The Red Line's calm sea inspired the three Fish-men to start exploring the depths, while Tsuyu curious as always, accompanied them as they followed the rocky path towards the bottom.

The former captain of the Sun Pirates was the first to descend, making sure the unknown sea was safe, for then, being followed by the two Fish-men escorting the heroine as she examined the enormous staggered holes that resembled underwater tunnels on the ancient red continent.

The pressure started to hurt Froppy's eardrums, so the two Fish-men gave her advice on how to avoid that issue and descend further without harming her body. She managed to follow them both at a good speed to prevent producing bubbles in her blood, but the pressure in her chest eventually forced her to desist from descending further; being the saw-nosed Fish-man who accompanied her to the surface while Tuna continued his way to the depths catching up with Jinbei.

Heroes and pirates watched in awe the massive crimson wall remaining's… What used to be the linear Continent that divided the world into two, now lay in ruins scarred by what appeared to be holes inflicted by enormous fists.

"DID A GIANT DO THAT?!" Kirishima asked excitedly.

"No... Those fists marks are bigger... Even bigger than Oars'." Usopp answered, slightly tilting his head as he analyzed the holes on the great stone remains.

"Something bigger than a giant?" Mina curiously joined her classmate.

"Oars?"

"Usopp san! Have you met giants?" The Red-haired boy asked enthusiastically.

"Meet them? They've invited me to their kingdom." He pointed at himself with an arrogant smile.

"INCREDIBLE!" The eyes of the heroic pair shone like stars.

"How big are they?!"

"They're about twenty meters tall."

"WOW! I'd love to meet a gigant. They must be so manly!"

"They are warriors with a great sense of honor and pride." The young heroes could not contain their emotion in check, as Kirishima kept shedding tears, while Mina let out a high-pitched shriek.

"Oars is the biggest we've ever come across... I estimate about what? Sixty-seven meters?" Said Franky calculating while rubbing his chin.

"Did you calculated it, by just looking at it?"

"No, I'm just counting the number of stairs I built to attack it... Right chopper?"

"Yes! About sixty meters"

"WHAT KIND OF DUMB FIGHTING STYLE IS THAT?!" Bakugo spat water as he managed to overhear the conversation.

"Those holes could have been caused by a giant." Said the enigmatic archaeologist.

"What are you saying, Robin? They are not that big..." Said Franky.

"St. John Wolf, it's almost two hundred meters long!"

"WHEEEEEE?!" Chopper's antlers among his cap detached from his body caused by the shock.

"Blackbeard's pirates," Murmured Usopp

"THAT DAMN BASTARD!"

"Luffy?!" The heroes saw how the captain got upset after hearing the name of the pirate crew.

"Easy Luffy-san, it doesn't guarantee it was them; it just means there could have been another monster of his size in all those years." Brook attempted to soothe him.

The tranquil seas began to reveal a couple silhouettes from the depths, being Froppy and Mäkelä, who emerged returning to the ship.

"Tsuyu! What do you find?"

"It appears to be burrows in the wall, but other than that-Kero, there are no more traces."

"What about the sports model Gyojin?" Denki inquired as he observed that the tuna ex-convict had yet to return.

"He will try to go down further." The saw Fish-man answered as Tuna came to the surface.

"I was afraid I wouldn't make it back to the surface..." He said while catching a breath "Boss Jinbei, on the other hand, appears to be making the entire journey."

"That's a full-blooded Gyojin for you!" Mäkelä enthusiastically cheered.

"We need a submarine." The sexy heroine expressed her disappointment at not being able to discover what lurked in the depths.

"We could go further down if we only had someone who could coat the ship." Franky expressed his dismay.

"Coat?"

"It's a special coating made from a unique resin, that allows us to sail underwater."

"THAT'S BULLSHIT!" Bakugo shouted at the distance as he had his social battery at max.

"Will Mr. Jinbei be all right?" Midnight asked worriedly.

"Don't worry, he can explore freely these waters without any problems, his old homeland was where he's heading." The navigator answered calmly, sharing a drink and inviting her to sunbathe.

"I want her to worry about me too!" Mineta stood beside Sanji as he sobbed into a napkin.

Without a path to take or issues to resolve, time seemed like an eternity. The heroines made the most of their spare time to clean their filthy bodies that had been donning the same stench-filled, sticky attire for over a day.

Meanwhile, the trio of rampaging pirates got their water guns and started a war between them. The professional heroes observed from Usopp's garden how their trainees gathered so that they could agree turns to bathe once the girls were out.

