Hidden Leaf Hospital.
A group of people surrounded Yakumo Kurama, who was lying on a hospital bed. At the center stood Tsunade, the legendary figure who had established Hidden Leaf's medical system. Around her were various medical shinobi who had come after hearing the news, including Uchiha Shinji and his medical ninjutsu instructor, Kusana Kaoru.
Tsunade personally examined Yakumo's body, then took the medical report handed to her by Shizune, furrowing her brow. "This is impossible!"
Shizune quickly asked, "Lady Tsunade, have you found the cause?"
All the medical shinobi in the room turned their attention to Tsunade, eagerly awaiting her explanation.
Before Tsunade arrived, they had all examined Yakumo's body and were completely baffled by the sudden recovery of her previously deteriorating physical condition. After all, the Kurama clan had brought Yakumo to the hospital countless times for treatment.
Almost every medical shinobi present, except for Shinji, who was still in the learning phase, had attempted to treat Yakumo in various ways. However, Yakumo's physical weakness was closer to a congenital disability, so none of their treatments had yielded any significant results.
This was precisely why everyone was particularly intrigued by Yakumo's inexplicable recovery.
However, Tsunade, under the eager gazes of everyone, shook her head. "For now, I can't pinpoint the exact cause."
"What!?"
"Even Lady Tsunade can't find the cause?"
"This is truly strange!"
The medical shinobi began murmuring among themselves.
In their eyes, Tsunade was the absolute authority in the medical field. If even she couldn't solve the problem, it meant the issue was far from simple.
Lying on the bed, Yakumo, who had initially been nervous and uneasy, gradually relaxed. She thought to herself, "The organization's methods can even evade Lady Tsunade's detection?"
The fact that they could deceive Tsunade undoubtedly proved the Akatsuki's superiority, further strengthening Yakumo's confidence in their ability to cure her.
Meanwhile, in the crowd, Shinji wore an expression of humble learning, listening intently to the discussions and debates among the medical shinobi.
He had found an excuse to be here to ensure that Tsunade wouldn't discover anything.
In terms of medical ninjutsu, he was indeed far inferior to Tsunade. However, he had completed the basic medical ninjutsu curriculum and understood its principles. As long as he used 'Wazunagi' to extract all the remaining Yang Release chakra from Yakumo's body before Tsunade's examination, then theoretically, even Tsunade's unparalleled medical skills shouldn't be able to detect anything.
At this moment, Tsunade turned to Yakumo on the bed and said, "Tomorrow, I'll arrange a comprehensive examination for you. I hope we can find the reason for the changes in your body."
Following Shinji's instructions, Yakumo asked, "Even you don't know what's happening to my body?"
"In the face of life's mysteries, I am but a beginner," Tsunade smiled, then added, "But you don't need to worry too much. Based on the current medical data, your body is moving in a positive direction. We just can't identify the cause of this phenomenon yet."
Yakumo nodded. "Thank you for your hard work."
Tsunade said, "Although your body is recovering, you still need to moderate your training. Alright, rest for a bit, and then you can go home."
After Yakumo was sent home, Shizune approached Tsunade alone. "Lady Tsunade, did you really find nothing?"
Tsunade walked to the window, her expression turning serious.
Knowing Tsunade well, Shizune immediately realized something was amiss and asked, "Lady Tsunade, did you discover something?"
Tsunade spoke gravely, "I detected traces of the First Hokage's chakra in Yakumo's organs."
"The First Hokage's chakra!?" Shizune was shocked, then asked, "Did the Kurama clan conduct some kind of human experiment on Yakumo?"
Tsunade shook her head. "No."
Shizune breathed a sigh of relief.
However, Tsunade continued, "It's precisely because there are no signs of surgery on Yakumo's body that this situation is particularly bizarre!"
Shizune frowned. "Indeed! If no surgery was performed, why would there be traces of the First Hokage's chakra in her body?"
Tsunade corrected her, "No, she doesn't have the First Hokage's chakra in her body. What I detected was a trace of its presence."
"A trace?"
Tsunade recalled the examination. "I carefully examined her body. Her organs do show signs of being nourished by high-quality Yang Release chakra, but I didn't find any abnormal chakra in her body! If I weren't so sensitive to the First Hokage's chakra, I might not have even detected the residual trace."
Shizune looked astonished. "How could this be?"
"Sigh, I can't figure it out either!"
Tsunade sighed.
She knew better than anyone how domineering the First Hokage's cells were. After the First's death, she was well aware of the village's large-scale human experiments attempting to recreate the 'Wood Release'.
This was why she was so puzzled by the trace of the First Hokage's chakra in Yakumo's body.
Logically, only someone who had transplanted the First Hokage's cells would retain traces of his chakra. As far as she knew, only one person in the entire shinobi world had successfully endured the transplantation of the First's cells.
"Could it be that he transferred his chakra into Yakumo's body...?"
Tsunade frowned slightly, her mind filled with various speculations.
At this moment, Shizune asked another question. "Lady Tsunade, is that 'monster' inside Yakumo still growing?"
At this, Tsunade's frown deepened. "That 'monster' is gone."
"What!?"
Shizune was stunned.
In an empty hospital room at Hidden Leaf Hospital.
Shinji asked, "How is it?"
Ido, looking at her own body, marveled, "This is incredible! Leader, how did you do it?"
As Yakumo's unconscious entity, Ido couldn't stray far from Yakumo. She could only escape Yakumo's mental world in the form of a spirit when Yakumo fell unconscious.
However, now that Yakumo had been sent back to the Kurama clan's estate, Ido remained in the hospital as a spirit, free from her usual constraints.
Shinji smiled but didn't explain. Instead, he continued writing his experiment notes.
Without a doubt, Ido's ability to move independently of Yakumo was the result of one of his experiments.
He had discovered that his newly fused Hogan seemed to possess a special ability to perceive and amplify spirits like Ido.
Thus, he attempted to infuse the Hogan's ocular power into Ido's spirit. As expected, Ido not only gained a temporarily stable spirit form but also the ability to move independently within a certain range, free from Yakumo.
This meant that even if Yakumo was under the village's surveillance, Ido could still act on Shinji's behalf.