Time is currency. In the corporate world, this is a metaphor. In the shinobi world, where a split second determines life or death, it is a literal truth.
Nanami Kento had decided to embezzle as much time as possible.
Six months had passed since the "Boulder Incident" in the Senju garden. To the faculty of the Konoha Academy, Nanami Kento was a model student. He sat in the third row, answered questions with concise accuracy, and never caused trouble. He was quiet, attentive, and painfully average in his social interactions.
But the Nanami sitting in Daikoku-sensei's class was a lie.
It was a Shadow Clone. A construct of chakra and intent, programmed to take notes, nod at appropriate intervals, and endure the soul-crushing boredom of entry-level history lectures.
The real Nanami Kento was currently three miles away, in the secluded clearing of Training Ground 4, sweating enough to drown a small animal.
"Three thousand."
SNAP.
The sound of his fist cutting the air was no longer a soft whoosh. It was a sharp, cracking sound, like a dry branch snapping under a boot.
Nanami lowered his fist, exhaling a long, thin stream of white breath.
He stood in the center of the clearing, shirtless. His six-year-old body, while still small, had changed. The baby fat was gone, replaced by lean, corded muscle that looked like steel wire wrapped under skin. His shoulders were broader, his stance rooted into the earth as if he were a tree.
Six months.
He had increased the daily "Prayer" count from 1,100 to 3,000.
The motion—Prayer. Chamber. Thrust. Return.—had become liquid. He no longer thought about the mechanics. His arm moved before his brain issued the command. The "Gratitude" wasn't a conscious thought anymore; it was a background hum, a frequency his soul vibrated at.
"You're done?" a voice called out from the edge of the clearing.
Nanami turned, grabbing a towel to wipe his face.
Tsunade Senju was sitting on a tree stump, her legs swinging. She looked equally exhausted, her blonde hair escaping its ponytails in frizzy strands.
"I am done," Nanami confirmed. "Three thousand reps. The set is complete."
"You're a machine," Tsunade grumbled, hopping off the stump. "I did five hundred squats, and I feel like my legs are going to fall off."
"Your legs are fine," Nanami said, taking a sip of water. "They are reinforced with genetic lottery winnings. You will be fine."
Tsunade stuck her tongue out at him.
She, too, was playing hooky. On the first day, Nanami had sent a clone to school, and Tsunade had caught him. Instead of reporting him, she had demanded to be let in on the scheme. Now, a Clone-Tsunade sat next to Clone-Nanami in class, while the Real-Tsunade spent her days here, trying to punch trees into sawdust.
The bushes rustled, and Might Duy and Jiraiya emerged. They had joined the "Truancy Squad" recently, though lacking the Shadow Clone jutsu, they relied on crude dummies and luck to avoid detection.
"Youth has arrived!" Duy cheered, though he looked winded from his own workout. "Kento! Are we sparring today?"
"No sparring," Nanami said, sitting down on the grass to stretch his hamstrings. "Today, we analyze."
Tsunade sat down opposite him, wiping sweat from her brow. "Analyze what? I want to hit something."
"That is exactly your problem," Nanami said calmly. "You rely on 'hitting something' with maximum force. But what happens when the object you hit is heavier than you? Or stronger?"
"I hit it harder," Tsunade said immediately.
"Incorrect. You break your hand."
Nanami picked up a twig. He held it up.
"In physics, Force equals Mass times Acceleration. You have mass. You have acceleration. But you are six years old. If you fight a grown man, his mass overrides your acceleration."
He looked at the three of them.
"So, you don't fight the mass. You redirect it."
Nanami stood up and gestured for Tsunade. "Come at me. Full speed. Don't use chakra, just weight."
Tsunade stood up, frowning. She charged him, shoulder lowered like a battering ram.
Nanami didn't brace. He didn't plant his feet to stop her.
Instead, as she made contact, he exhaled and turned his hips forty-five degrees. He placed a hand on her back and applied a tiny amount of pressure in the same direction she was running.
Tsunade flew past him, stumbling, unable to stop until she hit a tree.
"Hey!" she yelled, rubbing her nose.
"I added two percent to your velocity," Nanami explained. "I didn't overpower you. I just extended your vector beyond your center of gravity."
He looked at Duy and Jiraiya.
"Efficiency isn't about being the strongest. It's about spending one calorie to make your opponent waste a hundred. If they push, you pull. If they pull, you push. You become a revolving door. They try to slam it, and they just end up outside."
Tsunade walked back, thoughtful. "Like water?"
"Like a budget," Nanami corrected. "Never spend your own capital when you can spend someone else's."
The sun began to set.
"Dispel," Nanami whispered.
Back at the Academy, his clone popped. The memories of a boring math test flooded his mind.
"Time to go," Nanami told Tsunade. "We have class."
