'What is a bionic eye?'
Kakashi didn't know, nor had he ever heard of such a thing.
But one thing Kakashi was very clear about was that this so-called bionic eye in Mirai's hand had nothing to do with an eyeball at all.
At least, it had nothing to do with an eyeball in the human body.
It was clearly a mechanical component, like a part of a machine.
He was a human, not a machine. He didn't have batteries or circuits in his body. If he were to install this so-called bionic eye, wouldn't he become part-human, part-machine?
"Don't worry, Kakashi, the bionic eye is very safe. You don't need to have any concerns at all."
As if seeing through Kakashi's worries, Mirai explained calmly.
"Bionic eye is only an abbreviated name. The full name should be 'Bionic Prosthetic Eye.' It can perfectly mimic all the characteristics of a normal eyeball, and once transplanted, there will be no visible difference in appearance."
Mirai paused slightly.
"In addition, bionic eyes also possess many abilities that ordinary eyeballs do not, such as dynamic vision, motion capture, environmental scanning, thermal imaging, and a series of other technological capabilities."
"After successfully transplanting a bionic eye, you will also possess these abilities."
Kakashi felt dizzy after hearing Mirai list so many abilities in one breath.
He understood dynamic vision; the Sharingan possessed super dynamic vision and copying abilities. But what exactly were environmental scanning and thermal imaging?
These unheard-of terms successfully piqued Kakashi's curiosity.
"Mirai-sama, there won't really be any risks in transplanting a bionic eye, will there?"
Kakashi asked cautiously.
The thought of inserting a mechanical product into his eye socket still made him feel uneasy.
What if it suddenly exploded? Wouldn't his brain be blown apart?
"Don't worry. The bionic eye is very safe and poses no safety hazards. It's even safer than transplanting a Sharingan, and most importantly..."
Mirai looked at Kakashi meaningfully.
"There's no risk of impotence –"
"Okay! Transplant! I want the transplant! No need to talk about it anymore!"
Kakashi had already suffered enough from the feeling of his body being hollowed out by the Sharingan.
Just this one advantage alone made the other concerns about transplanting a bionic eye completely insignificant.
"Very well. Then the transplant will begin shortly."
"Oh, and the bionic eye doesn't have an internal battery. You only need to inject a small amount of chakra, and it can power the bionic eye for several years. The bionic eye connects directly to your optic nerve, so you can use it just like a normal eyeball."
Lying on the operating table, Kakashi listened to Mirai's explanation and couldn't help feeling a sense of anticipation for the bionic eye transplant.
"Also, after you've transplanted the bionic eye, I will provide you with a weapon that pairs with it."
"A weapon?"
"You'll understand once the transplant is complete."
The bionic eye transplant began.
Lying on the operating table, Kakashi, filled with nervousness, allowed Mirai to manipulate his body.
He didn't dare move at all, fearing that even the slightest movement might affect the transplant.
Several minutes later.
"Done."
"That fast?"
Kakashi was shocked. He wasn't even mentally prepared yet, and it was already over.
Mirai rolled his eyes at him.
"If someone else performed the transplant, it might take quite a while. I'm different."
Using the precise control of Electromagnetic Force, the nerve connections during the transplant process could be completed effortlessly.
It didn't require much effort at all.
Sitting up from the operating table, Kakashi reached out with a finger and touched his left eyeball. He felt a hard object and immediately realized it was now his eye.
Zzzzt!
The stinging sensation of electric current passing through made Kakashi instinctively wince.
"Don't worry. This is a phenomenon that only occurs when the bionic eye is first activated. It won't happen again."
The world in his left eye suddenly became clear, and a vibrant, colourful world unfolded before him.
Kakashi tentatively rotated the bionic eye within his eye socket, and just like a normal eyeball, there was no stiffness or delay.
A deep sense of pleasant surprise surged in his heart.
"The bionic eye… it's really no different from a normal eye."
"Try activating the bionic eye's other abilities."
'Other abilities?'
Kakashi cautiously began testing the bionic eye, and sure enough, options to switch abilities appeared in his mind.
The scene in his vision suddenly changed. The outlines of objects turned blue or green, while Mirai's body appeared bright red.
"It seems to be the thermal imaging function. Let's try something else."
Kakashi continued switching modes, and then something like a sound wave spread out from the bionic eye.
Suddenly, a precise three-dimensional image appeared clearly in his mind.
"This is?!"
Kakashi's heart began pounding violently.
This ability was almost identical to the Byakugan.
With this transplanted bionic eye, he was practically like someone who had obtained a special kekkei genkai.
"The bionic eye has many other abilities. Learn about them slowly and you will be pleasantly surprised to possess these eyes."
Mirai said with a faint smile.
Kakashi held his breath and carefully chose his words before asking.
"Mirai-sama, can these bionic eyes be mass-produced? If every ninja in Konoha could be equipped with such bionic eyes, wouldn't everyone possess a Dojutsu-grade kekkei genkai?"
Just imagining such a scene made Kakashi's heart pound uncontrollably.
The brief experiment just now had already given him a rough understanding of the bionic eye's abilities.
It was practically a combination of the Byakugan and the Sharingan.
And it had no side effects.
Once mass-produced, wouldn't every ninja in Konoha's army possess a Dojutsu?
"Not yet."
Mirai shook his head.
