Naruto: I'm really not an evil scientist!

"A strange feeling. Is someone watching me?"

Kanroji Mitsuri stopped humming a little tune and looked around suspiciously. Suddenly, she became nervous, and her forehead was covered with fine sweat. "Could it be the kind of pervert my husband mentioned who likes to stalk girls?"

Since she began cultivating the path of immortality, her senses have become extremely sharp, and she quickly identified several seemingly normal passersby.

"Oh, it seems the target has already become aware of it."

Uzui Tengen, a true ninja, had already realized that Kanroji Mitsuri had discovered that he was being watched, but he was not flustered at all; on the contrary, he was quite excited.

"If there's really no other way, we have to face it head-on. Whether it's a ghost or a demon, it's really not glamorous to keep cowering like this!"

The intelligence officer beside the Sound Pillar was startled upon hearing this: "Lord Sound Pillar, the Lord said..."

"Insect Pillar?! Why is she here?" Uzui Tengen suddenly exclaimed in surprise.

"What? This... is amazing." The intelligence officer followed the gaze of the sound pillar, his mouth agape, looking quite shocked.

Before anyone knew it, a woman wearing a butterfly haori (a type of traditional Chinese clothing) began to chat amicably with the target. The two quickly became close, as if they had known each other for a long time, and soon bursts of silvery laughter could be heard. Anyone who didn't know better would think they were already good friends.

Next, Insect Hashira Shinobu even turned her attention to a roadside teahouse and drank tea that had been prepared with wisteria blossoms.

"Hi, please have some~" Shinobu Kocho handed over the tea and snacks.

"Thank you, Shinobu Kocho."

Kanroji Mitsuri downed her tea, which was infused with wisteria blossoms, in one gulp. After hesitating for a moment, she asked directly, "Um, can you tell me why you're following me? Everyone on this street is an imposter, right?"

Chapter 402 The Flames of Hell

Although Mitsuri is simple and cheerful, she is not stupid. Her bright eyes are like a keen detector, and she can naturally sense the strange atmosphere that permeates the street.

The streets were nearly deserted, and those who were there seemed to be in a hurry. There was also a faint, eerie atmosphere in the air, which made her more vigilant.

The reason she was willing to chat with the girl in front of her was not only because of the pleasant feeling of rapport they had during their conversation, but also because of her keen perception.

You could sense that although the girl was full of curiosity about her and would look at her from time to time with a probing look in her eyes, there was no malice or ill intent in her gaze. It was like a clear stream, pure and transparent.

Moreover, Mitsuri is not the type of person who chooses to run away or avoid problems.

She knew very well that simply running away would only make the problem snowball.

In addition, Mitsuri is quite confident in her own abilities, after all, she has been training with Hiruko for a long time and has learned a lot of skills.

So without hesitation, she went straight to the point, intending to get to the bottom of things.

The Immortal Path, a classic text meticulously compiled by Hiruko, is all-encompassing and boasts a multitude of benefits, as numerous as the stars in the night sky.

Strengthening immunity is just one of the most basic passive skills. After cultivation, some ordinary toxins are almost like a breeze on a lake, causing no ripples and having virtually no effect on the cultivator.

As a scientific ninja, Hiruko used many scientific principles and ninjutsu knowledge when compiling the Sage Mode classics, which is why he achieved such amazing results.

Furthermore, the Sage Mode also includes a modified and upgraded medical ninjutsu called the Fine Disease Extraction Technique, which extracts toxins at the cellular level to relieve patients' ailments.

Hiruko, with the wisdom of a scientific ninja, conducted in-depth research and innovation on traditional medical ninjutsu, and thus developed this unique method.

Therefore, as long as the toxins are not too abnormal or beyond reason, Mili can use her skills to expel the toxins from her body, just like a master with profound internal strength in the martial arts world.

Mitsuri's strength already far surpassed that of ordinary people, and her body also bore the curse mark left by Hiruko.

