Becoming a Part of History Recognized by the Soul King
The Shisuna Family was located in a relatively remote part of the Seireitei. The mansion was built a long time ago and was somewhat dilapidated, making it incomparable to the large mansion that the Nangong Family bought after Zero moved in.
Just like the world Zero lived in, the Soul Society has incredibly high housing prices, but this isn't a bubble economy; it's a real, tangible one.
Many Soul Reapers work hard for hundreds of years before they can barely save enough money to buy a few small plots of private land in Seireitei to build their own homes.
Seigen's family belonged to the middle-class nobility, but they declined later. However, they still had a house to live in. Many properties and lands of declining nobles were confiscated and then redistributed for sale, so they weren't worried about finding buyers.
"It's been so long since we've had any guests!"
Seigen sighed slightly. Originally, some people would come to visit him, the Captain, but that stopped after his sister fell ill.
He understood everyone's situation; there was no cure in Soul Society, and everyone was afraid of getting infected and dying from the disease. Even the Great Nobles couldn't avoid it.
"So, you didn't invite anyone else, did you? I think I only came here once, more than ten years ago, when you and your brother celebrated your birthdays!"
Zero knew that the two were twins, and they looked very alike, but Seigen's expression was fierce when he was normal, while Ika's face was gentle.
"Even without an invitation, quite a few people come to visit on their own initiative. As for their purpose..."
Upon entering the villa, Seigen glanced at Ling beside him, the meaning of which was self-evident.
What kind of look is that? I never intended to hit on your sister.
Ling noticed Seigen's gaze and intended to dissuade him from his stubbornness, but Seigen was displeased upon hearing this. "What do you mean? Are you saying my sister isn't good enough for you...?"
"Wait, take a bath? You're already thinking of taking a bath with her before we've even started? I advise you not to do it, or I'll kill you."
Seigen, who was initially just a little annoyed, caught the keyword and was about to grab Ling by the collar, but Ling dodged it.
"You bastard, your thoughts are truly filthy..."
Zero intended to occupy the moral high ground and use his words to sober him up, but a few dry coughs came from not far away, causing Seigen to run over quickly.
"Ika, don't worry, don't worry, drink some water first, I'll brew some medicine for you right away..."
Seigen had no heart to argue with Ling anymore, and was diligently serving Ika who was lying on the mat... Ling could see that even as a Captain who had seen life and death many times, he was afraid of losing his only loved one.
"Nangong, Captain? Ahem, excuse me..."
"Don't get up, you should stay in bed! I hate formalities, just keep respect in your heart."
When Seigen went to the side to brew medicine, Ling quickly stopped Ika from getting up. He didn't have a habit of forcing patients to greet him, especially not a cute girl like her.
"It's rare that you have time to visit my home. Are you here to have a drink with your brother? Cough cough... cough cough cough..."
"I came here specifically to visit you. I heard your illness has relapsed, and I'm thinking about how to treat it."
"Hehe, thank you so much! But Captain Unohana, cough, everyone said it's impossible to do this, cough cough cough..."
"How will you know if you don't try? Okay, stop talking, I'm going to go brew your brother's medicine!"
Ika suppressed her cough as she spoke, only letting out a soft cough when she was about to burst, until she finished speaking and then coughed more violently.
Zero dared not talk to her anymore, fearing it would worsen her condition and cause Seigen to lose his sister on the spot, then pull out a knife and kill himself.
Ika was originally quite energetic and had a good temperament, but unfortunately, she was tormented by illness and became unrecognizable... She lost a lot of weight, had obvious dark circles under her eyes, and her Reiatsu, which was at the Vice-Captain level, dropped to an extremely low level.
Seeing her haggard appearance, Zero suddenly realized: even Captain-level who could easily live for hundreds or thousands of years could die from such an unexpected accident.
Zero suddenly recalled the scene he had witnessed when he wandered through the Soul Society: many Pluses were collectively infected with an unknown disease, causing many Pluses who could survive on water alone to choose to commit suicide and be reincarnated into the World of the Living.
After much deliberation, Zero decided to help the girl. If he researched and developed the Kidō according to his own ideas, he might actually succeed... At least Zero, after his research, could already use 'Ittō Kasō' without taking damage...
