Reborn in Konoha, Sailing to the Grand Line

On Ethan's Side

As time passed, Ethan's body grew stronger with each passing day.

The essence of his life force, once drained, was now replenished with a steady supply of medicinal nourishment and Sea Kings meat. Under the careful regimen of health-preserving exercises, his recovery accelerated at an astonishing rate. His muscles became firmer, his agility improved, and even his height had increased once again.

Four days later, after extensive research, Kureha successfully created two revolutionary formulas: the Super Nutrition Potion and the Body-Building Potion. These were unlike anything that had been developed before, capable of enhancing vitality, accelerating healing, and fortifying the body beyond its natural limits.

Recognizing the immense potential of these potions, Ethan set to work immediately. Within two days, he successfully crafted multiple weakened variations of both formulas. The potions now came in different strengths, ranging from one-tenth potency to as high as eight-tenths, ensuring accessibility for different individuals depending on their needs and chakra reserves.

But he didn't stop there.

Understanding the necessity for long-term sustenance, Ethan combined Sea Kings meat with various medicinal compounds, resulting in Nutrition Pills that could be ingested conveniently. These pills varied in concentration, ranging from 10% to 90% effectiveness, ensuring a customizable approach to healing and energy restoration.

Breakthrough in Medical Alchemy

Seven days later, Ethan achieved another breakthrough.

Through countless refinements and experimentation, he successfully weakened the conditioning potion, which was originally designed to heal hidden injuries and restore depleted vitality. But that alone wasn't enough for him. He needed something more—something revolutionary.

Using his extensive knowledge of both nutrition pills and potions, Ethan formulated a brand-new potion—one that could replenish massive amounts of vitality in a short period while remaining gentle on the body. It had the power to restore near-depleted life force without adverse side effects, something that no existing medicine had been able to do.

Holding the bottle of glowing golden liquid in his hand, he examined it with satisfaction.

"Hmm... This should perfectly solve Uzumaki Mito's problem—if her condition is truly just excessive vitality depletion," he mused to himself, swirling the liquid thoughtfully.

At this moment, he realized something profound.

After years of dedicated study, his medical skills had finally broken through to the small success level, a major milestone in his journey. But even within this level, he had already surpassed most conventional doctors. His expertise wasn't just in medicine—it extended into alchemy, biology, and chakra manipulation.

But there was still much more to achieve.

The Value of a Miracle

Just as he was reveling in his success, a familiar voice interrupted his thoughts.

"Oh? That potion in your hand—it's quite impressive!" Kureha's voice carried a hint of amusement as she walked over, her sharp eyes assessing his creation. "Especially for someone like you, who extracts cell energy through chakra. This could be a game changer for shinobi."

She tapped the bottle lightly, watching the gentle golden glow pulse from within. "With this, you might finally break free from the problem of shortening your lifespan every time you overuse your chakra. But I have to ask—how expensive is this miracle of yours?"

Ethan smirked at her words, nodding. "You're right. This isn't something that can be made cheaply. The potion requires large quantities of Sea Kings meat and rare medicinal ingredients."

He paused for a moment, calculating the cost in his head. "If converted into Bailey, the production cost alone comes to around five million per bottle. And that's with a relatively simple refining process. If I can improve the extraction method and production efficiency in the future, the cost will go down significantly—but for now, this remains an extremely high-end medicine."

Kureha whistled. "Five million per bottle, huh? That's practically worth a Kage-level ransom in some places!" She chuckled. "But with effects like these, I doubt anyone would hesitate to buy it. Shinobi would kill for something like this—especially those with heavy combat lifestyles."

Ethan nodded but remained contemplative. "Yeah… but that's the issue. Right now, I lack the technology to mass-produce this efficiently. The refining process is long and complicated. If I had access to advanced production lines, I could cut costs dramatically."

He crossed his arms, deep in thought. "If I had someone who specialized in biological and mechanical engineering, they could help improve the process… Maybe Orochimaru?"

For a moment, he seriously considered reaching out to him.

But then he shook his head. "No. At this point in time, Orochimaru's scientific knowledge is still too limited. And worse, he's still a staunch follower of the Third Hokage. I can't risk getting involved with him just yet. He's not ready."

His mind drifted toward the pirate world instead. "Maybe I should look into alternative sources... Germa 66?"

Germa's cutting-edge technology in biotechnology and pharmaceuticals was far ahead of what the shinobi world currently had. If he could get his hands on their knowledge and repurpose it for his own use, he could revolutionize medical science in Konoha.

But he immediately dismissed the thought. "I don't have the strength to pull that off yet."

His gaze darkened slightly. "I need more power. More influence. And more allies."

A Lone Genius Needs A Strong Right Hand

He sighed. "Mom is already dealing with too many things right now. I can't keep relying on her for everything. This life potion is valuable, but it's not urgent—I can set it aside for now."

But what he truly needed was something far more pressing.

"I need a trusted, powerful enforcer—someone who can handle things in my place, so I can focus on research and development."

A shadow passed over his expression. "I lack a right-hand man. A thug who is both intelligent and ruthless. Someone unwaveringly loyal, yet strong enough to enforce my will when needed."

He clenched his fist. "Without that, I'll always be forced to handle everything myself. And that's not sustainable."

Looking at the glowing bottle in his hand, he made a silent promise to himself.

