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A month quickly passed, and after the despair virus, Yoichi seemed to have no significant gains.
In his dreams, he worked as an electrician, a plumber, made noodles, and kneaded buns. However, while being an apprentice in these dreams, Yoichi didn't give up on gaining benefits. Instead of learning from these 'teachers,' he used his dream identity to gain other advantages.
Yoichi forcefully memorized some of the more backward technologies in the ninja world, such as the manufacturing blueprints for computers and micro-surveillance equipment. He remembered all of these in the context of the current urban background.
Although it was challenging to obtain these things in the dream world, he managed to get them. Upon waking up, he drew them out in detail and handed them over to his clansmen to manufacture.
The ninja world also had surveillance equipment, but they were large and easily detectable by ninjas.
With these equipment blueprints brought back from his dreams, Yoichi contributed to balancing the technological development of the ninja world. This prevented the ninja world's technology from developing unevenly, where some aspects advanced quickly while others lagged behind.
On the last day, he went to the world of One Piece, becoming Admiral Zephyr's assistant and training with the Navy.
He learned the training methods of the Six Powers, Armament Haki, and Observation Haki. Although he didn't personally experience the training process in the dream, he continuously asked questions and remembered the training methods.
Counting carefully, the [Disciple of All Worlds] ability brought Yoichi three and a half benefits: the cultivation method of the Gene Primordial Ability, the original data of the Extremis Virus, the Six Powers, and two types of Haki.
The last half was the Heavenly Desire Finger, which he absolutely wouldn't use.
After the [Disciple of All Worlds] ability, Yoichi drew a new ability.
[Study God Buff]: When entering a learning state, insight and concentration are doubled.
This ability wasn't too bad for Yoichi, who had recently been researching how to improve medicinal pills. It was a significant help.
Most of the pills in "Battle Through the Heavens" required magical beast cores, and pills without them were rare. Yoichi needed to improve those that required beast cores, even if it meant reducing their effectiveness, as long as they could be reproduced.
Mina was about to give birth in half a month, and Yoichi would become a father. Although they hadn't had a wedding ceremony, everyone saw Mina as his wife.
Then there was Mikoto. Although she was the wife of the former clan leader, no one in the clan objected to her relationship with Yoichi. She was also considered his wife, albeit with some strangeness.
Kakashi also visited once, and Mina performed surgery on him using a shadow clone since her large belly made it inconvenient for her.
After the surgery, Kakashi had fused with Hashirama cells. After some adaptation, he would be able to use Wood Release.
Upon waking, Kakashi felt his body brimming with power. His chakra had significantly increased, and even keeping his Sharingan active wasn't a burden anymore.
However, his Sharingan was no longer the Kamui Sharingan, as Yoichi had replaced it with a regular three-tomoe Sharingan.
Kamui was possibly the most powerful eye technique Yoichi had seen. It came with its own Kamui dimension, whose size was unknown.
Izanagi was also a powerful eye technique, but compared to Kamui, it was different.
After obtaining the Kamui Sharingan, Yoichi immediately wanted to get the other eye. However, after some thought, he suppressed this idea.
The ninja world still needed an organization to attract attention and help him collect tailed beasts. Obito just happened to fill this role. When Obito plunged the ninja world into chaos, a hero would be needed to save it.
"No matter, in the end, it will all be mine."
Yoichi suppressed his impulse. With the Gene Primordial Ability cultivation method, he and many others could break through the lifespan limit, so there was no rush.
Information and power surpassing the Otsutsuki clan were the confidence that the Uchiha clan had in manipulating the ninja world.
"Yoichi-sama, these are the military ration pills I made. Please have a look."
Rin, with some soot marks on her face, didn't mind at all as she held a military ration pill and approached Yoichi.
In the vast underground space, Yoichi was the only one who talked to Rin. He was her savior and willing to take her as a student and teach her ninjutsu. So, Rin cherished her time with Yoichi.
Even when making medicine, she preferred to be in the same lab.
"Well done, Rin. The effect is just as expected. It seems you have a talent for making medicine."
After tasting the military ration pill and feeling its effect, Yoichi smiled and praised Rin.
"It's all thanks to your excellent teaching, Yoichi-sama."
Rin's face lit up with a sweet smile, causing Yoichi to smile as well. Unconsciously, he patted her short, reddish-brown hair.
No wonder Obito was so attached to her. Such a heartwarming, sweet smile was rare in the ninja world.
If Yugito could be as gentle as Rin, it would be great. That girl was too tsundere.
"By the way, Rin, Kakashi is fine now. I transplanted Hashirama cells into him, so he will become stronger."
Yoichi shared this news with Rin and then smiled, "I'll also help you transplant Hashirama cells sometime later to make you stronger."
As for the timing, it depended on when Yoichi felt Rin had truly become loyal to him. Otherwise, after the transplant, she could leave anytime.
Yoichi gave Rin some more guidance and, after checking the time, said goodbye. Although Rin was reluctant, she smiled and saw him off.
In the coming years, only Yoichi would keep Rin company.
