Naruto: I'm really not an evil scientist!

Unexpectedly, after arriving in the underworld, his outstanding medical skills and profound knowledge of demons earned him the appreciation of Hiruko, who took him under his wing and made him a physician in the underworld.

After all, Tamayo is the doctor in this world who has studied demons the most. Although his medical skills are far inferior to Hiruko's overall, the two have different perspectives on things, and Tamayo can provide him with some inspiration.

"No, it's nothing."

Hiruko snapped out of her reverie, a playful smile playing on her lips. "By the way, Tamayo, do you think Muzan would be a good mother if he got pregnant?"

The female version of Muzan is quite good; the plot of how Muzan suffers at the hands of Muzan is very interesting.

However, Hiruko doesn't really like group sex and doesn't have the desire to personally enjoy herself, so it would be better to just get Muzan pregnant.

He recently improved the skill of blessing childbirth, so Muzan can try it out.

How about we have ten babies in one birth this time, so that Muzan can enjoy ten times the treatment of the ultimate life form Kars?

"Huh?" Tamayo tilted her head, looking a little confused, her mind blank. "What did you just say, Lord Hiruko? I didn't hear you clearly. Could you repeat it?"

……

"What kind of effect would my improved and upgraded power of blessing children have if used specifically on ghosts who have lost their physical bodies? I really look forward to it."

Hiruko murmured, his eyes gleaming with the fanatical light characteristic of a research ninja. He snapped his fingers, lowering Muzan Kibutsuji from the tree.

"What...what do you want to do?" Muzan Kibutsuji took a few steps back in fear, like a helpless child.

The man before me is definitely not a compassionate god or Buddha; he is a terrifying demon, a devil who manipulates people's hearts, a monster in human skin!

"When you were a ghost, you could freely change your body. You've experienced being a man, a woman, and a child, but I suppose you've never experienced what it's like to be pregnant."

"I want...to let you experience the greatness of maternal love." Hiruko revealed a sunny smile, and then walked towards Muzan.

One step, two steps, like the steps of a demon, directly shattered Muzan's sensitive and fragile nerves: "Don't come any closer—!!!"

Seeing Muzan's terrified expression, Hiruko shrugged: "Alright, since you're so scared, then I won't go."

He clapped his hands, looked at Muzan with a compassionate expression, and his chakra surged, forming a huge golden Buddha phantom behind him. The Buddha's light shone brightly, illuminating the three realms and six paths, as if the Buddha himself had come.

Enabling the Buddha effect wasn't difficult for Hiruko; the Thousand Hands Welcoming Kill technique, a secret technique from the Fire Temple in the Ninja World, could be made quite intimidating with a few modifications.

The story of the thousand-year-old centipede demon Cihang Pudu in A Chinese Ghost Story taught Beiluhu a lesson: one's image is very important when walking among humans.

No matter what your true nature is, as long as you present yourself in a glamorous and upright manner, and your actions are always grand, righteous, and dazzling, then you will be seen as a righteous and accomplished person by most people.

Hiruko also firmly believes that he will become a righteous master in the future. Now that his foundation is mixed, he can take the route of a Buddhist big shot to transition a little when packaging himself.

Habits are formed over time, so even a casual activation of a blessing skill for having a child must appear sacred and solemn.

After all, people often talk about Guanyin, the Goddess of Mercy, who grants children, so this fits the folk legend.

"Submit completely before me, and I will bless you and grant you a completely new experience of being a ghost."

Hiruko clasped his hands together, and a magnificent golden lotus bloomed around him.

Meanwhile, under the influence of an unknown force, Muzan Kibutsuji's soul form transformed into a woman wearing a kimono, and his originally flat stomach instantly turned into a giant watermelon belly.

"Ah—!" Muzan Kibutsuji first touched his stomach in disbelief, and then a piercing pain surged into his heart.

Pfft!

Tiny arms ripped open Muzan's stomach, and many strange, black-red infants struggled to crawl out of his womb.

As the babies cried, a chilling wind arose, stirring up the malevolent energy of the underworld.

"Interesting. Souls can actually get pregnant, and these fetuses can absorb Muzan's enormous evil power to quickly take shape, and are born with supernatural abilities."

Hiruko was somewhat surprised and found it quite amusing. He was mentally prepared to torment Muzan's soul, and was even ready to restore Muzan's physical body if necessary, and then bless him with another pregnancy.

Unexpectedly, Muzan was so resilient; even after giving birth, his soul didn't weaken much.

Hiruko thought that giving birth to so many ghost infants at once would surely have severely damaged his vitality. However, Muzan's soul, despite its pain, did not collapse and die directly. In fact, it transferred some of the enormous karmic energy generated by the curse.