Some of the heroes were still concerned by the pirates' behavior, watching carefully for any outbursts coming from them. However, they could not forget that when things became tense, the affable captain did not hesitate to listen to both his nakama and his guest worrying about both of them without taking a side... Even when he got upset, he took care of his opponent returning him on board at the end of their fight.

As the teachers discussed their concern; the musician enjoyed the view, happily sipping a cup of tea outside the dining area when Luffy, Usopp, and Chopper sneaked behind him and managed to ambush him with their water guns, dousing him in sea water without notice and leaving the weak skeleton on the floor.

Out of nowhere, the three rascals switched targets and opened fire on the young heroes who were standing patiently on the deck.

"What's the matter with you guys! Stop acting like children and behave your age!" Iida complained in annoyance.

"This salt water is going to ruin my suit!" Aoyama was on the verge of tears and about to have an anxiety attack after being so disheveled.

"Luffy san, stop it, we're not playing." Deku joined in the complaints, shaking his suit.

"But you're going to bathe anyway!" Whined the captain.

"BATH TO GO!" Yelled Usopp who upgraded his gun attaching it to a barrel on his back firing at everyone.

"How can they behave like nothing after what happened?" Aizawa commented irritated. "It's unbelievable how that group of kids can keep us on our toes."

"Young adults, Shouta..." Corrected Mic

"Just physically, because they still behave like a bunch of children..."

Luffy disconnected the hose that joined with Usopp's barrel, taking a deep sip to keep all the water in his mouth and be able to shoot water spit bombs, throwing them at the youngsters who began to defend themselves with their quirks.

"What are you? A freaking llama?" Sero yelled annoyed.

"AAAARG THIS IS SO FUCKING DISGUSTING!" Bakugo yelled in anger, provoking explosions, chasing the boy with the straw hat who only fled in laughter.

"How unpleasant..." Todoroki said, tried to squeeze his wet shirt.

"THIS IS UNACCEPTABLE, IT'S TOO ANTI-HYGIENIC," Iida tried to shook his suit in irritation.

"Take the water barrel away from him!" Kirishima joined the hunt for the captain that couldn't stop laughing.

"FORGET THE BARREL, DON'T LET IT SPI~BRRRRRR!" Denki's words were stopped after a spurt was directed straight into his mouth. "BWAH SO GROSS! "He screamed nauseated, wiping his tongue in despair.

"Indirect kiss..." Thought the boys.

The captain was becoming thrilled as he appeared to have begun a game of cat and mouse, escaping all of the strikes fired at him by the heroes who fight all out, not being limited in their use of their quirks.

"YOU CAN'T USE YOUR ABILITIES ON THE SHIP!" Their teacher rebuked.

"Let them be Shota… At sea they are free to do as they want." Claimed the sniper.

"Then we are not responsible for the damages..." He just wanted to sleep without worrying, but he couldn't until the matter was resolved.

The captain had no trouble fleeing from the boys who were attempting to catch him. The pirate chuckled and hurried away, shooting water bombs from his mouth directly to their eyes, causing them all to stumble or crash in different parts of the Sunny.

The professors continued their chat, discussing on how to handle the situation of a few moments before, when they were suddenly pushed by All Might, tossing them to the ground and narrowly avoiding an attack from the captain, who had shot out from the mast towards Yagi.

"He came out of nowhere!" Mic reacted in surprise.

"You're getting better Zombie!"

"LUFFY GIVE ME A BREAK"

"No." He said with a huge smile and then went away, being pursued by the green-haired with his Quirk active, leading Luffy into a trap to catch him.

The children's game proceeded to cause a commotion on deck, while the young heroines and pirates were so relaxed in the bathtub that they didn't even notice until they got out to see all the fuss.

With the captain tied to the mast with a piece of meat stuck in his mouth, and the girls out of the bath, the boys formed groups to enter the bathroom which was not big enough for all of them; nevertheless, a sudden shadow in the water drew their attention.

"Oh no, more monsters?"

"Shishishi... He's here." The captain mentioned cheerfully, feeling the presence of his nakama, who soon surfaced.

"Jinbei san, did you find anything? "Asked the skeleton as he saw that the Fish-man with a grin on his face.

"Hey, let me down!" The captain demanded, biting the tape that was holding him.

"Did you find Poneglyphs in the depths?" Asked Robin.

"I found something better. "He mentioned with a wide smile.