Previously, Yoichi would spend a whole day in the lab, where there were also workers. Now he returned home in half a day, wanting to spend more time with Mina before her delivery.
When Yoichi returned home, Mina and Mikoto were there, along with Kushina, and they were eating lamb hotpot.
However, it was a clear broth, as only Yoichi liked spicy hotpot at home.
"Yoichi-kun, you're back."
Mikoto, as always, gently stood up to prepare tableware for Yoichi.
Kushina looked at Yoichi with some resentment. Besides thinking he was a playboy for wanting to marry two wives, she also remembered how he had exploited her during the Nine-Tails chakra extraction.
Not considering Mina's feelings at all.
Before Yoichi could sit down, Mina said, "Yoichi-sama, you're going to be a father again."
"Again?"
Yoichi glanced at Mina's belly, remembering it wasn't twins, and then immediately looked at Mikoto. The beautiful woman's smile indeed carried a hint of happiness.
"Mikoto, is it you?"
"Yes, I felt unwell this morning and went to the hospital for a checkup."
Mikoto smiled. Upon learning she was pregnant, she felt her life was complete. The future seemed perfect, with daily family life and managing clan business occasionally.
Yoichi, pleasantly surprised, said, "It seems we have double happiness recently. Mikoto, don't overwork yourself. Leave the clan business to others until after the baby is born."
"I understand, Yoichi-kun."
Mikoto smiled softly as she placed the tableware in front of him.
Kushina, with wide eyes, said, "You're too lucky, coming home to have Mikoto and Mina do everything for you!"
"If you're envious, you can learn."
"Minato treats me well, so I don't need to learn."
Though she said this, Kushina had been alone at home for over two months. She hadn't even had the chance to tell Minato about her pregnancy.
Kushina, feeling indignant, picked up a piece of lamb, saying, "When Minato becomes Hokage, I'll make sure he gives you lots of missions, and Mina and Mikoto can stay at my house."
"Hmph, keep dreaming. The reality is you're bored at home and came to my place. If you beg me, I'll try to reduce Minato's tasks."
Kushina snorted, "Why should I beg you? You're not the Hokage."
"I'm the Hokage's advisor and will be the Fifth Hokage. Since you don't want to beg, forget it. But I'm not heartless; I'll give Minato a break when your child is born."
Yoichi began eating, leaving Kushina conflicted. She wasn't sure if he was serious.
If Minato had no breaks, she'd be alone often.
Kushina debated whether to soften up to Yoichi, knowing his stubbornness and authoritative nature.
"Let's eat, Kushina. Yoichi-kun is joking."
Mikoto, seeing Kushina's conflict, gently said, offering her some meat. "I'll give you a special membership card tomorrow so you can buy limited magic lamb. The farm is expanding, so availability should increase in a few years."
Kushina half came to celebrate with Mikoto and half to satisfy her cravings. She hadn't had magic lamb in a long time and had to queue early in the morning to get it.
"Yoichi-sama," Mina suddenly asked, "what if the tailed beast breaks free during childbirth? Any solutions?"
"No solution, just let the sealing team handle it. The Fourth Hokage will arrange it."
Seeing Kushina staring at him, Yoichi continued, "What are you looking at? Do you expect me to watch over you? Even if I agree, ask Minato if he does."
"I didn't mean that. Just asking if there's a way to keep the Nine-Tails calm."
Kushina quickly explained, knowing the method was impractical. As someone who controlled the Nine-Tails, she wondered if any Sharingan could help.
"Don't even think about it. Ordinary three-tomoe can't hypnotize the Nine-Tails; maybe Mangekyō Sharingan. My ocular power was strong, but I could only control the Nine-Tails for ten minutes."
Yoichi said, "Besides me, no one in the clan can control tailed beasts. Let the sealing team help; they'll prepare the seals properly."
He wasn't sure if Obito would interfere. But with so many strong ninjas in Konoha, including himself, it was unlikely.
Yoichi hoped Obito wouldn't foolishly attack Konoha, losing the only tool for collecting tailed beasts and forcing him to do it himself.
"Yoichi-kun, how do you feel?"
Mina asked worriedly after Yoichi changed his eyes. According to him, the further the bloodline, the higher the risk of failure in fusing ocular powers.
But no one in the clan had closer blood ties and the Mangekyō Sharingan.
After considering, Yoichi felt he could try fusing Fugaku's ocular power and asked Mina to help.
This was probably her last surgery before giving birth, as only with her help could Yoichi feel at ease.
"I'm fine. I can feel the ocular power merging, so no need to worry."
Yoichi, with bandages on his face, reassured Mina. His eyes had a slight sting, but the power was slowly merging, similar to absorbing chakra from a star stone.
Though he missed Izanagi, if he could merge into an Eternal Mangekyō Sharingan, it wouldn't be a loss.
With Kushina now pregnant, Yoichi planned to try extracting Asura's chakra from Naruto after his birth. If successful, his eyes could evolve into Rinnegan.
Madara took decades to evolve his eyes with a fraction of Asura's chakra. With the complete chakra, Yoichi might evolve in a few years.
(End of Chapter)