In fact, there has always been a department in Soul Society called the 'Seireitei Research Institute', but unfortunately, it only studies the immortality of souls and does not study how to cure diseases at all.
It doesn't matter. Since they're not going to research it, Zero plans to go and borrow some materials, and then research and develop some useful Kidō to cure the diseased rogue Pluses in Soul Society.
When the director of the research institute heard that Kenpachi wanted to borrow the materials, he naturally dared not refuse. As long as it was not about research on the immortality of the soul, he agreed to let Zero see it.
Zero merely borrowed a large amount of knowledge about the composition of souls, as well as information about souls contracting diseases and dying.
Zero knows that the soul is made up of Reishi, and he also knows why missing body organs cannot be transplanted.
For example, a blind soul cannot see even if it receives eyes transplanted from another soul, because the Reishi structures of the souls are different and cannot be integrated.
The root cause of death from disease is that in 99% of cases, the soul is infected with some kind of Reishi bacteria, which causes Reishi disease within the soul, eventually leading to its own collapse and death.
Most of these infections come from unsanitary food, but a small number enter the Pluses's body through respiration or wounds. Because they are so small, they cannot be detected by the naked eye.
Zero constantly learns various kinds of knowledge, and when he needs to put it into practice, he goes to Hueco Mundo, where there are ready-made Laboratories.
Eight years passed in the blink of an eye, and it was now 171 years before Aizen was sealed away.
The Las Noches's Laboratory is divided into two departments: one is a studio for human scientists, and the other is a studio for scientists who voluntarily transform into Hues. It's a chaotic mess inside.
For a long time, scientific research had been stuck in a bottleneck, until one conference when a research director slammed his fist on the table and roared, "If we want to study the virtual, we must first transform ourselves into the virtual, so that we can experience their feelings."
Thus, the dozen or so staff members who were already obsessed with the research and to the point of madness immediately wanted to use unconventional means to corrupt their souls into nothingness.
Using the power of a sub-level Menos Grande, one can shield past memories, inject a false memory, cause oneself to have obsessions in the World of the Living and fall into Hollow form, and then regain past memories.
After the first success, others who followed suit also succeeded but ultimately failed, until a group of Ragged Hollows who regained their memories and only cared about scientific research results appeared, and only then did this scene come to be...
At this time, Zero also joined the research team. He treated a Rukongai man lying Rukongai the operating table who was seeking death. Scientists had deliberately put Reishi bacteria into his body, allowing Reishi bacteria to ferment and mimic patients in Soul Society, so that Zero could try to save him using various Kidō.
This is already the eightieth Experimental Subject, and Zero has obtained quite comprehensive data.
A red bubble appeared in Zero's palm. This was the Kidō for healing, which Zero had been researching for eight years and had finally stabilized... Of course, he didn't study this every day; he spent most of his time researching Hadō.
He slowly pressed it into the Experimental Subject's lungs, waited a few seconds, and then slightly increased the output of Reiryoku so that the red bubble could expel something without collapsing.
When Zero extracted the red bubble, there were indeed some extra things inside. If you looked at it under a microscope, you could see bacteria that were even Little Ichi than Reishi...
This is Zero's treatment method: forcibly extracting Reishi bacteria from the soul's body using the Kidō, without excessively harming the patient... This level of meticulousness is even greater than that of the Kaido, because it is too difficult to control.
"It worked!"
Zero merely smiled slightly at this near-epoch-making success; he felt joy, but it paled in comparison to the intense feeling of his Reiatsu rising to 8.4.
After several more extractions, Zero's vacation came to an end. He quickly returned to Soul Society to treat the first patient he had treated with this Kidō...
"Nangong, why can't I see the treatment?"
"You're asking me to take my clothes off? How can you be so shameless?"
"You dare to take advantage of my sister? How dare you?"
"I'm a doctor, why shouldn't I be embarrassed?"
Seigen argued with Zero again, but this time he lowered his voice so that only the two of them could hear him. However, in the end he gave in and handed his sister over to 'Kenpachi', whom he remembered as someone who only knew how to fight.
Please!
"Don't bother asking, I'm 90% confident this time."
Seigen bent over at a ninety-degree angle, waved his hand, turned and went into the house, but Seigen didn't get up for a long time...
A month later, Yama-jii summoned Zero. On his desk was a note from the Soul King Palace.