"I wonder if he found a beautiful mermaid community~" Said the cook singing with his clasped hands and burnt hair.

"Sanji san... What happened to you? "Asked the freckled in surprise as he saw his mentor with charred and tousled hair.

"Nothing... Just punishment for seeking paradise."

"He tried to snoop during the bath." Nami clarified, carrying her Bo on her shoulder.

"That explains why Mineta and Mr. Brook also have burnt smell.

"So, Jinbei… Are there mermaids?" Asked the cook elbowing his ribs.

"I think I should better show what I found to you."

"Did you carry a camera with you?" Mina inquired

"What? Explain yourself!" Demanded the heroes.

"Wahahaha, you'll see." Jinbei smile was framed by his white lower fangs. "Prepare your things... We're going down."

"How? We don't have any equipment to coat the ship." The cyborg asked.

"That won't be necessary."

"What do you mean with 'coat'? Ships can't be submerged." Sato objected.

"Really, you're going to doubt what can and can't after seeing all we've been through. "Kirishima commented, confident in the ship's capabilities. "If they say ships can travel underwater, ships can travel underwater!"

"I like this Kid" Franky said pointing to the cheery red-head

"Yes, they're called shipwrecks..." Katsuki mocked.

A huge shadow matched the Sunny, alerting the crewmen.

"It's huge!" He peered out cautiously.

"Another Sea King?" Asked Todoroki, unfazed by the approaching silhouette.

"No, it looks smaller." Deku replied

A massive oarfish rose to the surface, with ropes made with saragasso attached to its long body; trailing a giant white carriage constructed of large cut pieces of carved dried coral, ornamented with shells of colorful tones and a purple cowrie shell sprinkled with shades of the same range that covered what can be considered as the roof.

"WHAT?"

"A TSUNAMI IT'S GOING TO HAPPEN! THE OARFISH ARE BAD OMEN." Mic shouted in desperation, shaking his hair with his hands.

"Why does he have a carriage? "Toru asked.

"What exactly did you find Jinbei?" Franky asked intrigued, seeing how the Fish-man couldn't stop laughing.

"Everything."

"Everything..." Usopp imitated his voice "What does that mean?!"

"You'll see."

Jinbei jumped into the water approaching the carriage to the Sunny, for then taking a side ring that, when extended, formed a bubble and provided access to the entrance; letting a carpet of sea sponge swell at the bottom of the bubble, indicating the way inside the carriage.

"Guests first." Brook invited to the confused heroes who were unsure of what was going on.

"Is it safe, Mr. Jinbei?" Koda asked a frightened with trembling hands and legs.

Before the Fish-man answered, Tsuyu confidently jumped into the air path, landing on the soft platform looking at the interiors of the carriage being captivated by them.

The interior decor was cozy and inviting, perfect for an extended journey. Around the perimeter were soft yellow couches with orange accents, and in the middle was a bar with a glittering nacre pearl surface and a base composed of various wave-sanded crystals. Snacks could be seen on top of the bar, and beverages in a blue mini bar… It appeared to be a self-service area.

Everyone stopped second-guessing when they saw the small heroine wandering in with assurance and followed her, amazed at the enormous contrasts in conveyance.

"Where did you find it?" Kirishima asked from one of the windows to Jinbei who was watching them enjoy the transport.

"It's very well kept for an antique." Iida analyzed the interiors, running his hands over the furniture.

"It doesn't look old." Momo commented after noticing that the area was spotless, with no traces of dust or mildew.

"There's food!" Ochako ran to the treats, grabbing a few and sharing them with Toru and Tsuyu.

"It's so cooooomfoooortableeee~" Mina said, plopping down on the cushioned couches.

"Look at this weird food and strangely flavored tea." Midnight was awestruck by everything on the bar.

"Sodas! "Mic dashed off in search of some artificial flavor, but all he found were drinks with various seaweed flavors, leaving him disappointed.

After listening to the comments of his partners, the remaining heroes were lined up eager to enter the transport.

"Jinbei, what about the Sunny?" Asked Robin.

"Don't worry about it, The Thousand Sunny will be safe… The wall is a neutral zone, once everyone boards, I'll keep him in a safe place."

"How can you be so sure?" Franky said worriedly

"Wahahaha, you'll see."

"Fufufu, I'm excited."

"Yosh! Hurry up, I can't take it anymore, let's go on an adventure!"

"AYE!" Shouted the straw hats.

