Naruto: The Strongest Kakashi

Itachi felt a pain in his arm as the green liquid entered his body.

An unspeakable burning sensation instantly spread from his arm to his whole body!

Itachi groaned and felt a bit of weakness in his body.

"Itachi, this pain is because the Hashirama's cells are starting to invade your body, you have to hold it." Shisui said nervously.

Unlike when Orochimaru was transplanting Shisui's left hand, at this time, the pain Itachi has to endure is much stronger than Shisui.

The transplantation of Shisui's left hand is the result of Orochimaru's research, which is very mature.

So the process of transplantation went smoothly.

After all, there is Danzo who was working together with Orochimaru for that.

The solution used by Itachi is the cells extracted by Shisui and Ochagakure's people from Shisui's left hand, and their research is not as mature as Orochimaru's.

Although the effects are similar, there are indeed many differences in the process of use.

The biggest difference is that when entering the human body, there will be severe pain.

And that kind of pain is unbearable to most people.

At this time, Itachi is suffering from this kind of pain.

Itachi closed his eyes, cold sweat began to appear on his forehead, and his body began to twitch slightly.

But he didn't make any sound at all.

He gritted his teeth and endures this pain silently.

For Itachi, this level of physical pain has long been unable to do anything to him.

He is just a 19-year-old young man, but he has an endurance far exceeding his age.

Maturity represents a kind of responsibility, and wisdom means that you have to bear far more than ordinary people.

Both Shisui and Kakashi can only looked at Itachi in silence.

They didn't say any words of comfort to Itachi. Although their expressions showed that they are worried, they believed that this small problem could not defeat this strong man.

This person who never shows pain to others because he doesn't want to see their worries.

Time passed by, and the twitching of Itachi's body gradually calmed down.

Kakashi and Shisui are both happy when they saw this. Itachi's condition shows that the side effects of the medicine are slowly subsiding, and Itachi has suppressed this side effect.

After a while, Itachi suddenly opened my eyes!

In the scarlet Sharingan, the three black tomoe was connected into one piece, forming the shape of a three spiralling curves!

"Itachi, how are you feeling?" Shisui asked.

Itachi smiled and said: "I feel very good. I can feel that powerful vitality is spreading in my body, healing my body's injuries, and the extra energy is pouring into my eyes. It also offsets the side effects of the Mangekyō Sharingan, and I know has a clearer vision."

Hearing this, Kakashi breathed a sigh of relief and said: "It seems that it is a success."

Itachi nodded. He could feel that his body was gradually returning to its peak health.

If this trend continues, it would only take up to three days for his body to recover to the time before he used Mangekyō Sharingan.

This beautiful feeling made Itachi even felt a little unbelievable for a while.

His body has been sick for too long, so he even forgot the feeling being healthy.

"Itachi, the Hashirama's cells has certain chance of backlash. Although I believe the Uchiha Bloodline can suppress it, you still have to be careful. If you felt something is wrong, remember to contact me with a crow as soon as possible," Shisui said.

"I will. Sorry to trouble you, Shisui."

"Do you still need to be so polite like that to me?" Shisui smiled and patted Itachi's shoulder.

Itachi also smiled.

At this moment, Itachi felt that as if he has returned to the time when he was young.

Itachi and Shisui got along in the woods of Konoha. Itachi was injured and Shisui helped to deal with it.

What Shisui gave to Itachi was not only Ninjutsu and experience, but also more of brotherly care.

Itachi does not have an older brother, but he regards Shishui as his own older brother.

This feeling was something Itachi hadn't experienced for a long time.

He just doesn't know when he can return to his original life.

Akatsuki, masked man, Nagato, these are all burdens weighing on Itachi's body, but fortunately, he is not alone, there are two friends who are fighting alongside him.

Shisui and Kakashi.

"Well, Shisui, Kakashi-senpai, I will go back first. If I leave for too long, Kisame will get suspicious."

Both Shisui and Kakashi nodded after hearing this.

Itachi then disappeared in the woods and continued to wear his mask, living an undercover spy's life.

"Itachi's problem is finally solved. We can finally breathe a sigh of relief."

Shisui stretched out his body and felt that his body was a lot more relaxed.

After learning about Itachi's condition, Shisui had always been worried about it. After receiving the information that Hashirama's cells can treat Itachi, Shisui had been studying day and night with the Medical Shinobi of Ochagakure.

Now, his wish is finally fulfilled.

"Thanks for your hard work." Kakashi said with a smile.

Shisui smiled and said, "It's okay. Now that I am hiding in the dark, I can only do this."

"By the way, maybe there is still something you can help me with." Kakashi said with a smile.

Shisui was taken aback, and asked, "What is it?"

Kakashi smiled mysteriously, and whispered a few words to Shisui's ear.

Shisui's expression showed he was slightly surprised, and then he said: "Really?"

"Of course, I will trouble you about this matter."

"Don't worry, it's no problem." Shisui promised.

Kakashi formed a hand seal to create a shadow clone, and then said: "I can't leave Konoha for too long, so my shadow clone will help you with this matter."

"Okay."

...

Konoha, Kakashi's house, Kakashi has finally returned.

His shadow clone has already left with Shisui for another matter.

Kakashi looked at the green liquid inside the syringe in his hand. This liquid is the remaining solution of Hashirama's cells created by Shisui.

Shisui handed it to Kakashi before he left.

Kakashi looked at the green liquid thoughtfully.

Hidden inside this green liquid is the mysterious and powerful strength of Senju Hashirama.

If someone is injected with this liquid, although they will not become as strong as the Senju Hashirama, this liquid can still enhance their Chakra and body functions.

"Should I use it?" Kakashi murmured softly.

After thinking for a moment, Kakashi shook his head, took out a scroll, and sealed the green liquid into the scroll.

The side effects of this green liquid are too great and it requires Uchiha Bloodline to suppress it.

Although Kakashi has a Sharingan, he doesn't have Uchiha Bloodline. And a Sharingan has already put a lot of pressure on Kakashi's body, so if he injects this Hashirama's cells into his own body, his body would become the battleground between the two and when that happens, his body may not be able to withstand it.

If he became like Danzo, the gain is not worth the loss.

The risk is too great, and Kakashi has no need to take a risk for the time being.

And the harvest is also uncertain.

For the time being, Kakashi decided to wait for his Senjutsu and the Eternal Eyes to be resolved first before considering this issue again.