On a certain part of her body, there is a tattoo resembling a cherry blossom. The tattoo seems to contain a mysterious power that can protect her in every way.

Moreover, Hiruko, as a scientific ninja, possesses many amazing abilities, and he can appear at any time to protect Mitsuri.

Therefore, Mitsuri was not afraid of any danger to herself, as if she had an indestructible shield.

"Phew~ Miss Kanroji really isn't a ghost after all, that puts my mind at ease."

Shinobu Kocho let out a long sigh of relief, as if a huge weight had been lifted from her heart. A sincere apologetic smile appeared on her face, like a flower blooming in spring. "I apologize for our unauthorized surveillance and probing of you. It was rude of us."

In fact, she always felt that the urban legends mentioned a pale-skinned, burrowing monster, and had nothing to do with this human girl who could walk normally in the sunlight and had a bright smile.

It is indeed wrong for members of the Demon Slayer Corps to stalk and monitor a girl who can walk normally in sunlight.

However, due to some rumors they had gathered, the team members remained skeptical and, unwilling to alert the enemy, kept delaying the process.

Many swordsmen who arrived nearby after receiving the intelligence were already quite dissatisfied, especially several Pillars. They came with the belief of slaying demons, not to be perverts who stalk others.

Therefore, when she discovered that Kanroji Mitsuri seemed to be aware of her surroundings, Kocho Shinobu decisively went to test her.

"Huh? A ghost? How rude of me! I'm not a ghost at all!"

Kanroji Mitsuri pouted, her lips puffed out like a little bun, her eyes turned into cute little bean eyes, and she waved her hands angrily as she spoke.

She followed Hiruko in her spiritual practice, and in addition to taking extra classes in various cultural and mathematical subjects, she was also taught some common knowledge about non-human races. Naturally, she learned what kind of pitiful and hateful creatures ghosts were.

"I'm so sorry, it seems Miss Kanroji knows about the existence of demons. Well, we are members of the Demon Slayer Corps, an organization that specializes in exterminating evil spirits. Recently, there have been rumors of residents in this area seeing monsters, so they contacted us. We are very sorry for mistaking you for a demon." Shinobu Kocho apologized sincerely, her eyes full of apology and sincerity.

"It's okay, we can talk it out." Kanroji Mitsuri is an optimistic and cheerful person, like the warm sun in winter, warm and generous, and not one to hold grudges over such things.

Furthermore, she had learned some things about demons and the Demon Slayer Corps from Hiruko. It might sound disrespectful, but now that she was living a very happy and fulfilling life, she still felt some pity for these demon slayers who risked their lives and gave their all.

After all, those who can give up a normal life to become demon slayers generally have tragic life experiences. At the very least, they are not normal people and all have sad pasts. Anyone randomly pulled out of the Demon Slayer Corps could be a pitiful person whose entire family was sacrificed.

"However, Miss Kanroji is no ordinary person, is she? You possess a powerful fighting spirit; could you perhaps be the successor of some secret martial arts school?" Shinobu Kocho asked curiously.

She didn't notice anything from a distance, but after getting up close, she could sense a special aura emanating from Kanroji Mitsuri.

It was as if the person in front of her was not a cute girl, but a ferocious tiger that was sleeping, ready to open its eyes at any moment, reveal its fangs, and crush any ill-intentioned person.

This world has the concept of "battle qi," but it's not the tangible battle qi of "Battle Through the Heavens" or the magical battle qi of "Western Fantasy Knight." It's not a tangible energy, but something similar to the energy exchange and sensing between martial artists in Huang Yi's fantasy martial arts novels, and it also has some resemblance to the energy of Dragon Ball.

This thing called fighting spirit is something that ordinary people, even ordinary members of the Demon Slayer Corps, don't have. Generally, only powerful demons or powerful swordsmen possess it.

Excluding these two, among normal humans who have not practiced breathing techniques, only a few powerful martial artists who have trained in dojos with real skills and experienced high-intensity battles would possess battle qi.

