to his eyes...?'

Eiji, who was still dazed from the strike he had just received, stared at Shisui, who had already deactivated his eyes.

"Those eyes, what are those...?" Eiji asked in awe.

"You don't even know what the Sharingan is? You're an Uchiha! What have you been spending your time doing?" Shisui asked, baffled.

'How do I tell him I've been studying the geographical landscape and the political affairs of the world…?'

Shisui, not eager to pry further, instructed Eiji to sit down and began explaining the Sharingan.