Morning arrived before Kai was ready for it.
Not because he was tired—but because his mind had already been awake long before his body stirred.
He lay still on his thin futon, eyes open, watching dust drift lazily through a beam of pale sunlight. The house was quiet. Too quiet. That stillness always made him alert.
Six years old, he reminded himself again.
Six—and already beginning something dangerous.
He sat up slowly and pressed two fingers against his wrist.
Steady pulse.
Calm breathing.
No strain.
Good.
He wrapped the scarf around his neck, tying it carefully the same way he always did. The knot grounded him. Anchored him.
Today, he would begin properly.
Not playing.
Not imagining.
Training.
---
He slipped out before Oba-san woke.
The air outside was crisp, cool enough to sting his lungs slightly. Kai welcomed it. Cold sharpened awareness. He moved through the district quietly, feet light, steps measured, until the familiar path led him toward a small clearing near the edge of Azabu—one rarely used, shielded by uneven stones and thin trees.
No one came here this early.
He chose it deliberately.
Kai stood in the center of the clearing and closed his eyes.
This body is fragile, he thought.
Don't forget that.
He placed his feet apart, knees slightly bent, spine straight but relaxed.
Sun Breathing.
The first and most unforgiving form.
In his past life, it demanded perfection. Even then, it punished mistakes mercilessly.
Now, in a child's body—
He exhaled slowly.
Adapt.
---
Inhale.
Not deep. Not forced.
Just enough to fill the lungs comfortably.
He felt the air slide down his throat, cool and clean, expanding his chest. He focused on posture first—keeping tension out of his shoulders, his jaw, his hands.
Sun Breathing begins with form before flame, he reminded himself.
Exhale.
Slow. Controlled.
No visualization yet.
His body trembled faintly.
Too much?
He stopped immediately.
[Warning: Muscular fatigue detected.]
[Recommendation: Reduce intensity by 30%.]
Kai nodded internally.
Again—but gentler.
Inhale.
Exhale.
The rhythm settled.
Minutes passed. Or maybe seconds. Time blurred when focus narrowed.
He adjusted his stance slightly, recalling how his teacher once corrected him—how balance determined everything.
"You don't chase the sun," a memory whispered. "You let it rise within you."
Kai swallowed.
He wasn't chasing anything.
He was laying foundations.
---
Sweat formed at his temples despite the cool air.
His lungs burned faintly—not painfully, but insistently.
This is enough, he decided.
He lowered himself into a seated position, hands resting on his knees.
Recovery matters, too.
He closed his eyes and allowed his breathing to return to normal.
That's when he felt it.
Not heat.
Not flame.
Something gentler.
Warmth.
It bloomed faintly in his chest, spreading slowly—not forcefully—like sunlight seeping through paper-thin clouds.
Kai froze.
[Unknown physiological response detected.]
He didn't panic.
He observed.
The warmth didn't hurt. Didn't strain. It simply… existed.
So this is the beginning, he thought.
Not power.
Presence.
The warmth faded as his breathing normalized.
Kai opened his eyes.
His hands were trembling slightly—but not from exhaustion.
From excitement.
He clenched them slowly, then relaxed.
One step, he reminded himself. Just one.
---
Later that day, Mitsuri noticed immediately.
"You're acting weird," she said, mouth full of bread.
Kai blinked. "Define weird."
She leaned closer, peering at his face. "You're quiet. Even quieter than usual."
"That's statistically unlikely," he replied.
She giggled. "See? Weird."
He smiled faintly, but his attention drifted inward.
His body felt different.
Not stronger.
More… aligned.
Oba-san glanced at him from across the room. "You sick?"
"No," Kai answered honestly.
She frowned. "Then why are you eating slower?"
He paused. "I'm listening."
"To what?"
"My body."
She stared at him, then scoffed. "Brat."
But she didn't push him.
---
That night, Kai trained again—briefly.
Never twice in a row with intensity.
He focused on transitions this time.
Standing to seated.
Movement with breath.
Breath with awareness.
He remembered collapsing the first time he had tried Sun Breathing in his past life. Remembered the agony, the tearing pain, the failure.
This time—
No collapse.
Just limits.
And limits could be respected.
---
Days passed.
Spring deepened.
Kai established a rhythm.
Early morning: controlled breathing practice.
Midday: rest and observation.
Evening: light movement synchronized with breath.
Never exceeding his threshold.
Never chasing progress.
Still, his body changed subtly.
His posture improved.
His stamina increased.
His breathing became quieter—even at rest.
Hachiro noticed again.
"You're walking like an old man," the doctor said.
Kai tilted his head. "Slowly?"
"Deliberately," Hachiro corrected. "That's dangerous."
Kai smiled. "So is rushing."
The doctor clicked his tongue. "You'll outpace yourself."
"I don't intend to," Kai replied calmly.
---
One afternoon, Mitsuri followed him.
He realized it too late.
"Kai!" she called from behind a tree. "What are you doing out here every morning?"
He froze.
This was a mistake.
He turned slowly. "You shouldn't sneak up on people."
She pouted. "You're sneaking first!"
Fair.
"I'm practicing breathing," he said.
She blinked. "Everyone breathes."
"Yes," he agreed. "But not everyone listens."
She stared at him for a long moment, then plopped down on a rock. "Show me."
He hesitated.
Sun Breathing wasn't something to share lightly.
But… controlled breathing?
"That's fine," he decided.
"Sit," he instructed gently.
She did, mimicking him eagerly.
"Straight back," he corrected softly. "Relax your shoulders."
She adjusted.
"Inhale slowly through your nose," he continued. "Count to three."
They inhaled together.
"Exhale through your mouth. Count to four."
She coughed halfway through, then laughed.
"This is hard!"
Kai smiled. "It is."
They tried again.
And again.
And again.
Eventually, Mitsuri sat quietly, eyes closed.
"It feels warm," she murmured.
Kai's breath hitched.
"What kind of warm?" he asked carefully.
"Like… sunshine on my chest," she said.
He exhaled slowly.
So it wasn't just him.
"Good," he said. "That means you're doing it right."
She beamed. "I knew it!"
Kai looked away, hiding his expression.
This path spreads, he thought. Whether I want it to or not.
---
That night, alone beneath the wisteria tree, Kai reflected.
Sun Breathing was awakening gently—but undeniably.
His child's body accepted it better than expected, perhaps because it hadn't yet learned bad habits. Or perhaps—
Because he wasn't forcing destiny.
He touched the scarf.
I won't repeat my mistakes, he promised silently.
No recklessness. No arrogance. No burning too bright too soon.
Just steady light.
Above him, buds swayed gently in the evening breeze.
The sun had already set.
But its warmth lingered.
And within Kai's chest, faint but growing, something answered it.