As a scientific ninja, Hiruko also studied the concept of fighting spirit, believing it might be related to the flow of energy within the human body and mental will.

In the setting, Akaza, the Upper Moon Three of the Twelve Demon Moons, is accustomed to fighting with his bare hands using martial arts. After becoming a demon, he constantly fought against the past Pillars of the Demon Slayer Corps, thereby cultivating an extremely powerful fighting spirit.

He can detect extremely subtle fighting spirit, and the principle behind his Blood Demon Art Destruction Killing Needle is to determine the opponent's position based on sensing their fighting spirit.

He can sense his opponent's fighting spirit like a compass, making his own attacks and evasions as precise as if he were attracted by a magnet.

When Blood Demon Art is activated, a twelve-pointed snowflake array will appear under the user's feet, which is called the spell unfolding.

The stronger the opponent's battle aura, the stronger the compass's reaction, and the higher its strength and accuracy. However, the compass cannot perceive opponents without battle aura or those who have hidden their battle aura in the world.

In the Mugen Train storyline, Akaza greatly admires powerful warriors like Rengoku Kyojuro, as this is almost a symbol of strength.

However, even after acquiring battle aura, Akaza, a martial arts expert, did not reach the supreme realm of the Transparent World, which allows him to freely conceal his battle aura. Moreover, only after reaching the Transparent World can one freely conceal their battle aura.

The highest level of martial arts in this world is actually the ability to see through the world, a realm that countless martial artists dream of. Yoriichi Tsugikuni was born at the pinnacle of countless people's dreams, and it is no exaggeration to say that he is a divine child favored by the world.

As a scientific ninja, Hiruko was also full of curiosity about the Transparent World, believing that it might involve a deep communication between the human body and the energy of the universe.

"Battle Qi? What's that?"

Kanroji Mitsuri tilted her head, blinked, and looked a little confused. She didn't understand what Shinobu Kocho was talking about. Hiruko hadn't explained this to her either, since Hiruko focused more on teaching ninjutsu and scientific knowledge.

"No, maybe I was mistaken, I'm sorry." Seeing Mitsuri's adorable and clueless appearance, and considering that Kocho Shinobu herself only had a vague understanding of the concept of fighting spirit, she didn't dwell on it any further.

In the courtyard, a black void, resembling an abyss, opened up in front of the cherry blossom tree. Hiruko, who had already begun to control the underworld, slowly walked out from it. Using scientific ninjutsu, he skillfully manipulated spatial energy, gradually transforming it from a state invisible to ordinary people into a solid entity that could be observed with the naked eye.

As a scientific ninja, he has conducted in-depth research on space ninjutsu, and this passage between the underworld and the real world is the result of his application of scientific principles and ninjutsu.

"There aren't many high-quality souls in the underworld, which is really disappointing."

Although Hiruko gained great benefits by taking control of the entire underworld, he was still somewhat dissatisfied, since human desires are never satisfied.

As a science ninja, he has always pursued higher levels of knowledge and power, and also holds great expectations for the underworld.

In this world, if a person's soul has strong attachments after death, such as being unable to let go of someone, it will linger in the human world, or exist in the gap between the human world and the underworld, which is a Schrödinger's cat-like state.

Furthermore, the underworld does not force newly deceased souls to reincarnate immediately. However, there is a certain punishment mechanism for evil people. If evil people want to be reincarnated, they must first atone for their sins in hell. This can be considered a manifestation of the Buddhist concept of hell.

As a scientific ninja, Hiruko also studied this religiously themed setting, believing it might be related to the energy state of the soul.

For example, Rui, the fifth Lower Moon, was led astray by Muzan and killed his own parents. For nearly a hundred years after his parents died, they did not reincarnate, always worried about their child.

In the original story, after he died from exhaustion, he thought he could never reach the place where his parents' souls were. While he was anxiously hovering on the edge of hell, he discovered that his parents had always been waiting for him.

Finally, exhausted and crying, she kept apologizing to her parents and returned to her original appearance.

