Garron didn't let Suguru sleep in.
Before dawn, he was already in the yard.
Waiting.
Suguru stepped out, shoulders sore, mind steady.
"You met them," Garron said.
Not a question.
Suguru nodded.
"They pushed," he said.
"Not to hurt. To see."
Garron exhaled slowly through his nose.
"Good. Then we're ahead of schedule."
That wasn't comforting.
They didn't pick up blades.
They didn't drill footwork.
Instead, Garron drew a single line in the dirt with the end of a stick.
Thin.
Simple.
Unremarkable.
"Step over it," Garron said.
Suguru did.
Nothing happened.
Garron erased it.
Drew it again.
"Now step over it," he said, "without crossing it."
Suguru frowned.
"That's impossible."
"Yes."
Silence.
Garron stood across from him.
"What you felt yesterday," he said, "is called the Boundary."
Suguru's chest tightened slightly.
"The Boundary?"
"It's the space where Aura ends and Mana begins."
The words settled heavily.
"Aura," Garron continued, "is structure inside your body. Breath. Bone. Balance. It's yours."
Suguru nodded.
He understood that much.
"Mana," Garron said, "is not yours."
That part landed colder.
"It moves through the world. Through everything. When your structure weakens, it pushes in. When your will reaches outward recklessly, it pulls you with it."
Suguru thought about the thin line he'd felt.
The cold brush.
The temptation to answer it.
"The Boundary," Garron said quietly, tapping the line in the dirt, "is where most people break."
Suguru looked down.
"Break how?"
"Either they collapse inward — losing control of their bodies."
"Or?"
"Or they reach outward too soon."
Suguru didn't need more explanation.
He'd felt how easy that would've been.
"The one who tested you," Garron continued, "was checking if you knew where your Boundary was."
"And?"
Garron's eyes held his.
"You didn't cross it."
Silence hung between them.
Suguru stared at the thin line in the dirt.
"So what happens when someone does?"
Garron didn't look away.
"They stop belonging to themselves."
Not death.
Not explosion.
Worse.
Loss.
Suguru inhaled slowly.
"So I just… stay inside it forever?"
Garron's mouth twitched faintly.
"If that were possible, the world would be simple."
He stepped forward.
Erased the line with his boot.
"There will come a time when you must step across."
Suguru's pulse ticked upward.
"But not because you panicked."
Not because you were tempted.
Not because you were provoked.
"Only when your structure is strong enough to return."
That thought unsettled him more than anything else.
Return.
Meaning you could get lost.
"Why now?" Suguru asked.
"Why are they watching?"
Garron looked toward the outer city.
"Because someone felt you stabilize under threat."
"The street fight?"
"Yes."
Suguru frowned.
"That was nothing."
"To you."
Garron's tone sharpened slightly.
"But to those who measure instability in this city… someone standing calmly during violence is never nothing."
They trained after that.
But it wasn't about stepping or striking.
It was about awareness.
Garron would circle him without sound.
Change breathing patterns subtly.
Shift presence.
Suguru's job wasn't to react.
It was to notice without tightening.
Every time his shoulders rose—
Garron tapped his sternum.
"Inside," he'd say.
Every time Suguru's focus drifted outward too sharply—
Garron tapped the back of his neck.
"Boundary."
By sunset, Suguru's mind felt more exhausted than his body ever had.
That invisible line was everywhere now.
In breath.
In tension.
In thought.
That night, alone on his mat, he closed his eyes.
He didn't search for mana.
He didn't push his awareness outward.
He just observed.
Inside.
Breath steady.
Spine aligned.
Aura present.
At the very edge of perception—
the Boundary hummed faintly.
Not threatening.
Not inviting.
Just there.
Like a shoreline in darkness.
And somewhere in the city—
The one who tested him stood on a rooftop again.
Watching the ward.
Not smiling.
Not relaxed.
Because Suguru hadn't crossed the line.
But he had touched it.
And that meant the world would soon decide—
whether to leave him alone.
Or force him over it.