Reborn into Naruto World with Tenseigan

Early Morning of the next day.

Both Shisui and Itachi came to the Forest of Death as per Kuroto’s instructions.

They searched for Kuroto, and soon found him asleep on the branch of a tree, Shisui looked at Kuroto’s sleeping posture and suddenly had an idea.

Shisui motioned Itachi to not make any sound as he drew out a Calligraphy Brush from his pocket.

Itachi wanted to speak to Shisui that this is not a very good idea, but seeing Shisui’s look, Itachi chose to remain silent.

Now with the Calligraphy brush in his hand, Shisui took silent cat steps towards Kuroto, making sure that he did not make any sound lest he wakes up Kuroto, and shortly he was standing in front of the sleeping Kuroto.

Now standing before Kuroto, Shisui motioned his free hand to and fro, in order to make sure that Kuroto was really sleeping.

After confirming that Kuroto was indeed asleep, Shisui snickered and without any wait, he raised his hand to give Kuroto’s face a nice touch of art.

Shisui motioned Itachi again to make sure that he does not make any sound, all while bringing the brush closer to Kuroto’s face, and just as he turned back towards Kuroto; Shisui noticed that Kuroto’s eyes were wide open and Kuroto was looking at him with a deadpan expression, “Shisui, what do you think you are doing?”

Shisui’s hand stopped midway, and he blinked two times to realize the situation he was in, sweat poured out of his face and he jumped backward in panic, “Kuroto-San, you are awake!!!?” Then while trying to hide the brush in panic he said, “I… I thought you were sleeping… and…”

Itachi sighed, “I had known that this was a bad idea.”

Kuroto yawned and stood up, after stretching his body to get rid of all the sleepiness, Kuroto said to Shisui, “It’s early morning and you are already so lively.”

Shisui nodded, “Y… yeah, it’s such a lively day, isn’t it?” just to make sure that Kuroto does not pursue the matter earlier.

And of course, Kuroto did not pursue it, Shisui is nervous, Kuroto can see that, and if a bit of humor and prank can help Shisui calm his nerves then it’s all fine and good with him.

“Anyway, putting aside your childish antics, I hope you are ready for the implantation operation.” Kuroto said to Shisui.

At the mention of the operation, Shisui’s face turned serious, and he nodded, “Yes.”

Kuroto nodded and jumped down from the tree, and started weaving hand signs.

Shisui also jumped too, and looking at Kuroto weaving hand signs in front of the tree, he asked with a confused tone, “By the way, Kuroto-san, why to call us to the Forest of Death?”

Kuroto answered Shisui’s doubts, “Implantation operation can not be carried out at your or my home, it would be too risky, as such we are going to perform it here.”

“Here?” Shisui muttered.

Kuroto nodded, “Here was a Secret Laboratory of mine, but since we acquired Ancor Vantian, so I transferred the Laboratory to the Sky Fortress, but it’s still a secret hideout as this place was never found by anyone because of how cleverly it has been hidden. A perfect place to carry out the operation while still remaining in the village.”

Itachi raised his brow upon hearing Kuroto’s words.

He still remembers that the Genin Team he was part of once had a mission of killing a very dangerous and ferocious Wild Boar that was disturbing the Food Chain in the Forest of Death because of how much it ate, and Itachi remembers that Kuroto happened to be present here at that time, and took it upon himself to take care of that Wild Boar.

At that time, Itachi didn’t think about it too much, as it isn’t strange for a Konoha Shinobi to be present in the Forest of Death, after all, this place is not only a sight to carry out Chunin promotion Tests, but also a training field for frequently used by many shinobi.

Not to mention, this place is also used for acquiring materials for brewing poisons and other medicines.

And now that he is hearing of the Secret Laboratory, Itachi can’t help but think, ‘It seems that it wasn’t just a coincidence that we encountered Kuroto-san at that time, Kuroto-san had prepared a secret hideout here.’

At this time, the entrance inside the tree opened, and Kuroto walked inside followed by Shisui in tow, before both of them went inside completely, Kuroto said to Itachi, “Itachi-kun, the implantation operation may take a few hours, during this time, neither I nor Shisui will be in any condition of helping out, so please guard the entrance and make sure that no one interferes.”