"Ugh," Tsunade groaned. "Grandma time. Do I have to come? Ink smells bad."
"You are a Senju and Uzumaki. It is mandatory heritage training. And you need to work on your brush control if you ever want to master precision chakra."
They walked to the Senju compound together. The guards let them in without a word.
Mito Uzumaki was waiting in her study. The room smelled of ozone and high-grade parchment.
"You're late," Mito said, dipping her brush.
"We were discussing physics," Nanami said, taking his seat. Tsunade slumped onto a cushion next to him, looking like a prisoner on death row.
Mito handed Nanami a scroll on high-level barrier theory. Then, she handed Tsunade a sheet of practice paper and a beginner's brush.
"Tsunade," Mito said sternly. "Ten copies of the 'Storage' radical. And keep the lines straight this time."
"Yes, Grandma," Tsunade mumbled.
For the next two hours, the room was a study in contrast.
On one side, Nanami was engaged in a high-level debate with Mito.
"The Five Elements Seal," Nanami said, pointing to a complex diagram. "It uses an odd-numbered chakra disruption to block flow. But it's rigid. If the target has a Kekkei Genkai, the disruption becomes unstable."
"And your solution?" Mito asked, eyes gleaming.
"A variable-frequency lock," Nanami sketched a spiral. "The seal should oscillate. It reads the target's chakra pulse and matches it in reverse phase. An adaptive suppression."
"Brilliant," Mito whispered, tracing the design. "You are automating the suppression."
Over the last six months, Nanami had completely mastered the physical art of calligraphy. The bone brush no longer resisted him; it danced in his hand, an extension of his will. The lessons were no longer about how to write, but what to write. They had evolved into high-level engineering seminars where Nanami and Mito dissected the physics of chakra.
One evening, Nanami had brought up the inefficiency of standard Storage Scrolls.
"The seal architecture is outdated," Nanami had argued, tapping a scroll containing a bento box. "It preserves the object's form but fails to insulate against entropy. It leaks thermal energy. By lunchtime, my tea is lukewarm. It is unacceptable."
"You are redesigning a centuries-old seal... for the temperature of your tea?" Mito had asked, amused.
"Thermodynamics, Shishou. If heat escapes, the seal is porous. A porous seal is a failure."
That night, they engineered the Vacuum-Stasis Array. Nanami incorporated a wind-release radical into the storage architecture to create a vacuum layer around the stored object, effectively stopping heat transfer. It was a breakthrough in logistics that Mito noted could revolutionize medical transport for organs, though Nanami mostly used it to keep his tonkatsu crisp.
Another session focused on offensive utility. The standard Explosive Tag was a blunt instrument—loud, messy, and omnidirectional.
"Noise is wasted energy," Nanami critiqued, looking at the standard design. "The 'boom' is just shockwave dispersion that doesn't hit the target. We need to focus the vector."
With the mechanics of writing already second nature to him, he stripped the tag down to its core combustion logic in minutes. He replaced the standard 'Release' trigger with a shaped-charge geometric anchor. The result was the Silent Strike Tag. It didn't explode outward; it imploded inward, driving a spike of pure kinetic force directly into the surface it was stuck to. No fire, no deafening roar—just a quiet thump and a hole punched through stone.
"Deadly," Mito had observed. "And quiet. You are turning an artillery shell into a sniper bullet."
"Precision is polite," Nanami had replied.
On the other side of the table, Tsunade was waging war against the paper.
"Stupid... ink..." she muttered, her tongue sticking out. She pressed too hard, and the brush splattered black droplets across the page. "ARGH!"
Mito sighed, not looking up from Nanami's work. "Tsunade. Patience. You are trying to punch the paper. You must caress it."
"I hate writing!" Tsunade complained, wiping ink off her nose and smearing it further. "Why can't I just punch the enemy? Why do I have to put them in a scroll?"
"Because you cannot punch a ghost, and you cannot punch a curse," Nanami answered without looking up. "Fuinjutsu is the toolbox for problems that violence cannot solve."
"I'll find a way to punch ghosts," Tsunade muttered darkly.
Nanami smiled slightly. Knowing her future, she probably would.
"Kento," Mito said, pulling him back to their discussion. She tapped the diagram of his 'listening loop' theory. "The brushwork is flawless, as expected. I have no notes on your technique. But the logic... have you considered the feedback loop?"
"I have," Nanami replied confidently. "The loop is closed. It feeds the target's own chakra back into the suppression node."
"Show me," Mito commanded. "Not the drawing. The activation."
"Yes, Shishou."
Nanami dipped his bone brush. He didn't need to concentrate on the line weight or the ink flow anymore. He barely looked at the paper. His mind was entirely on the architecture of the spell, the invisible math that would bend reality to his will.
As the moon rose high over Konoha, Nanami felt the Netero template hum in approval.
Body honing. Mind sharpening.
He was getting ready.