The ghost infants born from these babies all possess considerable supernatural powers. At first glance, they seem to be able to manipulate resentment, transforming between reality and illusion, creating illusions, launching attacks on the soul level, and even cursing others.

As Muzan struggled to give birth to the demon infants one by one, he couldn't control himself. His face turned slightly pink, and he opened his mouth, stuck out his tongue, and rolled his eyes, revealing a humiliated ahoge expression. Hiruko walked over and smiled slightly: "From today onwards, you are the Nine Demon Mothers of my Underworld."

Although she gave birth to ten children, isn't it normal to have ten children out of nine?

Buddhist scriptures say that there was a demoness Rakshasa who gave birth to five hundred children, known as the "Nine-Child Demon Mother." She craved the flesh and blood of human infants. The Buddha used his supernatural powers to take away one of her children. The demoness Rakshasa cried out to heaven and earth, wailing and beating her heart in agony, as if she had gone mad. Finally, she saw the Buddha radiating light, appearing as a compassionate father, holding the demoness Rakshasa's child in his arms. She knelt down and begged for the child to be returned. The Buddha, through this karmic connection, converted the demoness and attained the righteous path.

Muzan, that scum, will naturally not achieve the righteous path, but he can become a breeding sow, producing some interesting research materials for Hiruko, or even being refined into special magical artifacts.

Through his experiments on Muzan, Hiruko discovered that even a soul could give birth to a fetus. The blessing and childbirth technique he developed has a wide range of applications, and we should not let the "common sense" of our mortal days limit our thinking.

If even the soul can conceive, then what in the universe cannot conceive?

Can flowers, trees, rocks, and even some things that exist in the concept of nature also give birth to a spiritual embryo through prayer and blessing?

If we bless a planet with abundant energy, could it give birth to a Titan with a star soul?

In Journey to the West, people like Sun Wukong, who are born and nurtured by nature, are called natural saints. Hiruko thought that he might be able to artificially create some natural saints.

In theory, his seemingly outlandish ideas were feasible, but in practice, Hiruko found that some succeeded while others failed. This was due to a variety of problems, including insufficient technical capabilities and the inability to meet certain essential requirements.

"Ha~ I was too impatient. It seems there is still a lot of room for improvement in my prayer and blessing techniques."

Hiruko showed no sign of annoyance, chuckled lightly, and appeared quite relaxed, because his thinking was correct.

Hiruko was surrounded by "spirits": flower fairies born from flowers, ghost children born from various sinful souls, and elemental life forms whose bodies flowed with lava... Clearly, Hiruko's experiments added a lot of life to the underworld, and Muzan was not the only one who was forced to give birth to offspring by Hiruko's cruel hands.

Take souls for example. A large number of sinful souls who were demons in their previous lives suffered Muzan's treatment and gave birth to some demon babies who were born with supernatural abilities.

For example, the baby born to Douma, in addition to some vengeful spirit abilities, also showed a mastery of ice and poison-based supernatural abilities, which is related to Douma's Blood Demon Art during his lifetime.

After being tested, those ghost babies with a certain level of spirituality will be raised in the underworld as Ghost-type Pokémon by Hiruko, waiting to be adopted by underworld officials or destined people who come through his dimensional shop and form contracts with him.

There are also many ghost infants who, like insects and beasts, possess only the instinct to devour and have no intelligence whatsoever.

Chapter 415

Hiruko was used directly as a consumable item, just like White Zetsu, as a test subject or a casting material.

……

Time flies, and more than half a year has passed in the blink of an eye.

After Tsugikuni Yoriichi's death, he reported to Hiruko and saw Hiruko's formidable power. He realized that he had the potential to surpass Tsugikuni Yoriichi, so he immediately swore allegiance.

After gaining a new body and the power of chakra, he had Hiruko inscribe a cursed seal that would give him even more power. His body was covered in tattoos, and he had become the gatekeeper of the underworld.

Kyojuro Rengoku and several other Pillars became honorable civil servants of the Underworld after their deaths, accumulating contribution points in hopes that their loved ones could be reincarnated into a better family in the future.

The Demon Slayer Corps had long since disbanded, and all the swordsmen returned to normal life, changing careers with the help of the Ubuyashiki family and busying themselves with the trivialities of daily life.

The Ubuyashiki family also officially transformed into a family of priests who dedicated themselves to the gods of the underworld.

Meanwhile, Shinobu Kocho, Kanao Tsuyuri, Aoi Kanzaki, and other girls from the Butterfly Mansion have already adapted to daily life in the Underworld.

Under the cherry blossom tree, girls were gathered together resting and eating some snacks.