Itachi nodded courteously, “I understand Kuroto-san, please make sure that the operation is carried out successfully, you needn’t worry about anyone interfering.”

Kuroto nodded, “Hmm.” Then started to walk deeper inside the laboratory.

And just as Shisui was about to follow Kuroto, Itachi said to him, “Be careful Shisui-san.”

Shisui turned back and asked with a smirk, “What is it I am seeing here Itachi, are you worried about me?”

Itachi neither nodded nor denied.

Shisui just smiled and waved his hand, “Fear not my friend, I shall prevail in this battle, and beat the lady of death before she can take my heart.”

‘He is being unusually poetic and funny, this is not like Shisui-san, no doubt about it, Shisui-san is indeed nervous about what’s to come.’ Itachi thought as he looked at the fading backs of Shisui and Kuroto and the entrance to the hideout being closed.

And with both Kuroto and Shisui gone, Itachi jumped over the tree and sat there watching the surroundings, at the same time he spread his crows to help him keep watch over the surroundings.

It didn’t take long and the entire forest of Death was already under his watch.

…

Inside the Secret Laboratory.

While walking through the passageway which was lit with several fluorescent lamps, Shisui’s mind was filled with various thoughts.

Just from one look at how deep the passage goes, Shisui can’t help but sigh, “I never expected that the Secret Laboratory you have here would be so big Kuroto-san.”

Shisui’s eyesight may have almost deteriorated, he was still able to see and sense many things, after all, his perception is still top-notch.

Kuroto while walking in front nodded indifferently, “It’s nothing strange.”

“Is it really?” Shisui sighed lightly.

After a while, both Kuroto and Shisui arrived in the operating room.

This operating room was been neatly rearranged by Kuroto, all for the purpose of the implantation operation. A lot of money was spent by Kuroto for making sure all the instruments were present.

Looking at the various medical instruments in the operating room, Shisui was stunned, “Kuroto-san, isn’t this just an implantation operation? What need there is for so many instruments, they are kind of making me more nervous.”

Kuroto motioned Shisui to down on the bed and started to explain, “There is nothing to be nervous about, these instruments are placed here to keep your real-time vital signs in check during the implantation operation.

There is a Cardiac Meter to measure heart rate, a Pulse Oximeter to keep the Pulse in check, then there is a Respirometer as well as an oxygen supplier, a Blood Pressure Monitor to measure your Blood Pressure, additionally, there is a thermometer, a body water level measurer and a few other devices.

Obviously, all of these are not necessary, but I have arranged them to make sure that everything goes without a hitch.”

Shisui nodded.

At this time, Kuroto took out an injection, added a few medicines to it, then injected it directly into Shisui’s bloodstream, while explaining, “This is an intravenous injection, and the fluid it contains is a potent cell activator… For successful cell implantation, a cell activator is necessary.”

“A cell activator, is it?” Shisui muttered as he suddenly started to feel something in his bloodstream and the entire circulatory system.

After completely injecting the fluid, Kuroto threw the injection into the trash can, and said, “It would take about 2 to 5 minutes for it to have full effect, in the meantime, change your clothes into the patient gown.”

…

5 minutes later.

Shisui did as was told, and after changing into a patient gown, he was currently lying on the bed made out of stone.

After preparing a few other things, Kuroto said to Shisui, “Now that almost everything is ready, let me first introduce the complete procedure to you.”

Shisui nodded with a distracted expression because the cell activator was giving making him feel extremely hot, so hot that even though this operating lab is extremely cool, Shisui was still sweating heavily.

Kuroto said, “In the First Step, I will remove your Mangekyou Sharingan and replace them with the pair of Eternal Mangekyou Sharingan…”

The distracted Shisui nodded at first, but the very next moment, he realized what Kuroto had said and instantly sat up in surprise, “What!? But why? This is a Cell implantation Operation, so why those eyes?”

Kuroto patiently explained, “Your eyes are completely blind, so I am afraid that with your current Occular Power you will not be able to suppress Shodaime-sama’s Cells, so to make sure that nothing goes wrong, I will implant Eternal Mangekyou Sharingan.”

Shisui asked, “But will Tsukihi agree to it? After all, the Eternal Mangekyou Sharingan is already in her…”

Tuk…

Shisui hadn’t even finished speaking, and Kuruto had already placed a small Nutrient Capsule on the table on the side.

