Naruto: The Strongest Kakashi

Konoha, Root Base!

"Sai, have the previous mission been completed?"

"Yes, it's complete, Danzo-sama."

"Good, this time, there is a new mission for you."

"Please tell me, Danzo-sama."

"There seems to be an abnormal situation around the Fire Temple, so I want you to investigate it."

"Fire Temple? I understand."

"The mission this time is not for you to go alone, and it is not suitable if you go with the identity as a Root's member."

When Sai heard this, he raised his head to look at Danzo, he didn't show any expression, but in his eyes are some slight confusion.

Danzo looked at Sai with half-opened eye and continued: "This time, I will arrange for you to enter Team 7 which was led by Hatake Kakashi. What you have to do is to investigate Kakashi's unusual behavior."

"Investigating Kakashi's unusual behavior?"

Sai was a little surprised when he heard this. After all, as a Root's member, he knew about Kakashi very well.

Sai knew that Kakashi is a very powerful man.

And Danzo asked him to investigate that person?

That is undoubtedly courting death.

It should be known that Kakashi was originally from Anbu, and he is one of the best. In Kakashi's eyes, Sai's spying ability is simply worthless.

"I know what you are thinking. Kakashi is indeed a difficult character to deal with, but I am not asking you to deliberately investigate him. You only need to be careful when participating in the mission. You are the best at disguising, so you are the most suitable for this mission."

Sai breathed a sigh of relief when he heard this, and said: "I understand, Danzo-sama."

"Go, and don't let me down. This may be a long-term mission."

"Yes, Danzo-sama."

Sai half-kneeled on the ground and said with a lowered head.

Danzo watches Sai leaving, and his eye is flickering with cold glints.

"Kakashi, everything has just begun."

...

Hokage Tower.

"Kakashi, there are unknown Shinobi around the Fire Temple. I want you to lead Naruto and the others to see the situation."

"Yes, Tsunade-sama."

"By the way, this time there is someone else that will go with you on this mission."

"There's someone else?" Kakashi felt that it is a bit strange.

"Come in."

Tsunade said softly.

The door was gently pushed open, and soon, a young man in a short black-and-grey jacket and black pants appeared in front of everyone.

His skin is translucent-looking pale, and on his back is a tip-less tantō.

The newcomer is Sai.

"This is Sai, a member of the Root," Tsunade said.

"Hello, Kakashi-senpai, I'm very happy to be able to do things under your order."

Sai said, with a smile on his face.

Kakashi frowned slightly upon seeing this, 'What's going on? Why did Sai join Team 7 at this time?'

'Sasuke is still here, so why is he coming here?'

Sai seemed to have seen the doubts on Kakashi's face, and still with a smile, he said. "Kakashi-senpai, I am familiar with the terrain of the Fire Temple, so I can help you complete this mission."

When Kakashi heard this, he looked at Tsunade.

Tsunade looked gloomy, and then said: "Yes, Danzo said that Sai is very familiar with the Fire Temple, so he sent him to help."

"Is that so? Then thank you very much, Sai, right?"

"Yes, Kakashi-senpai." Sakai said with a smile.

"After one hour, gather at the gate of Konoha."

"Okay, Kakashi-senpai."

After Sai finished speaking, he left the Hokage Tower.

"Tsunade-sama, what's going on?" Kakashi asked in confusion.

It should be known that a Shinobi's team is usually a team of four and rarely changed.

But now that Sai was added inexplicably, no wonder Kakashi was confused.

Tsunade shook her head and said: "This incident was discovered by Danzo. He said that he want to send you to investigate about this matter. At the same time, he also arranged for Sai to help you. Sai's abilities are indeed helpful for this mission. Although it feels a little strange, I can't refuse it. After all, Danzo is still an elder of Konoha."

Kakashi was a little silent when he heard this.

Danzo has been very quiet since he fell into Kotoamatsukami.

'Why did he arrange this kind of thing suddenly?'

'Could it be that there really is something strange in this mission to the Fire Temple?'

After thinking for a while, Kakashi still didn't know the answer.

"I understand, Tsunade-sama."

"Good, Kakashi, be careful."

"Yes, Tsunade-sama."

Kakashi left the Hokage Tower and was still thinking about it.

"Forget it, let's just see what this Sai is going to do." Kakashi couldn't think of the answer and can only give up for now. He will just wait and see what this Sai is going to do before thinking about countermeasures.

Kakashi has enough confidence that under his nose, this Sai can't do much.

After notifying Sasuke and the others, Kakashi came to Konoha's gate, but he did not expect that Sai had already arrived.

"Kakashi-senpai." Sai exclaimed respectfully.

"You came very early."

"I was originally already prepared, so I came straight here."

"So it's like that."

Kakashi looks at the smile on Sai's face and felt slightly uncomfortable.

Such a smile, if someone looks at it too much, they will really get bored.

'Sai is also a good Shinobi, but it's a pity that he followed the wrong person at first. For now, let's look at the situation afterwards.' Kakashi secretly thought.

Kakashi ignored Sai again, and leaned against the gate on the side and took out "Icha-Icha Paradise".

When Sai saw Kakashi is reading a book, he can't help but look at Kakashi.

'He looks lazy, but he's terrifying when he takes action. Is his usual appearance a disguise? What kind of person is this Kakashi who can make a name for himself in the Shinobi World?" Sai secretly thought.

At this moment, Kakashi is reading a book, and Sai is studying Kakashi. The scene is very harmonious and calm.

But it didn't take long before this calm was broken.

"Kakashi-sensei! Is there a new mission this time?"

Naruto's shout came from a distance.

Kakashi raised his head and saw that Sasuke and Sakura were behind Naruto.

Kakashi then put back "Icha-Icha Paradise" back to his ninja back, looked at the time, and knew that it was almost time.

The three soon arrived and saw Sai who is on the side.

The three were somewhat confused after seeing Sai. 'Why is there a stranger standing next to Kakashi-sensei?'

"Kakashi-sensei, who is this guy?" Naruto asked.

"A tag-along on this mission, Sai."

"Sai? He looks like Sasuke-kun," Sakura muttered.

Hearing this, Sasuke frowned and looked at Sai.

"Hello everyone, my name is Sai. I am very glad to meet everyone." Sai said with a smile on his face.

When Sasuke saw Sai's smile, his frown became deeper.

'What is going on with this guy? Why does he feel so hypocritical?''

Naruto and Sakura also have the same feeling and feel that something is wrong.

"Our mission this time is to go to the Fire Temple, the largest temple in the Land of Fire. Sai is very familiar with that place, so he will show us the way."