The Ultimate Rat In The World of Ninjas!

"It seems I have to get serious if I don't want to be defeated by a fresh Genin." Kakashi sighed inwardly.

He didn't expect to encounter such a student when he became a teacher.  

"I am coming!"

Naruto yelled and rushed.

This time he didn't attack with a speed that was close to teleportation but fought with Kakashi with normal and with basic physical skills. Only in this way could Naruto have a clear understanding of his strength.

Boom!

Kakashi raised his hand to block but was kicked away by Naruto's kick.

 "What?!" Kakashi was shocked.

"How is this possible?"

The same was true for Sasuke and Sakura, who exclaimed in shock, and didn't care whether they were exposed or not.

"This strength, does Naruto know the Chakra Enhanced Strength of Tsunade-sama?"

Kakashi was taken aback.

As far as he knew, Tsunade hadn't been back for several years, so there was no way Tsunade had taught him.

It couldn't be the Taijutsu taught by Guy too.

If Guy had taught him, then Naruto's level should be about the same as that of Guy's disciple Rock Lee.

"Is it because of the unique physique of the Uzumaki Clan?"

Kakashi put aside his book and took Naruto seriously.

After all, this strength could not be easily resisted, especially if Kakashi was not careful, Kakashi would be injured.

After Kakashi got used to Naruto's strength, he started thinking about Naruto's changes while fighting Naruto.

Fortunately, because of his relationship with Guy, he had a wealth of experience in Taijutsu sparring. Although Naruto's kicks hurt his hands and feet, it was just a matter of greater strength. In terms of moves and skills, Kakashi beat Naruto hands down.

...

"This... what is this!?"

Sakura stared dumbfounded at the two figures moving around in the field, the movements were so fast that she couldn't see clearly.

The air shocks generated by the collision of the two scared Sakura, she didn't think her body could handle a punch from them.

As for Sasuke, his face was even more ugly.

Before, he thought that there was not much difference in strength between him and Naruto, and he thought that he would catch up soon, but he was still complacent, and the scene in front of him completely shattered his self-confidence.

"Naruto you bastard!"

Naruto also felt sorry for Sasuke. It was not that he was holding back before and Sasuke also grew up very fast. After all, Sasuke's talent was also good, so Sasuke felt that he had caught up with Naruto because Naruto had been using only Taijutsu against Sasuke.

As for the addition of the Ninjutsu...it was not going to hurt Sasuke's, young heart.

In addition, what happened today was really out of Sasuke's expectations.

Without knowing what Sasuke was thinking, Naruto on the other hand was very excited at the moment, and couldn't wait to try the new power he had acquired, and it happened that Kakashi was a good opponent, and could help Naruto familiarize himself with his body, killing two birds with one stone.

"Iron Shot!"

When Kakashi heard Naruto's words, his heart skipped a beat, and he immediately formed a seal and used the Body Replacement Technique again.

Kakashi would have vomited blood if was kicked with such force.

This was the benefit of knowing the ninjutsu, which could avoid a lot of damage.

And after Naruto used the Iron shot technique, he found that this chakra-driven leg method was not as fantastic as in the original anime series, at most, its strength and speed were several times the power of Leaf Hurricane.

Coupled with Naruto's peculiar power, it was equal to or even better than the effect Guy used.

"Fu~ that was dangerous~"

Kakashi wiped his sweat.

Naruto's physical skills were also too strong, he can parry it mainly because he was strong enough. He tried his best to fight for so long, but his hands and feet were in pain and swollen from Naruto's attacks.

Moreover, he used more skills to remove Naruto's strength. If he insisted on taking it head-on, he would be even more unable to hold on.

"Kakashi-sensei, the warm-up is over, let's get serious!"

"..."

'Just warming up? Wasn't this your best?'

At this moment, Kakashi even saw Guy's shadow from Naruto.

"Iron Shot!"

Naruto used the strength of his legs, and as fast as a meteor, he came to Kakashi in an instant and kicked him away.

"Damn..he is forcing me to work hard…"

Kakashi complained extremely depressed, if he hadn't promised not to use ninjutsu, Kakashi had a hundred ninjutsu that could teach Naruto a lesson, but in terms of physical skills, it seemed that there was only one.

And for Naruto to get a good workout, Kakashi couldn't blindly dodge, he could only use force.

"Eight Inner Gates—First Gate! Open!"

"Shadow of the Dancing Leaf!"

boom!

Their legs collided violently in the air, and a wave of air broke out that was stronger than before, and Sasuke and Sakura couldn't open their eyes.

"Eight Inner Gates?"

Naruto withdrew his legs and lowered himself to sweep his legs.

Kakashi jumped high and kicked down.

Naruto raised his foot on top.

Bang, the two backed away.

Then they fought again, not to mention Sakura, even Sasuke couldn't see the movements clearly, at least he could see a little bit before.

...

After a while, the two stopped.

Kakashi took a deep breath, opening the Eight Gate was still very labor-intensive, this was a move that overloaded the body's energy and was used to increase attack power and speed.

He didn't plan to use it, but Naruto's power made Kakashi very uncomfortable. He is a ninja proficient in many ninjutsu, and he couldn't stand this physical confrontation. If he knew it, he would tell the Third Hokage to let Guy take Naruto as his student.

Such an excellent physical talent, it would be a waste not to recommend him to Guy! 

"Okay, it's over. Kakashi-sensei, I am done."

Naruto relaxed his body, he felt that through the battle just now, he had adapted to his current strength.

Fortunately, Kakashi was very resistant, allowing Naruto to use his strength without any reservations to quickly get a grasp on it.

"You are done?!"

Kakashi looked at Naruto with an ugly face.

'I opened the eight inner gates and you tell me it's over?'

'Don't you know that after I open the Eight Inner Gate, my body goes into extreme hyperactivity?'

'Do you think it's over just because you say it's over?!'

"Take this!"

...