Weeks turned into months.
Ren and the others were now 7 years old, in second year of the Ninja Academy. On the surface, nothing had changed—same classrooms, same lectures, same sparring matches.
But beneath that normalcy, something extraordinary had reached completion.
---
Ren burst into laughter alone in the sealing chamber.
"It's finally done."
The scroll before him shimmered faintly, layered arrays stabilizing into perfect symmetry. Yin, Yang, and Natural Energy matrices rotated in balanced harmony.
For the first time since conceiving the idea, he felt no instability in the formula.
It worked.
---
The next day, when the girls arrived at his house for training, Ren didn't even greet them properly.
He pulled all three into a sudden hug.
"The seal worked!"
Ino blinked. "What?"
Sakura nearly stumbled. "Ren, breathe!"
Hinata's eyes widened. "It… succeeded?"
---
Behind them, Shizune covered her mouth in surprise.
Tsunade folded her arms, though the small smile on her face betrayed her pride.
"You actually stabilized it," Tsunade muttered.
Ren stepped back, forcing himself to calm down.
"Okay. Listen carefully."
---
"The version Tsunade-nee is using right now only circulates senjutsu chakra," Ren explained. "It allows her to stay in a pseudo–Sage Mode continuously."
Tsunade nodded slightly.
"It's stable. Efficient. And my recovery has accelerated."
Ren's eyes gleamed.
"But this new one is different."
---
"It separates Yin and Yang chakra and circulates them alongside senjutsu chakra."
The girls leaned closer instinctively.
"With Yang," Ren continued, "your body will gain extreme vitality, larger chakra reserves, and faster regeneration. Over time, it will evolve your body into a Sage Body."
Sakura inhaled sharply.
"Evolve?"
---
"And Yin," Ren added, "will balance both Yang and senjutsu chakra. It prevents overload and stabilizes mental clarity."
He turned toward Hinata.
"And for you, Hina… it will nourish your Byakugan. Gradually refine it."
Hinata's fingers trembled slightly.
"Refine… my eyes?"
---
Ino stared at him.
"You're serious."
Ren met her gaze.
"I wouldn't joke about this."
Sakura looked between Tsunade and Ren.
"Is it safe?"
---
Tsunade stepped forward.
"We tested the prototype thoroughly. I've been using a limited version for weeks."
Shizune nodded.
"It's stable."
Ren smiled faintly.
"It's time."
---
He had already prepared the sealing chamber in the Senju house.
Intricate arrays covered the walls and floor, layered with reinforcement barriers and chakra dampening grids. The environment ensured perfect application without interference.
Ren paused at the doorway.
"Well… you'll need privacy."
Ino's eyebrow rose. "Obviously."
Ren turned around immediately.
"I'll wait outside."
---
Tsunade activated the chamber.
One by one, the girls received the seal.
Yin, Yang, and Nature interwoven into an eclipse-shaped mark placed at the center of their foreheads.
The process was painless.
But heavy.
---
When they emerged fully dressed, Ren looked up.
On each of their foreheads rested a faint eclipse symbol—black and white interlocked around a subtle green core.
It represented Yin, Yang, and Natural Energy unified.
The mark shimmered briefly before fading invisible.
---
"You can keep it hidden," Ren explained calmly. "The seal will constantly drain a small amount of chakra from you. Once it fills, it will begin generating senjutsu chakra and Yin-Yang chakra, slowly integrating them into your body."
Ino touched her forehead.
"It feels… warm."
Sakura closed her eyes briefly.
"I can sense something circulating."
Hinata activated her Byakugan instinctively.
The chakra flow inside her coils looked different.
More balanced.
More alive.
---
Tsunade smirked.
Her own seal was already active.
She had massive chakra reserves stored from years of accumulation. The moment the modified seal engaged, her body reacted strongly.
Her cells were greedily absorbing Yang chakra.
Healing.
Replenishing.
Reversing damage.
---
"In a few weeks," Tsunade said quietly, "my cells will return to normal function."
She paused.
"They might even start de-aging."
She laughed softly.
"If Orochimaru found out, he might die from jealousy."
---
Ren snorted faintly.
"He threw everything away just to create a jutsu that grants him unstable immortality."
He shook his head.
"This seal doesn't make us immortal. But it will extend our lifespan. And it keeps our bodies in their physical prime."
Tsunade glanced at him sideways.
"And if we awaken Sage Bodies fully?"
Ren's voice lowered slightly.
"Then you'll live far longer than most."
---
The girls exchanged looks.
Ino grinned. "So we stay young and strong forever?"
"Not forever," Ren corrected. "But long enough."
Sakura folded her arms thoughtfully.
"This changes medical science entirely."
Hinata looked at her hands quietly.
"I'll become strong enough… to protect everyone."
Ren smiled at her.
"You already are."
---
A few weeks passed.
The changes became noticeable.
Muscle density increased subtly. Recovery time shortened dramatically. Chakra capacity expanded gradually but steadily.
They entered a visible growth spurt.
Height increased.
Features sharpened.
Their presence deepened.
---
Because their power was growing rapidly, training inside the village became dangerous.
So Ren had prepared something long ago.
A hidden house near the seaside.
---
The location was isolated.
Three sides surrounded by dense forest.
The fourth side opened to the ocean.
A small beach stretched across white sand, waves crashing rhythmically against the shore.
---
The house had been built by Ren's shadow clones months ago.
Sealing barriers layered the entire perimeter. Genjutsu concealment distorted the landscape from the outside.
Unless someone was a Kage-level sensor or higher, they would never find it.
Even if they did, entering was another matter entirely.
---
Ren, the girls, Tsunade, and Shizune trained there regularly.
With the new seal accelerating their growth, normal sparring inside Konoha would cause unnecessary attention.
Here, they could go all out.
No witnesses.
No limits.
---
Wind tore through trees during Ino's advanced wind techniques.
Lightning split the air when Hinata unleashed enhanced strikes.
Sakura shattered boulders effortlessly.
Ren matched all of them calmly.
And Tsunade watched with satisfied eyes.
---
The sound of waves mixed with explosions.
Sand turned to glass from lightning.
Forests regrew rapidly under Tsunade's guidance.
They trained.
They sparred.
They evolved.
---
Days turned into weeks.
Weeks into months.
And back at the Academy, something else happened.
---
Sasuke noticed.
Ren's aura had changed.
Hinata's presence felt sharper.
Even Ino and Sakura radiated confidence.
It irritated him.
So he trained harder.
---
Naruto saw Sasuke training harder.
So Naruto trained harder.
Shikamaru complained—but quietly practiced longer.
Choji improved stamina.
Kiba pushed himself further.
The effect spread.
---
A chain reaction.
The quiet monsters of the Academy were pulling everyone upward.
Without even trying.
And Ren watched it all unfold calmly.
The eclipse marks hidden beneath skin.
The ocean wind at his back.
The future slowly bending toward something greater.