"Actually, injuries like the ones yesterday weren't really a big deal…"
After a long while—
Ren finally managed to escape from that magnificent "mountain range."
He took a deep breath, almost suffocated earlier.
Looking at Tsunade's beautiful face, he smiled.
"It was just a small accident. If it had happened in the wild, I would've recovered very quickly."
He wasn't an ordinary Logia-type ability user.
After the Mori Mori Fruit merged with his chakra, it had undergone an incredible mutation.
Yesterday's accident mainly happened because of a miscalculation.
After treating his injuries, his mind had been too exhausted from the intense battles.
He simply couldn't hold on and passed out.
After all, once the wood clones were released,
their experiences and memories returned to the original body along with the chakra.
This wasn't a bad thing.
On the contrary, it helped Ren review every detail of battle—every mistake.
Allowing him to reflect, improve, and grow stronger.
But the price was that the mental fatigue doubled due to the intense combat.
If it had happened in the wild,
he could have simply forced himself to catch a few beasts—or devour the vitality of nearby trees.
That would have allowed him to recover quickly.
"But if Tsunade-nee is around in the future, I can really go all out with my training!"
As a Mori Mori Fruit user,
his vitality was astonishing.
Under normal circumstances, it was extremely difficult for him to die.
"Everything needs moderation. If you rush too much, you'll only hurt yourself."
Tsunade knocked him lightly on the head.
Then she looked curiously at his crimson three-tomoe Sharingan.
"By the way… what exactly is the ability of your Mangekyō Sharingan?"
"Ōnamuchi. That's the space-time ability born from both my eyes."
As Ren spoke,
his eyes changed.
The pattern transformed into a dazzling Mangekyō design.
He then briefly explained his abilities to Tsunade and Shizune.
To demonstrate—
He suddenly stepped forward.
In full view of their eyes,
his body passed straight through Tsunade.
And emerged from behind her.
"Incredible…"
"H-how terrifying…"
Even though they were mentally prepared,
Tsunade and Shizune still felt their scalps tingle.
They were secretly relieved that Ren wasn't their enemy.
Because they didn't possess ocular abilities like the Sharingan or Byakugan, nor did they have special sensory powers.
Against such a terrifying ability—
they would be completely helpless.
They might not even be able to escape.
"The power of the Mangekyō Sharingan really is astonishing…"
Tsunade sighed as she looked at Ren.
"No wonder Danzō has always coveted that power and wanted to eliminate the Uchiha."
She felt that if they actually fought,
she might truly be defeated by Ren instantly.
The ability Ōnamuchi was simply too unfair.
The strange parallel space called Netherworld—
Invisible, untouchable—
Yet undeniably real.
Ren could even attack from inside it with wood clones.
Attacks that couldn't be seen or sensed.
And if he remained inside it,
he could stand right in front of you—
allowing you to attack with everything you had—
yet you wouldn't be able to harm him at all.
"Anyone who becomes your enemy would be extremely unlucky."
Shizune said sincerely.
Her junior disciple was unbelievably strong.
She couldn't imagine how desperate an enemy would feel facing such a Mangekyō ability.
"Alright, enough about that."
Tsunade took a deep breath.
She had absorbed too much shocking information today.
Seeing that Ren was mostly fine, she said:
"After breakfast, we still need to go treat some patients."
"As for training, that can continue this afternoon."
She pointed at him.
"And you'd better not slack off."
"Hehe, I won't, Tsunade-nee!"
Time passed quickly.
In the blink of an eye, several days went by.
During the mornings,
Ren followed Tsunade to treat patients.
Under her guidance, he treated all kinds of strange illnesses among the nobles.
His experience grew rapidly.
In the afternoons,
he practiced the various ninjutsu and secret techniques he had taken from the Uchiha clan inside the Netherworld Space.
At night,
he sparred fiercely against his wood clones.
With Tsunade—the greatest medical ninja—as both healer and protector,
Ren had no fear of serious injuries.
He threw himself completely into brutal training.
Every time he emerged from the Netherworld space covered in blood,
Tsunade and Shizune—who had been waiting outside—
would immediately treat him.
Although less than a week had passed,
Ren's improvement was unbelievable.
Whether it was taijutsu or ninjutsu, his strength had risen dramatically.
Of course—
This also meant Tsunade had far less free time.
She constantly complained that she didn't even have time to visit the casino anymore.
"Thank you very much! You truly are a divine healer!"
Outside a grand mansion.
A group of people escorted Tsunade, Shizune, and Ren out.
A fat noble with a pale face bowed politely.
"Lady Tsunade, please accept this small token of appreciation."
Even though he normally looked down on ninja—
considering them nothing more than tools—
he didn't dare disrespect Tsunade.
After all,
she was not only the Princess of Konoha, personally recognized by the Fire Daimyō—
but also a legendary medical ninja.
Even the Daimyō himself couldn't guarantee he would never fall ill.
Someone like Tsunade—
was worth flattering.
"Then I'll accept it."
Tsunade nodded calmly.
Ren smiled.
Taking the payment on behalf of Shizune.
"Then we'll take our leave."
"Please take care!"
Back at the inn.
"Finally finished…"
Tsunade stretched lazily.
Her curves were breathtaking.
Even the pendant around her neck bounced slightly.
"Tsk tsk… that minister was really generous."
Opening the suitcase,
Shizune saw stacks of cash.
Her eyes curved into happy crescents.
The previous payments had all been used to repay debts.
Finally—
they could keep some money.
"Well, Tsunade-nee is a legendary medical master."
Ren shrugged.
"People don't get opportunities like this often. Of course they want to curry favor."
"Hehe, at least our efforts weren't wasted."
Shizune happily closed the suitcase.
Then she looked at Tsunade.
"Lady Tsunade, are we leaving now?"
"Yes. There's no reason to stay here anymore."
Tsunade nodded.
A cold smile appeared on her face.
She looked directly at Ren.
"Those people should be running out of patience by now, right?"
Over the past few days,
someone had been secretly watching them.
But under Ren's powerful sensory abilities—
they had been completely exposed.
"Yeah. Those Root guys have been tailing us like stubborn parasites for days."
Ren shrugged.
"They're probably here for me."
"As soon as we leave the city, they'll most likely make their move."
His eyes narrowed as he smiled.
"Oh, and I sensed Danzō's chakra earlier."
"Looks like he just arrived."
Ren could roughly guess Danzō's plan.
Most likely—
after seeing Ren's terrifying talent,
he intended to use Shisui's Mangekyō ability, Kotoamatsukami, to forcibly rewrite his will.
Turning Ren into his subordinate.
"Danzō…"
Tsunade clenched her fists.
Cold killing intent flashed in her eyes.
"This time, Ren—you don't need to hold back."
Tsunade was never a saint.
And she had long despised that schemer Danzō.
After the Second Hokage died,
Hiruzen Sarutobi became Hokage.
Danzō became the Hokage's advisor.
Together with Homura Mitokado and Koharu Utatane, they formed Konoha's ruling council.
And soon after—
they began suppressing the Senju clan.
From the end of the First Great Ninja War to the Second—
within barely a dozen years,
many Senju elites died on the battlefield.
Danzō was undoubtedly involved.
And now—
he dared target her disciple.
This time,
she wouldn't let it go.
"Perfect."
Ren licked his lips and smiled.
"I can use them to test my strength."
After all,
someone who wanted to become truly powerful
couldn't rely on training alone.
Real combat—
was the best way to prove one's strength.
…
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