"Sigh, I wonder when Lord Hiruko's interest will end," Kanae Kocho said with some distress. "Even Tamayo-san... always feels that we might get pregnant at any time while we're with Lord Hiruko."

For the past six months, Hiruko has been constantly experimenting with and improving his blessing and childbirth skills, leaving no stone unturned, whether it be human, ghost, carbon-based, silicon-based, material existence, or even conceptual metaphysics.

Moreover, he made no attempt to conceal his actions, leading to a surge in the population of the underworld.

Kanae doesn't object to having a child with her beloved, but she really doesn't want to experience the kind of thing where Hiruko just glances at you casually and you instantly get pregnant and give birth, especially after seeing Muzan's depraved and terrifying appearance.

"Oh dear~ Is my sister scared?" Shinobu playfully touched her sister's belly, then said seriously, "Don't worry, sister, Lord Hiruko is very considerate of his own people."

Miss Tamayo gave birth at her own request.

Tamayo was also a pitiful person, because she was targeted by Muzan due to her excellent medical skills.

When she was still human, she contracted an incurable disease that was beyond the reach of medicine at the time. Because she wanted to see her child grow up, she tried every means to find a cure in order to continue living, but ultimately she was unsuccessful.

Just when she was in dire straits, Muzan Kibutsuji appeared.

Muzan claimed that as long as one becomes a demon, one can live forever and that terminal illnesses can be easily cured.

Tempted by this, Tamayo eventually accepted Muzan's blood and became a demon.

However, at the time, Tamayo did not know that demons needed to eat people, and the psychologically twisted and depraved boss Muzan deliberately did not tell Tamayo this.

After expending a great deal of energy to become a demon, Tamayo entered an uncontrollable berserk state, ultimately killing or even devouring her children, husband, and other family members in a state of irrationality.

Therefore, Tamayo herself had a deep obsession with children. She begged Hiruko to let her have another child, as she wanted to witness her child's growth firsthand.

Hiruko granted Tamayo's request and allowed the child to be born in its purest form. He supplied the fetus with the necessary nutrients using his own chakra, abandoning all evil and resentment, so that Tamayo could successfully give birth to a pure spirit child in her ghostly form.

"Eh, did Ms. Tamayo ask for it herself? Shinobu, how did you know?" Kanae Kocho tilted her head, looking very cute.

“I happened to be there at the time.”

After explaining, Shinobu Kocho frowned and asked, "Speaking of which, Lord Hiruko recently intended to restore those demons to their physical bodies. Do you know what exactly happened?"

"I heard that Lord Hiruko is going to start a trial, a survival trial similar to Fujikasayama, to hone some outstanding children. These demons are just tools for the trial to temporarily restore their physical bodies."

Kanae Butterfly showed a compassionate expression, "These demons are so pitiful. They are already dead, yet they have to be killed again."

Kanae genuinely felt sorry for these ghosts, who had to keep giving birth to ghost babies and also serve as tools for trials and tests.

Because, as tools of the trial, they only have the right to be killed. Under Lord Hiruko's watchful eye, there is no possibility of them overstepping their bounds and killing. They may even suffer more punishment afterward for injuring others during the assessment.

As a ruthless and efficient scientific ninja, Hiruko had already decided the fate of these demons, and his research always presented its results in the most direct and cruel way.

“So that’s how it is…” Shinobu Kocho seemed to understand something, a sharp glint in her eyes. “Then, do we also have another chance to kill that scoundrel Doma?”

Compared to her overly gentle older sister Kanae, Shinobu Kocho is more vengeful and more emotional.

"You also want to join this trial?"

Hiruko was initially surprised. This research ninja was always used to being in control of everything, and he needed time to process Shinobu Kocho's sudden request. Then he quickly figured out the reason: "You want to kill Doma with your own hands?"

"Yes, I hope you will agree." Shinobu Kocho bowed very directly, her voice filled with unwavering determination.

“It’s not impossible, but Doma is only temporarily resurrected as a tool for the trial. Afterwards, his soul will fall into hell again to be tortured. What’s the point of doing this?”

Hiruko shook his head, his eyes revealing a scrutiny of Shinobu Kocho's motives. "Besides, you should already know that Doma is a heartless guy. He has no emotional fluctuations, no normal human joys and sorrows, and he can't understand so-called love and hate."

Even the continuous production of ghost babies could not disturb his mind.

On the contrary, tolerating your revenge might make him feel like it's a fun game.

“This…” Shinobu Kocho was stunned. She had never imagined that revenge would be so complicated, or even meaningless.

"In my opinion, any revenge that cannot make the enemy feel pain and even doubt their own existence is meaningless."