"AYE!" The heroes joined in.

Jinbei stowed the platform as everyone was done boarding, closing the entry afterwards. After leaving everything in order with the charier, he proceeded to dive away from it, grabbing the water with his hands creating a large wave that lifted the Sunny towards one of the high holes in the red stone.

The cradle-shaped hole in the Red Line allowed the ship to float, along to being protected by the walls.

After securing Sunny, Jinbei re-joined the group, observing as the majority eagerly watched in awe through the resin bubble-covered windows.

"This is so beautiful." The reflection of the water's movement mirrored Mina's astonished expression.

"How is this possible?" Todoroki asked, analyzing the bubble that protected them.

"Coating," Franky answered.

"But is it safe? If it bursts, we will drown." Mineta asked terrified

"The pressure will made our bodies implode, so don't worry about drowning."

"ROOOOBIIIN!"

"Stop saying scary things!"

"Well… It's not a lie." said Jinbei

"I'm concerned about the pressure; without the right conditions, we won't even be able to endure the hundred meters." Momo said uneasy along with Shoto.

"Ow! Don't worry, the coating is made of a particular resin that enables the objects coated by it to be unaffected by the pressure."

"Although let's remember that only thirty percent of the coated ships reach their destination. "Robin said frivolously.

"ROBIN! CHILL WITH YOUR DARK THOUGHTS! "Complained Present Mic shaking in fear.

"Robin please, do not to scare my students." Aizawa requested to the pirate who only laughed lightly.

"Robin! This isn't the time to scare them for your own amusement" Franky joined the hero

"Fufufu"

"WOW, look at those fish, they are huge!" Deku watched in amazement.

"Fascinating" Todoroki finally showed interest in his face.

"What if they attack us?" Koda questioned in the distance, almost trying to avoid the outside view.

"We attack them back," Luffy said bringing his fist in front of him.

"EH!

"But!

"Calm down, it's tough." Luffy tried to calm him down by extending his hand through the bubble to demonstrate his point.

"Loooook~nññ" His body weakened laying down with his limbs jelly-like, with his arm dangling outside the water carriage.

"Idiot! Don't touch the seawater." Usopp slapped him in the head.

"What happened?" The small group accompanying the captain asked in confusion as they watched him quickly collapse.

"In addition to being unable to swim, Akuma no Mi users are also weakened by water." Usopp explained while retrieving his captain arm.

"How useless!" Bakugo mocked, covering his mouth with one hand after spitting saliva.

"Still kicked your ass Bakago! "Luffy said weakly

"WHAT DID YOU SAY YOU FUCKING CHEWING GUM?!"

"Could you not fight in this place?" Nami struck both boys, knocking them to the floor.

"Nami, I request you... Please refrain from hitting my students."

"The bubble will burst if we don't keep these two idiots from fighting."

"How dare you, fucking bitc~..." A kick landed in Bakugo's face interrupting to finish his sentence, launching him out of the resin bubble that stretched until it releases him into the depths.

"AAAAAAAAAAAH BAKUGO!" His friends shouted in concern.

"NEVER EVER, CALL NAMI SWAN THAT VULGAR NAME AGAIN!"

The chef dodged Aizawa's scarf when it was hurled his way with a quick movement, stepping on it to stop the hero from using it.

"Sanji, don't you dare harm any of my students," Eraserhead grabbed the pirate by the collar of his shirt, looking at him threateningly with his bright red eyes.

"Then you need to keep a closer eye on them." He retorted angrily, removing the hero's hands from his garment.

The young explosive quickly recovered from the kick and attempted to use his swimming prowess to reach the oarfish. However, with his hands underwater, he was unable to produce glycerin or sparks and was forced to continue swimming through a crowded school of large yellowtail fish.

The young man was almost grabbed by the arm by a long pink tongue, but he avoided it by making his own way back to the carriage.

"Don't try to save me with your slimy disgusting tongue again, extra."

"You don't have to be so rude, kero."

"Bakago! Apologize to Tsuyu chan." The blond was annoyed hiding his menacing gaze.

"Thank you Sanji san, but that's the way it usually is.

I couldn't care less how he is! He doesn't have to behave that way against someone who offered to help him... And Tsuyu chan, you don't have to condone that sort of abuse."

Eraserhead's scarf wrapped Bakugo applying pressure to his head, thus receiving a punishment for his behavior.

"Can't you behave yourself?" He chastised with his bristly hair, yanking his scarf so hard it distorted the hero apprentice.