The three children embraced and wept, and ultimately disappeared together in the flames of hell.

Souls that have not committed any sins may be reincarnated directly after their obsessions are resolved.

Therefore, most souls either linger on the outskirts of the underworld without ever entering, constantly wandering between the realms of Yin and Yang, or they are reincarnated as soon as their obsession dissipates, with the underworld serving as a stepping stone. Most souls do not stay in the underworld for long.

Souls that can linger in the underworld for a long time are basically scum, only fit to be used as firewood by Hiruko. There is no SSR like Yoriichi Tsugikuni that Hiruko longs for.

Yoriichi Tsugikuni himself may have already been reincarnated, and if he has been reincarnated many times, then he would no longer be called Yoriichi Tsugikuni, but a completely different life form, which would be of no value to Hiruko.

After all, the underworld in this world is like a pre-set mechanism, where souls can be reincarnated if the conditions are met, unlike the Pure Land of the Ninja World, which only allows souls to enter but not leave, causing them to accumulate and slumber there. Moreover, with the existence of the Impure World Reincarnation, even the dead may not find peace.

Of course, Hiruko had tested it. In this world, the Impure World Reincarnation technique could still be used with slight modifications. He improved the Impure World Reincarnation technique using scientific ninjutsu. However, the dead people resurrected by Impure World Reincarnation did not have the infinite energy and infinite chakra bug that existed in the ninja world. Instead, they would constantly consume the caster's chakra.

However, the immortality of those resurrected through the Impure World Reincarnation technique still exists, but each time the body of the deceased is broken up and then reformed, it requires more chakra to recover.

However, even if you find the deceased's DNA, you cannot use the Impure World Reincarnation technique to summon a soul that has already been reincarnated and is welcoming a new life.

Once a soul has been reincarnated, the Impure World Reincarnation technique cannot summon it from its living body to the offering.

Even if a soul that has already been reincarnated dies again and becomes a soul again, and happens to not be reincarnated during this period, you cannot use its DNA from its previous life to resurrect it in the filthy world, unless you dig up its DNA from this life.

Forget about reincarnating countless scientists, saints, swordsmen, grandmasters, artists, and the like into your own errands; at most, you can reincarnate and summon some souls that still cling to their obsessions, hovering between the realms of Yin and Yang.

Furthermore, without the bugs of the ninja world, using the Impure World Reincarnation in this world isn't that cost-effective. If there's a real need, it's better to just use Yin-Yang Release to revive directly.

As a scientific ninja, Hiruko also studied Yin-Yang Release, believing that it might contain the most fundamental energy laws of the universe.

"Well, if not, so be it. Anyway, I can create beings with the strength of Yoriichi Tsugikuni artificially. I can even easily create a bunch of beings stronger than Yoriichi Tsugikuni. Besides being a material for spellcasting, the multi-functional White Zetsu is also the best warrior." Hiru sighed and comforted himself.

Chapter 403 Thank you! My dear husband!

He valued Yoriichi Tsugikuni purely out of a collecting mentality, like collecting precious scientific samples, rather than because he valued the opponent's combat power or so-called qualifications.

"Although this natural underworld has rigid rules, it has helped me far more than the Pure Land of the Ninja World. Cause and effect, karma, reincarnation... but why are most of them Buddhist-related laws and concepts, and why are the things I understand so insidious?" Hiruko looked up at the sky speechlessly. He clearly wanted to become a patriarch of an immortal sect, but unexpectedly he went further and further down the path of evil gods and demonic Buddhas.

The moment he took control of the underworld, he inexplicably understood many things, as if he had been enlightened by the entire underworld, and comprehended a large number of conceptual things.

As a scientific ninja, he also rationally analyzed this sudden acquisition of knowledge, believing that it might be a resonance between the underworld and his scientific knowledge.

Or rather, after he mastered and imitated the authority of the underworld, his soul was further sublimated under the blessing and catalysis of the fragments of the main god, giving rise to many supernatural abilities that seemed like instincts.