Uchiha Souji didn't blink when the demon blade spirit asked about its own origin. He smiled calmly and said, "Oh, that? My parents found you somewhere long ago. Honestly, I don't know where you came from."
It was such a clean lie that even a professional interrogator might believe it.
But Guiche—being a knife—didn't.
A small voice inside him whispered:
He's lying to me.
But he was… a sword.
No hands.
No body.
No way to confirm anything.
So he just scratched his nonexistent head.
"Well, if that's the case… By the way, master, earlier you said you wanted me to help with math? I really want to help, but…" He looked down at himself. "I'm just a sword. I don't have hands."
Souji's grin widened—slowly, dangerously.
"Oh, don't worry. I don't need you to solve math problems."
"But…" Souji raised the blade with both hands as if presenting a sacred treasure. "Your master has encountered a VERY difficult problem. And only you, Onitoru-sama, can help me solve it!"
Onitoru's spirit felt every imaginary hair on his ghostly body stand straight up.
"W-Wait. What are you planning!? I'm telling you right now—I am JUST a sword! Don't start anything weird!"
Souji ignored the panic.
"As you know, my profession is ninja. And the destructive power of ninjas comes from chakra."
He lifted the blade higher.
"Chakra must be controlled. Manipulated. Shaped. The stronger your control, the stronger your ninjutsu."
The demon sword spirit trembled.
"What does this have to do with me!?"
Souji held the blade so their eyes met directly—his Sharingan glowing faintly, the blade's carved grimace staring back.
"My chakra talent isn't great. My control is weak. But YOU… you can control the body of others. If you can control a body, you should also be able to control chakra inside that body."
He smiled brightly.
"Instead of sitting in the blade and watching my battles like a spectator, why don't you help me by becoming my second brain?"
Guiche nearly fainted.
A second brain?
A sword?
Him??
He had heard stories of terrible human bosses who squeezed their employees dry…
But he NEVER imagined there existed a swordsman who would squeeze his own sword dry.
"Sorry, I refuse!"
He didn't even think about it.
Immediate rejection.
He lived comfortably inside the blade.
He watched Souji fight.
He got to eat souls occasionally.
Life was good.
Work?
Labor?
No pay?
NO THANK YOU.
Souji didn't argue.
He simply smiled and sheathed the blade again.
Guiche relaxed—
…
Then Souji pulled him out again, and the blade spirit froze.
Because this time, they weren't in the courtyard.
They were in…
A toilet.
A urinal on the left.
A toilet stall on the right.
Souji held the blade in his right hand and pointed dramatically.
"I recently researched old torture devices used on objects. I think… you will open your mouth very quickly."
Guiche felt the world spinning.
Souji continued cheerfully:
"As long as you cooperate, I'll use the best, most expensive oil to polish you every day. But if you don't…"
Souji pointed directly at the toilet.
"You will live under this toilet forever."
The demon sword spirit screamed inside.
"BEAST! YOU MONSTER!! A sword is a swordsman's partner! I gave up expecting to be your partner—but can you at least treat me like a living being!?"
Souji shrugged.
"If not, you can be a toilet ornament."
The boy stepped toward the urinal, lifting the sword.
The tip approached the yellow water.
Guiche panicked so hard his spirit almost disconnected from the blade.
"STOP! STOP!! I SURRENDER—NO— I COOPERATE! I COOPERATE!!"
Souji froze.
Then nodded.
"That's all you had to say."
He spun the blade gracefully and sheathed it again.
He had no idea whether this outrageous idea would work—letting the demon sword take over part of his chakra control—but…
If it worked, he could skip YEARS of training.
He could perform ninjutsu without hand seals.
He could let the sword manage chakra flow.
He could train faster than any child in the Academy.
He could cheat the entire system.
An all-purpose training assistant.
A ghostly Doraemon.
He was so pleased with this result that he walked out of the toilet smiling.
Which is exactly when…
the door of the next stall swung open.
Mizuki stepped out.
And witnessed Uchiha Souji smiling alone in the toilet while holding a sword toward a urinal.
Their eyes met.
Souji froze mid-smile.
Mizuki blinked.
Souji wanted to dig a three-bedroom apartment with his toes and hide inside forever.
"A-Ah… Mizuki. You came to the toilet too?"
The second the words left his mouth, Souji regretted everything.
His embarrassment reached a new level.
But Mizuki only scratched his head.
And then—
Suddenly, his eyes lit up with realization.
"Ah, Master Souji! My injuries have healed. You came personally to pick me up? I'm honored!"
Souji nodded immediately, relieved the man misunderstood everything.
"Yes! The mission is urgent. I came because you didn't show up."
Within minutes, the two were sitting inside the reception room. Mizuki held a warm cup of tea, sipping slowly.
He sighed.
"This tea is good… I haven't been able to find this flavor anywhere else."
He set the cup down and looked up.
"So, Master Souji. What mission requires me?"
Souji reached into his robes and pulled out a sealed scroll. He placed it on the tatami between them.
"I need you to travel to the Land of Wind."
Mizuki blinked.
"The Land of Wind?"
"Yes. This concerns an arrangement with the Sand. You will deliver something for me."
Souji pushed the scroll forward.
Mizuki picked it up, still confused.
He unrolled it—
White smoke burst out.
Puff!
A stack of new scrolls lay on the tatami.
Each one numbered.
Each one heavily sealed.
Mizuki picked up the scroll labeled 1, slowly opened it—
His eyes widened.
Inside were detailed medical records, diagrams of human chakra pathways… and something else:
The complete formula for a forbidden experimental technique.
The kind of technique the Sand would pay a fortune for.
Souji leaned back, expression calm.
"That is your task."
Mizuki swallowed nervously.
"What… what is this? Why me?"
Souji sipped his tea.
"Because you're loyal. You follow orders. And you owe me."
Mizuki shivered.
Then Souji leaned forward, lowering his voice.
"Do not open any scroll except the first one. Deliver them to the exact person written in the instructions."
Mizuki nodded rapidly.
"I-I understand."
Souji stood.
"Mizuki. Listen well."
The kunai-sharp coldness in his voice made Mizuki straighten instantly.
"This mission must remain secret. If anyone finds out… you will die. Not by my hand—by the Sand's."
Mizuki felt his throat dry.
But Souji smiled again.
"Finish this job, and I will reward you greatly."
Mizuki bowed deeply.
"Yes, Master Souji. I will not fail you!"
He grabbed the scrolls, sealed them, and rushed out of the reception room.
---
After Mizuki left
Souji sat alone.
Slowly, he pulled out Onitoru again.
"Alright, partner. Time to start chakra synchronization training."
The demon blade groaned.
"Do we have to…?"
Souji pointed toward the toilet.
"Do you want to go back there?"
"NO!"
"Good. Then let's begin."
He held the blade tightly.
"From today onward… you're my second brain."
The demon sword spirit screamed internally:
I am… living the worst possible life…
But Souji only smiled wider.
Because today…
a beast was born.
Not a demon or a monster.
But Souji himself—determined, cunning, shameless, brilliant—and now armed with a sword spirit he had successfully enslaved.
This was Uchiha Souji.
A boy who would rise not because he had talent…
But because he knew how to squeeze every drop of potential from everything around him.
Even his sword.
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