"It's about time." Sanji muttered as he moved back toward his nakamas.

The landscape was beautiful, the water's cleanliness allowed light to enter, illuminating the path.

Hundreds of different species of fish also passed by them, along a small group of whales. Everyone was mesmerized by the scenery before their eyes, which left them with their gazes lighted in awe, as their journey was accompanied by the lovely song of the whales.

Unconsciously, different groups had formed throughout the journey, each reacting to the diverse circumstances in a unique way.

Mineta, Koda, Aoyama, and Present Mic were more terrified than the rest, with Usopp, Brook, and Chopper in charge of comforting the four heroes who ended up joining their screams of terror, stressing them even more, almost to the point of fainting.

The joyful youngsters, on the other hand, was led by the always cheery captain, followed by the upbeat Kirishima, Sero, Mina, Toru, and Franky, that were able to entice curious ones such as Nerumi, Denki, Ochako, Deku, and the pair of Fish-men to approach and enjoy themselves in their company, only to be interrupted by the friendly attentions of the cook, who used the delivery of drinks as an excuse to approach the heroine.

Meanwhile, Nami and Aizawa couldn't help but be concerned about the threats they could encountered along the way, remaining wary of their surroundings; Soon joined by both class reps, as well as the cautious Ojiro, Shoji, and Sato.

All Might approached the group of the young captain who watched in amusement as the light faded away. Yagi had never expected to witness such a spectacle of that magnitude; few people had been able to descend to that depth and now they were part of it... His interest had grown, forgetting for a moment his goal.

Todoroki, Fumikage, Tsuyu, and Jiro were all experiencing the enchanting beauty of a world they had completely ignored, with Luffy being the one who broke their peace and silence, insisting enthusiastically on adopting Shoto with his gang of rowdies, thus confusing the hero by the captain attitude who insisted on integrating him into their coexistence.

Dark shadow emerged excitedly by the darkness of the depth they were about to enter, but his abrupt appearance caused Luffy to return with Fumikage to bother his usually hidden being, who was unable to hide and ended up biting Luffy's head, with Fumikage intervening to separate both.

Bakugo distanced himself from everyone else heading for a snack, taking the opportunity to provide an alcoholic beverage from the fridge to the swordsman who had also moved away from everyone as he did not feel privacy among so many students. Both ended sharing the same row of seats in complete silence.

Unlike everyone else, Jinbei and Robin were patiently waiting for their next stop, resting on an empty couch, along the unconscious woman wrapped like a mummy.

The speed increased as the light faded into pure darkness, accompanied by complete silence and an icy atmosphere.

The darkness was so thick that they couldn't see each other, only knowing they were still together by hearing their voices and colliding with each other.

"I can't see anything, is everyone still here?" Midnight asked worried.

"Stay together and keep your distance from the windows." Eraserhead ordered.

"It's freezing."

"Let me warm you with a hug, Toru-chaaaan," the chef's singsong voice was heard approaching towards a small group gathered.

"Let go of me you stupid pervert!" Sparks momentarily illuminated the pair of disgruntled young men.

"Sanji san, I'm here." Hagakure's voice could be heard nearby, as she had moved once she heard the cook approaching.

"Isn't there a switch to turn on the lights?" Midnight was touching every surface, unintentionally pawing at several faces.

"I can create a little bit of fire."

"Thank you Todoroki kun, but the smoke will consume our oxygen." Iida explained.

"I'll take care of it..." The carpenter moved to the middle of the of the carriage.

"FRRRRANKY..." The boys eagerly listened stary-eyed, as they waited to see the cyborg's devices.

"NIPPLE LIGHT'O!"

"Why did you have to put them there?! "The students yelled complaining.

"SUCH A PERVERT!" Bakugo exploded in annoyance.

"Stop it, I'm blushing."

"IT'S NOT A COMPLIMENT, YOU IDIOT!

"These guys are unbelievable." Denki mocked sarcastically with a drop sliding in his hair.

"Thanks, Shishishi"

"WE DIDN'T MEAN IT IN A GOOD WAY!"

"Here... I created some lanterns "Momo started handing out the artifacts.

"Ah, Momo chan, thank you very much. Your skill has really helped us a lot. "Nami said as she received the artifact from the heroine.

"Hey, thank you." She blushed and arranged her hair.

"Once home, I must take an urgent vacation." Said Aizawa as soon as he regained his consciousness after being stunned by the bizarre carpenter.

