Meiji 40 (1907) — Early Spring to Early Summer
Kai — Age 15
Spring did not arrive all at once.
It came in fragments—melting snow along mountain roads, mud clinging to sandals, buds forming where blood had once soaked into earth. And with it came separation.
The first time they stood at a crossroads, it felt wrong.
Four crows circled overhead, each calling a different direction.
"Split assignments," Shinobu read aloud, already knowing. "Solo missions."
Mitsuri's smile wobbled. "We've… never done that."
Kanae placed a hand on her shoulder. "That's why it's time."
Kai said nothing. He only looked at each of them—really looked—memorizing posture, breath, the small tells that told him they were ready.
"You don't need me watching," he said calmly. "You already know what to do."
Shinobu scoffed. "I know. That doesn't mean I like it."
Mitsuri hugged him without warning. Tight. Fast. "Don't get hurt!"
Kanae smiled, gentle but steady. "We'll meet again. Stronger."
They separated without ceremony.
The road swallowed each of them whole.
---
Mitsuri — Solo Mission One
The village was quiet. Too quiet.
Mitsuri noticed it immediately—the way doors were shut despite the sun still being high. The way dogs did not bark.
She swallowed, heart pounding.
I can do this.
The demon revealed itself at dusk—tall, grinning, fast.
Too fast.
Her first strike missed by inches.
"Oh—!" She stumbled, barely recovering.
Fear surged—sharp, old, familiar.
Then she remembered Kai's voice.
Breathe first. Move second.
Her breath steadied.
Love Breathing flowed—not wild, not desperate. Controlled. Intentional.
The demon never landed another hit.
When its head fell, Mitsuri stood shaking—not from exhaustion, but realization.
"…I did it," she whispered.
Alone.
---
Shinobu — Poison and Precision
Her mission took her to a forest thick with rot.
The demon was cunning. It ran. Hid. Mocked.
Shinobu adjusted calmly, changing toxins mid-fight, her expression unreadable.
"You're slower than the reports," the demon hissed.
She smiled sweetly. "You're more predictable than you think."
One misstep.
One precise stab.
As the demon convulsed, Shinobu exhaled slowly.
No one to correct me. No one to back me up.
She didn't need them.
But—she admitted quietly to herself—
She missed them.
---
Kanae — Quiet Mercy
Kanae's assignment was strange.
A demon that didn't attack immediately. One that wept.
She listened.
She always did.
When it finally lunged, desperate and broken, she ended it swiftly—cleanly—without hatred.
Afterward, she prayed.
Not for the demon.
For the people who would never know how close they'd come.
We're all walking forward, she thought. Even when we're apart.
---
Kai — Alone, as Intended
Kai completed mission after mission with mechanical efficiency.
Mountain paths. Abandoned temples. Blood-scented wind.
Demons fell quickly.
Too quickly.
By the third month, the crows stopped issuing warnings in their tone. They simply reported facts.
Then—
One night, the air changed.
The demon stepped out of the shadows without fear.
Its presence bent the forest slightly inward, like the world was holding its breath.
Kai stopped walking.
"…Lower Moon," he said calmly.
The demon smiled wide. "Ah. You see me."
Lower Moon Four.
It moved first.
Fast. Strong. Blood Demon Art flaring like warped reflections in the air—mirrors of distorted reality.
Kai exhaled.
Sun Breathing ignited—not violently, but completely.
The demon attacked.
Kai stepped through it.
One strike.
The forest stilled.
The demon's head hit the ground before its body realized it was dead.
Silence followed.
Kai stood unmoving, blade steaming faintly.
"…Too weak," he murmured—not in disappointment, but confirmation.
The gap was clear now.
He cleaned his blade, sheathed it, and walked on.
Somewhere far away, three girls felt something—like the sun passing overhead.
---
Reunion — Months Later
They met again by chance—or fate—at a Wisteria House.
Mitsuri was first to spot him.
"KAI!"
She crashed into him at full speed.
Kanae laughed, relief bright in her eyes. Shinobu crossed her arms—but her shoulders relaxed.
"You're alive," Shinobu said dryly.
"So are you," Kai replied.
They sat together that night, exchanging stories quietly.
Victories. Mistakes. Fear admitted without shame.
No one bragged.
They didn't need to.
They could see it in each other.
Growth.
Distance hadn't weakened them.
It had proven them.
And when they walked out together the next morning—
Four shadows on the road—
They were no longer children walking side by side.
They were Demon Slayers who had learned how to stand alone—
And still choose to return.
---