Naruto: You Call This A Medical Ninja?

As Naruto was sent flying, Sasuke quickly distanced himself from Reiki. He knew that facing their teacher head-on in this state was hopeless.

But before he could even steady himself, a ghostly voice whispered in his ear:

"The instinct is good, but your speed is still too slow!"

Boom!

In the blink of an eye, Reiki's foot slammed into Sasuke, sending him hurtling like a meteor into the dust cloud where Naruto had landed.

Reiki didn't immediately pursue them. This was, after all, a test—a lesson, not a life-or-death battle.

Still, the teacher's duty was to teach them a real lesson, and a little extra pressure wouldn't hurt.

Moments later, the dust cloud erupted as a powerful aura swept through the area.

The impact blew away the lingering haze, revealing Naruto and Sasuke standing tall.

Naruto had entered Heavy Ion Mode, his body glowing with an intense golden aura. Beside him, Sasuke's Susanoo had transformed into a sleeker, more compact form, resembling battle armor. The chakra coating his body exuded an impenetrable defense.

Reiki studied them with intrigue.

"Switching to Heavy Ion Mode instead of relying on the Nine-Tails? Clever," he murmured.

Naruto smirked confidently. "Don't worry, teacher. This is just a fraction of what Kurama and I can do."

"And don't hold back," Sasuke added. "We're giving it everything we've got."

Reiki raised an eyebrow. "Alright then. Let's see if you can push me this time."

Sasuke responded first, raising a hand.

"ROOM!"

The battlefield shimmered as Sasuke activated his spatial ability. At the same time, Naruto prepared a direct assault.

"Heavenly Hand Power!"

The two boys coordinated seamlessly, attempting to disorient Reiki with a combination of teleportation and high-speed attacks.

Reiki countered effortlessly.

When Sasuke tried to swap their positions, Reiki neutralized the effect by deploying his own space-altering abilities.

"Void-Cleaving Blade!"

With a single swing of his sword, Reiki tore through the space around Sasuke, forcing him to retreat.

Naruto, meanwhile, moved at blinding speed, nearly teleporting as he closed the distance.

Boom!

Naruto's fist collided with Reiki's, their sheer power sending shockwaves across the battlefield.

But even with his speed and strength amplified by Heavy Ion Mode, Naruto couldn't land a decisive blow. Reiki's technique was flawless, his movements too fluid and precise to allow any openings.

"Not bad," Reiki admitted. "But if this is all you've got, it won't be enough."

In the background, Sasuke prepared his ultimate move. A longbow appeared in his Susanoo's hand, and a black flame arrow—imbued with Amaterasu—materialized on the string.

Naruto sensed Sasuke's intention and ramped up his attack, attempting to hold Reiki's attention.

"Teacher, we're not done yet!" Naruto shouted, charging up a massive Senjutsu: Tailed Beast Rasenshuriken with Kurama's help.

Reiki smiled. "Not bad. But now, it's my turn."

With a wave of his hand, he summoned his companions—Gujia, Orr, Chodori, and Dark Night—into the battlefield.

"You four handle Sasuke," he commanded. "I'll take care of Naruto."

Merging with his Moon-Gazer summon, Reiki entered his own enhanced mode. A powerful aura enveloped him, making him even faster and stronger than before.

Naruto barely had time to react before Reiki's attack landed.

Boom!

Naruto was driven into the ground with relentless precision, each of Reiki's strikes exploiting his openings. Despite Naruto's best efforts, the teacher's overwhelming skill and power rendered him helpless.

In just two minutes, Reiki forced Naruto's Heavy Ion Mode to dissipate entirely.

"Teacher, I—" Naruto began, but before he could surrender, Reiki's fist silenced him.

The ensuing minutes were a one-sided beatdown, leaving Naruto bruised and battered.

Meanwhile, Sasuke fared no better.

Facing the four summons, he was quickly overwhelmed. His Susanoo, once a symbol of invincibility, crumbled under their relentless assault.

"Impossible..." Sasuke muttered, his pride shattered as his strongest defense failed.

Ten minutes later, both boys lay on the ground, their faces swollen and their bodies aching.

Their expressions, hidden behind layers of bruises, hinted at their discontent. The faint tears welling in the corners of their eyes betrayed their frustration.

Reiki approached them, his tone lighthearted. "All right, enough for today."

Placing his hands over them, he activated his Holy Hand Domain, rapidly healing their injuries.

As their pain subsided, Sasuke spoke, his voice tinged with despair. "Teacher... why are you so strong, even at this point in time? Will we ever catch up to you?"

Reiki chuckled. "Catch up to me? Hmm... not likely. Right now, I can handle an Ōtsutsuki on my own. You two working together might be able to hold your own... but in front of me, you're still kids."

Sasuke groaned, his pride taking yet another hit. "Even in the future, we're nothing compared to you..."

Naruto crossed his arms, pouting. "Teacher, we want to go back. At least our teacher in the future doesn't beat us up like this!"

Reiki laughed heartily. "Alright, alright. Since you came all this way, let me give you something to take back with you."

He reached into his pocket and retrieved two boxes, handing one to each boy.

"This is the Dragon Essence Potion. It should work well with your abilities, especially since you seem to have inherited the Sage powers of your own world. Use it wisely."

Naruto and Sasuke stared at the boxes, their earlier frustration melting into gratitude.

"Thank you, teacher," they said in unison, their spirits lifted despite the beating they had endured.