"We really enter the sea..." Carina was dumbfounded, but Robin said, "Didn't you see his experiment?"
"I did, but I am still surprised, okay? Aren't you surprised too, Robin?"
"Well, I am."
"...." Carina.
As the two were on the dock of their yacht with Shinra, who managed the ship on his own and didn't leave it in automatic mode, considering the danger and their safety, they couldn't help but marvel at the scenery of the bottom of the ocean that was filled with a variety of fishes from small to huge, corals, and many others that couldn't be explained as the deep ocean was filled with mystery.
"Shinra, don't forget to use your Iro Iro no Mi!"
While the scenery was beautiful, it also made Carina nervous, and it was safer if they used Shinra's Iro Iro no Mi to turn their ship invisible, right?
"I have done it. Don't worry."
"Then, again, how do you think the Fish-Man Island was created, Shinra?"
"I don't know."
Shinra didn't know how to answer Robin's question. "Maybe in the past, technology was so advanced, and this Fish-Man Island was part of that long-lost technology."
"...." 2x
Shinra's explanation... they felt like it contained a lot of the truth.
While Carina was unfamiliar with many things, as she came to know Robin's identity, she also gained insight into what Robin and Shinra were trying to understand.
Void History.
The past history that was erased 800 years ago by the World Government.
What had happened back then?
Yet, no matter what, the level of technology at that time was definitely far higher than the current timeline.
An island that could exist 10,000 meters below the water surface, if one told them that it was naturally created instead of man-made, no one would believe.
"Still, it is meaningless to think about all of that. My brain might be smart, but I am not smart enough to think about how to make an island able to live underwater for centuries or more."
"...well, that's true."
"Let's stop thinking and focus on the sailing."
Carina and Robin agreed that with their brains, trying to understand technology was like trying to reach the moon by only using stones, which they arranged into a tower.
In other words, it was impossible.
More importantly, instead of trying to learn those technologies, it was better to learn how to grow stronger, at least at his current level of power.
"So, do you understand Haki, Shinra?"
As they were close to Shinra before, when he was taught by Rayleigh, they also came to understand the existence of Haki, a supernatural power that could enhance their strength.
"I understand."
Shinra wasn't lying since he had to say that Haki was similar to chakra to a certain extent, but instead, more or less, chakra had a deeper application, whereas Haki focused mostly on physical improvement.
Yet, this was normal since the style of fighting between ninjas and people of this world was different.
If ninjas fought in a dirty way and used ninjutsu, then the people of this world relied on their physical ability, so naturally, the way they improved their special abilities was different.
People might say that Shinra was strange to say that chakra and haki were similar, but in the world of Naruto, a type of ninja known as a Sensory Type, which made them able to detect others' existence, which was more or less similar to the Observation Haki.
At the same time, one's chakra could be used to strengthen one's physical ability, like how the Armament Haki was. If there was a difference, it would only be the colour.
As for the Supreme King Haki, since ninjas were known as workers to manage Daimyo or the Lord's ruler over their subjects instead of a king of people, wasn't it natural for them not to awaken it?
If somehow the ninjas changed their perception of the daimyo, thinking that this lord of people wasn't as amazing as they had thought, and became the king of their own, Shinra was sure that the Supreme King Haki would be awakened.
While some might argue otherwise, the fact that Haki could create lightning-like elements, and even fire, showed that it was quite similar to ninjutsu, as its focus was on creating those elements, such as fire, wind, lightning, and others, as a method of fighting.
Still, while they were somewhat similar, they were different since their focus was different.
While the ninja tried to create stronger ninjutsu, the people of this world improved their physical ability.
As for who was stronger, it didn't really matter since to become stronger, Shinra would do anything, including learning Haki.
Still, what he had to do was to sharpen and hone the basics of the Armament Haki, Observation Haki, and the Supreme King Haki.
Yes, he might be talented due to the talent of the Uchiha, which made him able to learn fighting style in almost near-perfection, but of course, he had to train himself.
Regardless, while he worked hard, he also didn't forget to relax, and Robin tenderly helped him with several hands, and sometimes legs that she used in a way that made him go into a daze, completely stupefied.
As for Carina, she was all numb and just curled softly on her bed, hiding under the blanket, trying to cover her ears from Robin's sweet cry that was so lewd, yet attractive.
Robin, the one who was cold, and always showed her elegance and grace, was ruined into a whore by Shinra, yet Carina became even curious, so she walked silently toward their room and lightly opened the door until a small gap was opened, and she saw what the two were doing as her breathing grew harder and subconsciously her hand reached toward her nether region as the flooring on the ship grew wetter and made a small pond due to her love juice.
Yet, as they grew deeper, Shinra also knew that he had to take the sailing seriously.
Still, facing his figure, who was serious about his work, Carina was in a daze, staring at him from a distance, while wondering whether she was so unattractive in his eyes that he never thought to do anything to her.
"What's wrong?"
Robin, who rubbed her shoulder helplessly, noticed Carina's gaze and smiled meaningfully.
"...don't tease me, okay?"
"I am not teasing you. You are the one who is naughty."
"....." Carina.
"But you are right. He is too strong. I need your help."
When Robin thought that Shinra would grow even stronger, especially after he gained the Batto Batto no Mi, Model: Vampire, she felt that it should be okay for him to get a new lover. It was a little tough to handle him alone, after all.
"....." Carina.
"Oh, we're about to arrive."
"Hm?"
As the world grew darker and nothing could be seen except for some large eyes that seemingly glanced in their direction, Robin and Carina moved closer to Shinra since they realized how insignificant they were, especially when they saw many ocean creatures whose size reached hundreds of meters or even kilometers resided at the bottom of the sea.
"Oh, there are many undersea volcanoes here."
"Are you going to erupt and destroy our ship?"
"Stop saying something scary, Robin!"
While Robin and Carina had their comedic duo, Shinra thought that those volcanoes could become an energy source for many things.
'Unfortunately...'
It was too small and its land was too small, too.
It was so tiny, like those islands in Hawaii, which made him sigh inwardly.
More importantly, freshwater did not exist in those areas, which made it difficult for him to develop them unless he was willing to invest a significant amount of money. Yet, when he considered the fact that the ocean's level continued to rise and he lacked a group of smart people to help him with his ambition, he sighed helplessly.
Still, he could think of that problem later, since as they passed the darkness with only boiling lava as the light, they finally reached the bottom of the ocean, 10,000 meters below the surface.
"This is the Fish-Man Island?"
While Robin and Carina were in a daze as they watched the unbelievable scenery before them, Shinra didn't let his guard down and continued to check the surroundings until he was sure that everything was okay till he saw a shining metallic item move toward the island.
"What is that?"
"Did you see something? Is it a treasure?"
"It might be?"
Regardless, as the three entered the Fish-Man Island, without a doubt, all the eyes were on them.