"The manufacturing difficulty of the bionic eye is extremely high. Your bionic eye is the highest-grade model, which is why it possesses so many functions."
"For an eye like this, it would be unrealistic to popularize it within a short period of time."
The excitement in Kakashi's heart dimmed slightly.
But 'not yet' meant 'possibly in the future', didn't it?
Kakashi keenly grasped the hidden meaning in Mirai's words.
Mirai then brought over a tray, on which two items lay quietly.
One of them was a short ninja blade.
Kakashi's pupils trembled slightly.
The appearance of this short ninja blade was extremely similar to his White Fang Short Blade.
The White Fang Short Blade had been a memento left by his father before committing suicide.
Unfortunately, it had been destroyed during the Third Great Ninja War.
"This is..."
"This is the weapon I mentioned earlier that pairs with the bionic eye."
A short ninja blade resembling the White Fang.
And the other item was… a belt?
Kakashi looked puzzled.
These two items didn't seem like they had anything to do with a bionic eye.
"Just pick them up and try them."
Hearing Mirai's encouragement, Kakashi picked up the short ninja blade.
It felt cool to the touch. Compared to the White Fang left by his father, it was slightly heavier.
"There's a switch on the tsuba. Try flicking it."
Following Mirai's reminder, Kakashi indeed found a switch on the tsuba.
He flicked it with his finger.
Instantly, his expression changed drastically.
Vroom!
The ninja blade was vibrating.
The vibration amplitude was extremely small, so small that the naked eye couldn't even detect it.
However, Kakashi, holding the hilt, could clearly feel the blade vibrating.
More precisely, the blade was vibrating at an extremely high frequency.
Kakashi tentatively drew the blade across the tray.
There was no resistance at all.
Just like a heated knife slicing through butter, the blade easily cut a gash through the several-millimeter-thick metal tray.
"It's quite the ninja blade!"
This was definitely a top-tier weapon.
Moreover, it had clearly been designed using the White Fang as a template, perfectly matching his habits.
It felt extremely natural in his hands.
"Now let's look at the other one."
Kakashi picked up the remaining belt.
The material of the belt felt very special and comfortable to the touch.
In the center of the belt was a circular button.
Kakashi pressed the button.
Instantly, a viscous silver liquid flowed out from the belt and spread along Kakashi's fingers, rapidly covering his body and forming a thin layer of armour.
"This is waist armour created using nanotechnology."
"You only need to press the button to activate it. It has multiple functions such as invisibility, protection, and amplification."
'Nanotechnology?'
Kakashi looked down at the thin armour covering his body, his expression complicated.
"Bionic prosthetic eye, high-frequency vibrating short ninja blade, nano waist armour."
"With these three technological weapons, you should be the strongest among Konoha's tech-type ninjas."
Mirai looked at the Kakashi he had created with clear satisfaction.
Tech-type ninjas were a new type of ninja born within Konoha.
They possessed the ability to combine technology with ninjutsu.
The Hyuga clan wielding electromagnetic sniper rifles and the Uchiha clan equipped with technological ninja blades were both considered tech-type ninjas.
However, if one were to determine the strongest among them, there was no doubt that Kakashi now stood at the top.
Whether it was the bionic eye, the high-frequency vibrating ninja blade, or the nano waist armour, they were all top-tier technological weapons.
With all three combined, Kakashi already possessed Kage-level combat power.
"Get used to the gifts I have bestowed upon you."
"One day, I will need you to use the weapons I have given you to do something for me."
Mirai turned and left.
His voice echoed in Kakashi's ears for a long time.
Outside Konoha Village, in the forest behind the mountain.
Kakashi held the short blade in his hand. His left bionic eye instantly activated, and the vision before him suddenly changed.
The world in his sight seemed to slow down.
Every tree appeared like a target waiting to be cut.
Kakashi pressed the button on his waist, and the nanofluid spread out to cover his body.
Whoosh!
His body instantly disappeared, flickering through the forest like a phantom.
The short ninja blade in his hand unleashed terrifying cutting power, effortlessly slicing through tree trunks as if they were butter.
When Kakashi finally stopped, the patch of forest behind him suddenly creaked loudly.
Dozens of trees collapsed almost simultaneously, raising clouds of dust and creating a spectacular scene.
Kakashi turned around and looked at his own handiwork.
Powerful.
That was the only word in his mind right now.
Compared to when he had the Sharingan, he was now far stronger than before.
Even against Kage-level ninja, excluding monsters like Mirai who couldn't be judged by common sense, he was confident he could fight.
However, there wasn't much joy in his heart.
Any gift given by fate comes with a price already marked in the dark.
Mirai's final words replayed in his mind.
These technological weapons had not been given to him for free.
One day, he would have to do something for Mirai.
But what that thing would be… he still did not know.
*****
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✓ Killed For 100 Years in Hueco Mundo, Aizen Invited Me To Soul Society!
✓ Naruto: Senmei Asahi
✓ Naruto: Uchiha's Intelligence Dealer
✓ Naruto: The Fifth Hokage Is Naruto's Uncle
✓ Naruto: Who Made Him a Ninja?
✓ Bleach: In My Second Reincarnation, I Became The Ninth Kenpachi
✓ To Love-Ru: Spoiler Route [R-18]
✓ Naruto: The Accidental Incubus [R-18]