Naruto: Chakra System

Naruto was sent flying from Kakashi's kick, slamming onto the ground, groaning in pain, clutching his stomach. Naruto immediately got up, tucking his sleeves up, and rushed towards Kakashi, yelling, "I'll totally kick your ass!!!"

Kakashi glanced around at where Sasuke and Sakura were hidden and then at Naruto, who was rushing at him. He sighed. "You still don't understand what I said about the test? Really, knucklehead!"

Kakashi casually fixed the bell on his waist and put his hands in his pants pockets. With a simple backflip, he again kicked Naruto in the guts. "Are your ears clogged? Because my words don't seem to be getting through your ear and didn't reach your brain."

This time, he used more force behind his kick, sending Naruto slamming into a tree a few meters away. Naruto coughed, this one hurt a lot, but he was an Uzumaki; he wasn't going down this easily, and Kakashi knew that.

Naruto once again stood back up, but this time, he didn't rush towards Kakashi. Instead, he made a hand sign and created many Shadow Clones, and then rushed towards Kakashi.

Kakashi still glanced to the side where Sasuke and Sakura were and sighed; they still hadn't moved. Kakashi then, with swift movements, struck each Shadow Clone of Naruto and dispersed them within a few seconds.

Naruto was momentarily dumbfounded; all his Shadow Clones immediately vanished as if they were never there to begin with. Kakashi looked at the dumbfounded Naruto.

Naruto, sensing his gaze, snapped out of his stunned look and jumped to kick Kakashi. Kakashi lowered his head, sinking onto his legs as he dodged Naruto's kick.

Then he quickly moved back and punched, which Kakashi easily dodged, positioning himself behind Naruto, catching him off guard. "Huh!!" Naruto was surprised, staying in the same position, while Kakashi sat behind him, forming the Tiger Seal, ready to strike Naruto.

Hidden behind the leaves of a branch, Sasuke scoffed at Naruto's actions, calling him an idiot, but he himself didn't try to team up with him. But once Kakashi made the Tiger hand Seal, he frowned a little and thought, 'Is that a Fire Release hand seal? Is he finally getting serious?'

Naruto on the ground, stood in same forward-leaning, startled pose, while Kakashi was smirking under his mask. "Looks like this Jutsu is actually made to be used primarily on you," he said.

Sakura also frowned from her hidden spot and thought, 'H-he, is he going to use a Jutsu against Naruto?'

Whoosh!

Kakashi extended his hand in the Tiger seal form, moving with fast speed towards Naruto's backside as he declared, "Take this, Konoha's most forbidden Jutsu, Thousand Years of Death!"

With this powerful blow on Naruto, he sent him flying like a cannonball into the river nearby in Training Ground 3. Kakashi laughed lightly, seeing Naruto launched away and drop into the water.

Sakura's eyes twitched as she realized the true nature of Kakashi's Jutsu and thought, 'That was just a very strong ass poke... This isn't even a Ninjutsu!'

Sasuke, peeking from behind the tree, wore a disgusted expression on his face as his initial expressions about Kakashi changed slightly. But he quickly stiffened as, just like yesterday, Kakashi's Killing Intent made him feel uneasy.

The same was the case with Sakura, who also frowned. Kakashi had no plan on failing them anyway, but he had decided to make them understand the need for teamwork, rather than having them waste time on missions in the future and gaining understanding then.

Since, Kakashi didn't want, all that same Sasuke's betrayal and Naruto, Sakura running to find him and such. He said in a cold voice, "You aren't taking this test seriously, I suppose! But whatever, that's your problem. You don't have all day, you know that, right?"

Sweat formed on Sasuke's face, feeling intimidated by Kakashi's Killing Intent, and he was also looking in Sasuke's direction. Suddenly, a shuriken moved towards Kakashi's face, which he easily caught.

He looked in the direction from where this shuriken came out and saw that Naruto had jumped from the river, and not alone, but with many of his Shadow Clones. But Kakashi wasn't standing idle, and just like before, he moved swiftly and struck Naruto's clones, vanishing them instantly.

Naruto was once again left dumbfounded. He was about to attack Kakashi but now remained standing in a stunned look.

Kakashi put his hand on Naruto's shoulder from behind and said, "A shinobi should never let the enemy catch them from behind."

With that, he punched Naruto in his back, sending him flying, slamming into a nearby tree. This time, the force behind Kakashi's strike was even more than before, and Naruto spit a little blood as he looked at Kakashi warily.

Naruto complained, "Didn't you say you wouldn't attack? Then what is this?"

Kakashi narrowed his visible eye and said, "Didn't I also say, if I don't see you working as a team, then I will kick your ass? That's why I said, your ears are clogged."

Then Kakashi looked back at him and smiled under his mask as large flames ball came towards him. This showed that Sasuke had decided to move, but not only him; even Sakura, from the same direction she was hidden in, moved closer and tried to use Genjutsu on Kakashi.

Kakashi, true to his words, didn't use any Jutsu this time but dodged Sasuke's Fireball Jutsu. He used Body Replacement Jutsu and swapped places with a small rock from some distance.

Sakura's Genjutsu was too weak to affect Kakashi, so he looked back at Sasuke's side, who then threw a few shurikens at him. Kakashi took a step back to dodge them, but at the last moment, they changed their trajectory, interacted with each other, and flew towards Kakashi's behind.

But Kakashi wasn't very surprised; he had already fought against a better Uchiha's Shurikenjutsu user, Itachi, during the ANBU.