Shisui looked at the Nutrient Capsule and noticed the pair of eyes floating inside the glass capsule, and he didn’t know what to speak anymore.

Kuroto patted Shisui’s shoulder and motioned him to lay down, as he said, “Don’t worry, Uchiha Tsukihi is a selfless girl and she is happy to lend the eyes to you, in fact, knowing that your operation was about to be carried out, she approached me on her own accord and presented me with the idea of using these eyes. To make sure that you survive.”

Shisui said sincerely, “Kuroto-san if I don’t survive, please thank her in my place for all that she has done and is doing for the Uchiha Clan.”

“I would rather not, do that yourself. Which means that you are not allowed to die.” After a pause here, Kuroto explained the further steps, “So after your eyes are replaced in the first step, for the second step I will inject a Fusion Solution inside your body. The Fusion Solution is made of a few special drugs and will cause you some pain, but you must endure the pain because this is necessary for successful implantation.”

“After the first two steps, we will have the third step, in this I will inject specially treated Shodaime-sama’s Cell inside your body, what you must do is use your own ocular power to suppress them and make sure that they do not take over your body completely else it would mean death by becoming into a tree,” explained Kuroto.

Shisui nodded, “Alright.”

Kuroto added, “One thing I want you to keep in mind is that I am not going to be using any anesthetic agent in the entire implantation operation so that you can fully use your Ocular Power and sense the changes going in your body. So, bear in mind that the pain you feel will be extreme. It would be so unbearable that you would rather want to die. But you have to survive.”

Shisui nodded, understanding what Kuroto was implying here. Shinobi are trained to endure pain. Cuts, wounds, fractures, muscle tearing, and other kinds of pain can be easily ensured by them and there is no need to even mention those things. So, the fact that Kuroto mentioned it and emphasized the term ‘extreme pain’ must mean that the pain will be higher than what he as a trained shinobi can endure, but he must endure, and not only he must endure, he must prevail over it.

Kuroto informed him of this in advance to make Shisui prepare himself psychologically.

“Yes.” Shisui nodded, he is very confident in his pain tolerance limit.

At last, Kuroto said in a deep voice to make sure that Shisui pays attention to his words, “Remember that Hashirama Cells are more cancerous than any kind of tumor, and they take over their target extremely fast, faster than what the human mind can work. Some time, ago, I managed to get my hands on the experimental data of the Hashirama Cell Implantation experiments and operations carried out by the village. All records point out that no matter how strong-willed of a person the subject was, in the face of Hashirama Cells, he/she couldn’t endure.

Dementia, Hypersalivation, Hyperhidrosis, temporary failure of the sensory nerves, Urinary Incontinence due to losing control over the bladder, and Feces Incontinence due to loss of control over Bowel Movements, are some of the things that you will experience aside from pain, there is also a possibility that you will turn into half-human, half-tree like creature if you don’t pay attention. So be careful.”

Shisui heard Kuroto’s words, and asked with a dazed expression, “Uh… is that why you instructed me to not intake water or food for the past two days?”

Kuroto nodded, “Yes, so anyway, what I am implying is that be careful, ahead is a battle of life and death.”

Shisui asked again, “But did you not say that the success rate is hundred percent?”

Kuroto nodded, “It is, as long as you are able to preserve, if you, yourself are unable to preserve and give in, then there is nothing I can do about it.”

Shisui was silent and after taking a deep breath, he nodded, “Alright, I have too much to protect, I would never be able to forgive myself if I were to die on an operation table, so death is not even an option here.”

After understanding Kuroto’s words, Shisui let go of all the fear, nervousness, and anxiety, and his expression returned to calm and collected as if he was present on a battlefield.

Kuroto took a look at Shisui quietly lying on the operation table, and without waiting anymore, he started with the implantation operation.

Kuroto’s intention of replacing Shisui’s eyes while carrying out the Implantation Operation is not just to increase the success rate of the operation, but it is also to improve the Ocular Power of the Eternal Mangekyou Sharingan with the help of the Yang Chakra present in the Hashirama Cells in an attempt to evolve the Eternal Mangekyou Sharingan into the Rinnegan.