Ryu's eyes opened. He was back in his room, moonlight streaming through the window. The dream training with Kiyomizu Otsutsuki had ended, but his mind was still racing.
He sat up, staring at the ceiling.
Without a person who can form those Yin-Yang perfect spheres, learning it would be impossible unless you're born with an innate talent for it, he thought. I'm lucky the moon people reached out to me. And they agreed to teach me.
His mind sped up, jumping from training to how he could use it.
Yin-Yang layering isn't just for special attacks or chains. His fingers tapped lightly against his chest. With the right cores and shells, I can make weapon blades, small shields, precise tools—anything. I can make the Rasengan stronger instead of only using rotation.
Then another idea hit him.
"I can form chakra structures inside the body," Ryu said aloud.
He sat up straighter, eyes sharpening as the thought expanded.
Alternating micro-patches of Yin and Yang on the body's tissues... If I layer them correctly on internal organs, the attraction between them would create cohesion. It would reinforce them from within.
His hand moved to his abdomen, feeling the muscles and organs beneath.
It would raise the durability of my insides significantly. Heart, lungs, liver, kidneys—all reinforced at the cellular level. Like armour built into the tissue itself.
He frowned slightly.
But it won't be simple. Creating alternating Yin-Yang patterns at such a microscopic scale... The mental load would be enormous. Maintaining thousands of micro-patches simultaneously across different organs, each with precise ratios...
Then he thought of his seal.
Maybe the [BodyGPT] could help. It already handles minute muscle control instinctively. If I train it to recognise the pattern, it could share the mental load—or even learn to maintain the reinforcement automatically at the cellular level.
His eyes narrowed with determination.
It won't be easy. But if I manage it once, it becomes replicable. A small smile formed. It will be like having [Armament Haki]. Well, it's not an impossible thought, as these blindOtsutsuki have a kind of [Observation Haki].
He filed the idea away for future experimentation.
A force of attraction inside the body. His thoughts shifted to another application. What about someone who is suffering from a weak body... weak like smoke in the air?
He paused.
The Iburi Clan. Their smoke transformation uses Yin Release. Their problem is they can't hold themselves together once they turn to smoke. If they could form a stable Yang anchor—a dense core inside their bodies—their dispersed smoke would be drawn back to the centre instead of drifting apart.
He pictured an internal Yang core acting like gravity, a fixed point the smoke couldn't escape from.
Will Kiyomizu and Taro let me teach their method to those outside the Hamura Clan? he wondered. Probably not the whole technique. But they must have a simpler version—a single-purpose jutsu. Something like a basic Yang Anchor-Core that they could give away. A single-function construct instead of the full Yin-Yang manipulation system.
He thought about his position.
They need me and my technology, my knowledge of solar power, and my satellite designs. That gives me leverage. A calculating smile formed. I can trade one of my jutsu for a simplified anchor jutsu.
Slowly, the smile widened.
I didn't just find help for Akihiro. I might have found a way to save the Iburi Clan.
He lay back down, letting his muscles relax while his mind kept working.
Finish the satellite launch, he decided, closing his eyes. Then get busy building a new home for the moon.
With that, Ryu slept peacefully, while the [InstinctGPT] seal on his body consolidated the training he'd done.
The next morning — Hamura Industries conference room
Ryu sat at the head of the long conference table. Kaori stood beside him, arms crossed, while several engineers and project leads occupied the seats around them.
"Let's start with the satellite project," Ryu said. "What's the current status?"
One of the engineers nodded. "No problems, sir. Launch in four days. All systems checked and ready."
"Good." Ryu leaned forward slightly. "What about the MRI project?"
One of the engineers shifted uncomfortably. "It's held up, sir. The computing power is too slow. The size of the computer itself is an issue—we can't maintain the required computing power without making it too large to be practical."
Ryu nodded slowly. "That will be my next aim after the satellite launch. Computing architecture needs to be redesigned from the ground up." He paused. "That's a fundamental limitation we'll address soon enough."
He straightened. "Now let's move on to the other projects. I want updates on everything—IronHeart City, the infrastructure, the lodging facilities. What's working, what's not, and what needs my attention?"
Kaori had already gathered all the information. She stepped forward slightly, opening a folder. "IronHeart City has sped up after we deployed the prototype electric wagons. Charging facilities have been set up at key points, and essentials are now being transported across the river city."
She paused. "But due to uneven roads, the delays are still too much. The roads are being flattened using the prototype machines, but it will take some time."
One of the senior engineers spoke up. "If I may add, sir—the cutting machines, welding machines, induction heating, and molding machines you introduced have changed everything. Prototyping and manufacturing are moving many times faster than before. We're running multiple projects simultaneously now. Every day the work is faster than yesterday."
