At fifteen, Hajime was no longer a boy hidden in the woods. He had shoulders now, lean and shaped by thousands of hours of labor. His chakra coils were thickened from strain, and his breath, once shaky after simple exercises, now steadied even after extended training. He had moved from simply surviving to shaping his life, stone by stone, jutsu by jutsu.
The small house he'd bought on the village's edge was modest but enough for appearances. He still took commissions, writing letters, crafting scrolls, ghostwriting folk tales for traveling storytellers, but most of that money vanished into one thing: food. He needed meat now, kilograms of it daily. His body burned through calories like a forge, and still it felt barely enough to fuel the monstrous appetite of his growing chakra.
Each morning before sunrise, he left through the misty outskirts, passing silent trees and fishermen's homes until he reached the old poplar tree in the forest. The grass around it was undisturbed, not a single footprint visible. Kneeling with practiced calm, Hajime placed both palms on the ground.
"Earth Release: Subterranean Den Formation."
The soil responded like breath through lungs, parting, folding inward. A wide circular slab of earth retracted into the ground, revealing a staircase descending into darkness. As he stepped through, the slab sealed behind him with a soft hum, leaving only the rustling of leaves and the wind's passing sigh.
The base had changed. It no longer felt like a hideout, it was a fortress.
Reinforced pillars carved from chakra-hardened stone lined the ceiling, bracing the many tunnels and rooms. One chamber glowed faintly with embedded lamps fed by fire chakra channels. Ventilation shafts allowed fresh air from above to circulate. A filtered well offered clean water, deep and pure. The place was vast, and every inch of it had been shaped by his hands.
His gym chamber stood to the left, a shrine to discipline. Dumbbells forged from compressed stone rested in neat rows, small in size but dense and heavy from layered chakra compression. Weighted clubs stood beside them, carved from basalt and embedded with subtle chakra threads to prevent crumbling. In the far corner, a bar suspended between two pillars served as a pull-up station, with chakra-enhanced ankle weights stacked nearby. A run pit filled with packed gravel gave resistance for sprint training. Everything was hardened, functional, unforgiving.
He walked through the space slowly, letting the silence remind him what he had built.
But even with all of this, strength, tools, space, he had run into a new kind of wall.
There was nothing more to learn here.
The Land of Waves held no shinobi clans, no advanced scrolls, no jounin to spar or guides to study under. He had pushed past what the villagers could teach, and even the books from traveling merchants had begun to repeat each other in shallow, colorful tales. He needed to move forward, and so, he turned inward.
From the corner of his mind, a memory surfaced. Not from this world, but from the old one.
Naruto. Jiraiya. The Rasengan training.
If he remembered it right, the process had three stages.
Rotation. Force. Containment.
He went to the training chamber and set down a water pouch.
"Let's see if memory is enough."
With a steady exhale, he gathered chakra to his palm and pressed it into the pouch. The water rippled faintly. Nothing burst. He frowned, adjusted the flow, then spun it faster. The water sloshed to the left, then the right, then upward in a twisting cyclone, pop.
The pouch exploded in his hand, drenching his arm.
"One step."
He repeated the process, again and again. Failure after failure. Sometimes the pouch split too early. Sometimes the spin was uneven. But by evening, he could burst a water pouch consistently, sending water in every direction. It wasn't much, but it was proof that the rotation could be mastered.
Stage two required pressure. He bought a new rubber-like ball from traveling merchants. He held it in his palm, and began to pour chakra in, spinning and pushing. Unlike the water pouch, this one fought back. His chakra pushed, and the rubber resisted. The balance was delicate: too much pressure, and the ball slipped; too little, and it remained solid.
He screamed in frustration once when it backfired and jolted his arm. But he kept going.
Eventually, the sphere swelled, cracked, and burst, not violently, but from internal strain. The ball ruptured, and his palm ached. He grinned through the sting.
He was close.
The final stage was the hardest: making the chakra spin, apply pressure, and hold its form, with no container.
It was like trying to hold a cyclone in the shape of a teacup.
Days turned to weeks. In the chamber's silence, Hajime focused, hands trembling, sweat soaking through his training wraps. He learned to control the chakra flow down to the smallest strand, spinning it evenly across a spherical matrix. Sometimes it collapsed. Sometimes it spun out like a whip. But slowly, agonizingly, he found the balance.
And then, one night, it happened.
The chakra didn't twist or shred. It stayed.
A bright, swirling sphere hovered in his hand, humming like a distant thunderstorm, rotating furiously in all directions, but contained, compressed into a form of dense, humming chakra.
His eyes widened.
"It's real," he whispered. "I made it."
He held it longer this time, letting its warmth fill the chamber. The Rasengan. No scrolls. No mentor. Just memory, chakra, and will.
He released the jutsu and exhaled, hand aching.
Looking around at the cracked walls, stone weights, and earth-forged chambers, he felt something stir in his chest. Not pride. Not satisfaction. Just… readiness.
He walked toward the main stair, barefoot on cold stone, sweat cooling against his back. As he climbed, the torchlight from below flickered, casting his shadow tall against the wall.