Ren didn't go home.
He stayed.
Standing beneath the glow of streetlights, surrounded by the quiet movement of the city, his mind locked onto a single number.
¥1,500 remaining.
It wasn't much.
But it was enough.
Enough to reach the limit.
Ren's fingers brushed lightly against his phone as he thought.
This was the point where most people would stop.
Where they would say:
This is enough for today.
Test it tomorrow.
But Ren knew himself.
If he walked away now—
There was a chance he wouldn't come back to this with the same clarity.
The same focus.
The same momentum.
"…Finish it."
The decision came quietly.
But firmly.
He stepped into the nearest convenience store.
The same kind of place where all of this had started.
Inside, everything felt ordinary again.
Too ordinary.
Ren walked through the aisles, picking up small items without much thought.
Snacks.
A drink.
Something simple.
He didn't calculate the total precisely.
He didn't need to.
At the counter, the cashier scanned everything quickly.
"¥1,320."
Ren nodded and tapped his card.
The transaction went through.
He stepped aside.
And checked his phone.
[Daily Limit Remaining: ¥180]
Not zero.
Not yet.
Ren's gaze remained fixed on the number.
So close.
He stepped outside again.
Then paused.
"…Not done."
He turned back.
This time, he picked up a single item.
A small one.
¥180
Back to the counter.
Tap.
Transaction complete.
He didn't move immediately.
His phone vibrated.
Slowly—
He pulled it out.
[Daily Limit Remaining: ¥0]
Ren stared at the screen.
For a moment—
Nothing happened.
No new message.
No reaction.
Just—
Zero.
"…That's it?"
He frowned slightly.
That was… underwhelming.
He stepped outside again, the cool air hitting him as he exhaled slowly.
So that was the limit.
A clean cutoff.
No warning.
No penalty.
Just—
Stop.
Ren slipped his phone into his pocket.
Then—
He paused.
A thought surfaced.
If the limit was real—
Then exceeding it should fail.
Right?
Ren slowly pulled his phone out again.
He turned.
And walked back inside.
One more item.
Nothing expensive.
Just enough.
The cashier scanned it.
"¥500."
Ren tapped his card.
Beep—
The sound cut off.
The machine froze.
The cashier frowned.
"…That's strange."
Ren didn't move.
For the first time—
Something had gone wrong.
The terminal restarted slowly.
"…Sorry about that," the cashier said. "Could you try again?"
Ren looked at his phone.
No deduction.
No message.
Just silence.
He tapped again.
This time—
Transaction declined.
The cashier blinked.
"That's odd… do you have another method of payment?"
Ren shook his head slightly.
"…It's fine."
He stepped back, leaving the item behind.
As he walked out of the store again, his thoughts settled into something far clearer than before.
The system had limits.
Real ones.
And once you reached them—
It didn't bend.
It didn't adapt.
It stopped.
Ren walked into the night, his pace steady, his mind no longer uncertain.
This wasn't just an advantage.
It was a framework.
One that could be understood.
One that could be optimized.
And now—
He finally knew where the edge was.
[End of Chapter 9]