Ryu nodded. "That's the point. Efficiency compounds. Keep pushing."
"What about the furnace and the main facility?" Ryu asked.
"Worker lodges for families have been going smoothly," Kaori replied. "Many floors have already been occupied. The high-rise designs you provided were very stable and fast to build. River City had all the building resources, so there have been no issues."
Ryu nodded. "And the Iburi Clan compound? Has land been allotted by Lord Hokage?"
"Yes… land has been allotted," Kaori said. "Right next to the Hamura district."
Ryu pulled a scroll from his coat and handed it to her. "Open it. Civil team, take notes."
Kaori unrolled the scroll on the table. The moment it was fully opened, Ryu formed a hand seal.
-[Genjutsu — Mind Palace Projection activated]
A three-dimensional model materialised above the floor plan, shimmering with chakra. The projection showed an entirely underground facility with a glass castle on top, surrounded by an open park with maze-like glass structures and a greenhouse.
Ryu had pushed the detail further than necessary—every surface, every angle rendered with precision. He even simulated a real-world view, complete with lighting, shadows, and spatial depth.
The room fell silent.
The design was beautiful.
The civil team leader—a gruff man named Tetsu, recently recruited—leaned forward, eyes wide. "I've been a builder half my life," he said quietly. "But I've never seen such innovative designs."
Ryu gestured to the projection. "They've been living in a cave all their lives. I want to give them a sky view."
He manipulated the projection with a simple hand gesture. The view shifted downward, revealing multiple lifts leading to underground passages. The underground structure came to life in the 3D render—multi-story, expansive, detailed.
"They have medical issues, so I designed it to be windproof from top to bottom," Ryu explained. "It's underground, but there's no touch of it being underground or cave-like. The entire underground walkway and balcony will be lit by LED lights that simulate the real world. The greenhouse above will provide them self-sufficiency. Water collectors and oxygenators are built into the facility."
Ryu's internal thoughts remained hidden from the team. . It needs to be self-sufficient—water recycler, oxygenator, greenhouse, waste recycler.I built this with Moon City in mind. But they don't need to know that yet.
Tetsu stared at the projection, lost for words. "With facilities like this... they could stay inside the facility without coming out for years." He looked at Ryu, half-joking. "Is this a home or a fallout shelter?"
Ryu smiled faintly. "There will be more like this. Each will be better than the last design."
He looked around the table. "Is your team up to the task?"
Tetsu hesitated. "Digging up so much earth... it will take too much work. It will take too much time."
"We need to dig without disturbing the surface," Ryu said.
The team leader was again lost for words.
Ryu explained calmly, "In the future, we'll need to be able to make tunnels underground. This will be the perfect project to learn that capability."
Tetsu frowned. "How will we be able to do that?"
"You'll need to build this bottom-up, right from the centre," Ryu said.
He gestured again, and the projection shifted, rendering an underground digging machine. The 3D model showed how it worked—how it dug and, at the same time, laid a concrete structure to reinforce the cavity.
"It digs while simultaneously rendering the cavity structure stable," Ryu explained. "No collapse risk."
Tetsu studied the design carefully. "The excavation alone... we've never attempted anything at this depth. And coordinating the structural reinforcement while digging..." He exhaled slowly. "The scale of this project is beyond anything I've supervised."
"I know," Ryu said. "But this will be a good learning opportunity for you and your team. Don't be afraid of failures. Just ensure proper safety and use this project to expand your knowledge and skills."
Tetsu nodded slowly. "I'll try my best."
Ryu gestured once more, and the projection faded.
[Genjutsu — Mind Palace Projection deactivated]
The assistants exchanged glances—some excited, others nervous—but none objected.
One by one, the engineers and assistants stood, gathering their notes and leaving the room.
Silence settled once the last of them had gone.
Kaori stepped closer. "I found someone. A potential recruit for the family."
Ryu raised an eyebrow. "Already?"
She presented a file to him.
Ryu took it and read through the contents carefully—mission history, class evaluations, combat evaluations, medical and injury reports. A quiet, efficient shinobi profile stared back at him.
After a moment, Ryu's lips curled into a small smile. "A winter soldier," he muttered.
Kaori's brow furrowed slightly—she didn't understand the reference—but she said nothing.
Ryu closed the file and looked up. "What about the thing I asked for?"
Kaori set a closed briefcase on the table between them.
Ryu rested his hand on it for a moment. "Good. Bring it along. It will help convince him."
He picked up the file and tucked it under his arm.
"Let's go see him," Ryu said.
Kaori nodded and lifted the briefcase.
They left the room together, stepping out into the corridor. Footsteps echoed behind them—engineers already returning to work, carrying the impossible blueprints Ryu had just made possible.
A/N:
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