Actually, after separating Kaguya's final soul fragment from his body, the Baku Baku no Mi within Naruto truly began to fully digest the bloodline power belonging to the Otsutsuki Clan.
It was from that moment that Naruto gradually became aware of the power within him rapidly expanding.
During the few months that Karin and Sasuke had been at sea, the total amount of energy within his body had increased by at least one-third.
Although that might sound ordinary, considering his already terrifying energy reserves, this one-third actually equaled the accumulation he had built up over more than twenty years in the One Piece World.
Put another way, the naturally increased energy from just these few days, taken alone, could create other Tailed Beasts.
And what was even more terrifying was that this growth showed no signs of stopping.
This had even caused Naruto himself to feel a certain amount of fear at one point.
Becoming stronger was a desire etched into the instincts of living beings. But becoming stronger endlessly, without reason, and even uncontrollably… that wasn't necessarily a good thing.
—At the very least, just to control the physique that was strengthening in sync with his energy growth, Naruto had put in considerable effort.
When Hancock kicked him with her Perfume Femur, he had to weaken his body as much as possible to actually get injured.
Otherwise, if Hancock kicked him, Naruto would probably be fine, but her own foot would get hurt first.
The Pure Gold energy was quickly extracted from Karin's body and forcibly compressed by Naruto in his hand into a small, solid-looking sphere of light.
"I really wonder where you got something like this."
Bringing the compressed [Super-solid Pure Gold] up for observation, Naruto looked at Karin, who was already beginning to revert from her beast-man form back to human, then at the Pure Gold still emitting a dazzling golden light, and shook his head.
He could sense that although most of the material making up this golden sphere originated from this planet, it also contained some energy that did not belong here, from the depths of space.
It was under the influence of that energy that the golden sphere spontaneously flowed toward Karin.
Even now, if Naruto hadn't isolated it by wrapping it in Chakra, it would immediately merge back into Karin's body.
Putting the golden sphere away, Naruto planned to ask Karin for her opinion once she awoke.
Additionally, the seal on Karin's arm had been reinforced.
Starting from the Kama, blue wave-like ribbon patterns spread toward her forearm and upper arm, looking somewhat like tattoos depicting ocean worship.
But in reality, each of these patterns contained a vast amount of Senjutsu Chakra.
This Senjutsu Chakra, created from the Natural Energy of this world, combined with Naruto's research into Otsutsuki power, resulted in the creation of this seal.
It was a seal on the Kama itself.
As an unofficial member of the Otsutsuki Clan, Naruto actually also possessed the ability to create Kama.
During the time he spent controlling his energy growth, he had also begun studying Kama to reverse engineer a sealing technique capable of counteracting its mechanisms.
"Hmm... maybe I should call it 'Mortise'?"
If the original meaning of Kama was a wedge driven between supports, then [Mortise] was the groove used to fix the wedge in place, preventing it from moving.
"Ugh... forget it, let's not think about that."
Naruto had originally intended to name this technique [Mortise Seal], but then he thought of the [Goddess of the Mortise], Otsutsuki Kaguya, whom he had just killed, and ultimately abandoned the idea.
As for technique names... well, there was no one around here anyway. When someone did show up, he could just shout something random.
Wasn't that how all the strong people on the seas did it?
Otherwise, did you think they actually trained specifically to develop new moves in their daily lives? They all made them up on the fly during battle.
"...If only there were a Naming-Naming Fruit..."
Naruto muttered quietly while supporting Karin as he returned to the sea surface. Then, he extended his palm downward.
In an instant, the gravitational force of the Rinnegan activated.
...
Below, inside the submarine.
Just as everyone was recovering their composure from the panic caused by the mechanical alarm, the crimson high-energy warning on the display screen flashed again.
"Uwaaah! What in the world is happening up there?!"
Naomi clutched her head with both hands, letting out a despairing scream.
Even Kalifa and Stussy's expressions were less than pleasant at this moment.
Only Medusa, holding Adam, remained completely calm and composed, seemingly unconcerned about the impending crisis of destruction.
She very calmly continued operating the escape pod device.
Everything, everything, was to ensure Adam continued to survive.
However, just as Medusa was calmly preparing the escape measures, a sound seemed to reach her ears, causing her actions to abruptly stop.
Stussy beside her noticed this and turned to look at Medusa, who appeared to be listening to something.
"What's wrong?"
After listening for a moment, Medusa looked up and replied to Stussy.
"Stussy-sama, Adam-sama says not to worry, and to take no action."
Having said this, Medusa truly did as she was told, abandoning the operation and walking back over, carrying Adam, who had somehow awakened.
"Who's talking? Adam? But... isn't Adam this woman's child?"
Naomi's eyes clearly conveyed the thought, 'These people have gone crazy'. She gently tugged at Kalifa's sleeve with one hand.
"Kalifa, have them open the hatch. I'll take you out directly. I can survive underwater, I can take you—"
"No, stay here."
Kalifa raised her hand to stop Naomi from continuing.
She looked seriously at Stussy, who had taken the child from Medusa, and asked her earnestly.
"She... no, your child... is what he says trustworthy?"
The reason for this doubt was that she had personally experienced little Adam's incredible power.
And now that child, who looked so much like the Empress, was also saying this. It was hard not to believe.
After all, in this sea where all sorts of incredible things happened, anything was possible.
—And ultimately, they didn't have the ability to resist anyway.
The highest combat power on this submarine at the moment was that little girl named Medusa.
Without Stussy even lifting a finger, Medusa alone could take them both on and still have plenty to spare.
"I don't know, but I believe in my child."
Stussy gently shook her head, then pressed her face against Adam's little cheek, feeling her child's warmth.
She truly believed in Adam.
This child who, from the moment of his birth, had brought about all kinds of incredible miracles.
Rumble!
The entire submarine suddenly shook, as if grasped by a giant hand.
Then, the submarine carrying them was forcibly 'pulled' up from the sea.
Through the modified periscope, everyone could clearly see the man hovering above the sea surface.
"Captain!"
Naomi was the first to spot Karin, floating unconscious beside Naruto, and couldn't help but let out a cry of surprise.
And Kalifa immediately recognized Naruto as the terrifying man who had nearly annihilated them all back in Water 7.
Of course, someone was even faster than her.
Holding her child, Stussy erupted with the speed of a Zoan-type user plus a CP0 agent, disappearing before everyone's eyes like the wind.
It was only at this moment that Kalifa confirmed that even without Medusa, Stussy alone was more than enough to handle the two of them.
'Wait!'
'Did that mean Stussy's husband, Adam's father, was this man!?'
Kalifa's previously calm expression instantly turned to shock. Her facial expression broke all records… mouth wide open, eyes practically bulging out.
Come to think of it, back when they were still affiliated with CP9, they had encountered Naruto once and were nearly annihilated. Immediately after, Stussy appeared and took over their command.
Later, Stussy even led them all to Whole Cake Island, where Naruto was.
'So they had been involved with each other all along!?'
'And they even had a child!'
Kalifa couldn't believe it, but her disbelief was dispelled upon seeing the scene of Stussy, flapping her bat wings, fly into Naruto's arms.
'So we CP agents were just part of the fun between you two lovebirds?'