He had already overcome one great obstacle by creating the Life Potion.

The next step?

Building an empire of strength and influence to ensure his survival and dominance in both worlds.

And he would start right now.

Chapter Title: The Awakening of Potential

Ethan's Progress

Fortunately, Ethan had little need for the Life Potion at the moment.

Now that his body was almost fully restored, he knew that simply relying on nutritional potions and pills would be enough to sustain his vitality and energy. His once-weak constitution was now a thing of the past, and with each passing day, he could feel his strength solidifying.

"You've done well," Kureha remarked, shaking her head as she examined the potions he had refined. "But you should know better than anyone—the stronger a potion is, the harder it is to refine. That's the nature of medicine."

She crossed her arms and gave him a scrutinizing look. "You'll be fully recovered in just a few days. That means you still owe me a lot of medical books."

She smirked. "So, tell me—will you keep coming back here even after you're healed?"

Ethan chuckled, nodding without hesitation. "Of course! Even when I've fully recovered, I'm still not strong enough to go out and travel freely. Besides… I still have thousands of medical books to study, and I haven't even learned all of your medical techniques yet!"

He grinned, leaning forward slightly. "How could I possibly leave before squeezing every last bit of knowledge out of you?"

In truth, he had another goal as well—to win Kureha's favor completely.

At the moment, her affinity toward him had risen to 72 points, which was a significant step forward. He estimated that with a few more months of training and discussion, he could push it past 80 points—a number that would secure her trust entirely.

Of course, as favorability increased, so did the difficulty of improving it further. But with continuous discussions, exchanges of medical knowledge, and meaningful interactions, he believed it was just a matter of time.

"Hah! You're a greedy one, kid!" Kureha laughed heartily. She pointed at Ethan with a teasing smirk. "You think you can just absorb my knowledge so easily? You better be prepared to stay here for a long time!"

She turned back toward her recliner, grabbed one of the many medical books, and flipped it open. "We'll see if you have what it takes."

Ethan smirked. He wasn't going anywhere.

A Month Later – Complete Recovery

Days turned into weeks, and before he knew it, Ethan had spent almost a full month on Drum Island.

Today, however, marked an important milestone.

His body—once fragile and crippled—was now completely restored.

Even more than that, his life force had not only returned to normal but had exceeded his previous limits. His practice of health-preserving techniques had led to significant enhancements in his body's resilience, and the effects of his restoration had caused an unexpected feedback loop, further amplifying his life source.

Now, his physique was several times stronger than most of his peers in the Ninja World.

Updated Status

............

[Uchiha Ethan]

Talent: Space-Time Gate, God Rewards Hard Work

Lifespan: 95 years, 7 months, 19 days (Life Origin: 13.2)

Chakra Attributes: Water, Wind, Fire, Earth, Yin, Yang

Skills:

Uchiha Chakra Refining (1/100, Entry Level)

Medical Skills (7,568/50,000, Minor)

Health Preservation (5,145/10,000, Major)

Uchiha Meditation (456/1,000, Grandmaster)

Basic Physical Skills (342/500, Proficient)

............

Ethan's eyes gleamed as he analyzed his current status.

"Hah! Finally recovered! My lifespan has reached over 95 years. If I keep practicing Health Preservation, I might even break the 100-year mark before long!"

The thought sent a thrill through him.

He had put in countless hours of effort during this month of recovery, and now he was finally reaping the rewards.

"Now that my body is stable, I can finally start training in Chakra, Ninjutsu, Taijutsu, and even advanced techniques like the Six Styles and Haki!"

Of course, he needed to be strategic in how he approached his training.

For instance, Six Styles and Haki required a gradual build-up, as forcing his body to adapt too quickly could result in unnecessary strain. Likewise, Chakra training had to be handled carefully, even with nutritional pills and potions aiding in his recovery.

"I can't afford to rush things. Every step has to be calculated."

Then, something unexpected caught his attention.

"Huh? I awakened the Yang Attribute? That's… a pleasant surprise!"

He hadn't expected this, but it made sense.

With the amount of Sea Kings meat he had consumed over the last month, his body had been constantly nourished with immense life energy. This likely accelerated his vitality, making his Yang chakra emerge naturally.

A grin stretched across his face. "This will make practicing Medical Ninjutsu and Yang Release so much easier!"

But then another thought struck him.

"The only element I'm missing now is Lightning. If I could obtain that, I'd have a perfect balance of chakra attributes!"

He pondered the best way to acquire it.

"Maybe… I could consume a Thunder Fruit? Would that awaken my Lightning Attribute naturally?"

It was a tempting idea. But there was one major drawback—Devil Fruits came with a fatal weakness.

"I'd be vulnerable to sea water in the Pirate World. That's a serious disadvantage."

While it was true that Ninja World seawater wouldn't have the same effect, he couldn't ignore the risk.

"One day, I'll have to dominate the Pirate World as well… and if I have a Devil Fruit's weakness, I'll be at a disadvantage."

He furrowed his brow. "Unless… there's a way to eliminate that weakness?"

For now, he had no answer.

Sighing, he decided to set the thought aside for later.

"I'll figure it out when the time comes."

With that, he greeted Mikoto and Kureha, exchanging a few words before activating his Space-Time Gate.

In the blink of an eye, they vanished—returning home to the Ninja World.