"This is terrifying... How much longer until we get there?" asked Koda.

"About three thousand meters more." Replied Jinbei calmly.

"THREE THOUSAND METERS! "The students' hair stood on end.

A succession of giggles started to be heard from outside the carriage, drawing the attention of the passengers who were alternatingly scared, curious, and excited as they peered out the windows.

"GYAAAAAAAAH!" The frightened heroes couldn't help but let out a scream.

"That voice is from a woman, THAT'S A WOMAN'S VOICE!" The cook screamed in desperately while leaning against the bubble, with his iris scouring the slimy coating in a desperate attempt to find any sign of life in the total darkness.

"SANJI STOP, YOU'RE GOING TO GET PINKEYE!" Chopper scolded as he saw how the young man just wouldn't stop.

Upon observing Cook's intuition, Mineta, Kaminari, Brook, and Yamada all turned automatically and joined the border of bubble.

WHAT JUST DID I TELL YOU! STAY AWAY FROM THE BUBBLE!" Aizawa levitated his hair and scarf as he yelled angrily. "Black leg! Stop being a bad influence!"

"Shouta, you can't ask a pirate to be a good influence." Mic replied, still not taking off his sight from the coat, expecting to see something sensual and mythological.

Aizawa's patience was wearing thin; he noticed that he had lost control of one of his eyelids and that his teeth hurt after constantly applying pressure on his jaw.

"TCH... I can't take this anymore." He said with a mad voice. "All Might! This is your fault... You take care of them... I'm going to sleep," Finished the professor wrapping a sleeping bag around himself and curling up in a corner.

A small light began to glow in the void.

"That light! "Aoyama pointed curiously as he approached the edge seeing a small dot moving in the nothingness.

"Are we there yet? "Asked the reindeer excitedly.

"What do you mean, are we there yet? There's no light at the bottom of the sea!" Claimed Denki.

"Yes, there is..." Calmly interrupted the Fish-man.

"Boss Jinbei?

"Perhaps it's light caused by a predatory fish ready to devour us alive."

"ROBIN!" Heroes and pirates with their skill all pale of fright yelled in response to the archaeologist's idea.

It didn't take long until the carriage pulled by the oarfish approached where the series of lights location.

"HOW DO WE GET IT TO TURN? "HOW DO WE GET IT TO TURN?" Sato and Sero were attempting to grasp the saragasso ropes in order to direct the fish's movement.

"Gyaaaaaaaah," Usopp staggered backwards, stumbling over Aizawa and smacking his head on the bar, making his eyes and tongue popping out of his body. "Who put this caterpillar here? "He rubbed his head in discomfort as he groaned.

"EEEEEEEHH BUGS? WHERE?! "Mic, Koda, Nami and Sanji began to scream in despair at the thought of being surrounded by bugs.

"COULD YOU GUYS SHUT UP! "Bakugo yelled in annoyance.

The reverberating laughter gave the impression that they were surrounded; As small spots of light appeared in a succession, gradually approaching the carriage.

"Whatever it is… I don't want to see." Koda covered his eyes, being accompanied by Shoji who was always nearby to comfort him.

The dots intensified in a pattern, exposing what appeared to be a gigantic fish approaching them, prompting the pirates who prepare for an attack.

"Wait, what about the bubble?" Jiro asked concerned.

"It will hold," They replied with a challenging grin.

The oncoming lights multiplied and completed illuminating the rest of the creatures' bodies, leaving the men to stare in wonder.

Three beautiful and exotic mermaids of the deep swam playfully around the oarfish towards their carriage.

It was nearly impossible to see them because their dark blue skin with black markings blended in with the pitch-black darkness, but thanks to their bodies, which had two rows of bioluminescent dots reaching to the end of their shark-like tails with flashing green tips, they illuminated everything around them, revealing the fearsome and colossal fauna of the deep that surrounded them, causing some of the passengers to faint.

Two of the mermaids started swimming to either side of the carriage, while the third put her hands through the windows, shaking the cabin.

"THEY'RE GOING TO EAT US!"

"Captain, what do we do?" Mic, who was holding his hand to his mouth, asked Straw Hat.

Luffy calmly reached for one of the hands releasing the fingers one by one from the carriage.

"What are you doing!" The students yelled concerned, showing their sharp teeth at the stupidity of the captain.

"THAT'S YOUR SOLUTION?!" Toshinori coughed up blood and sweat streamed down his scalp in embarrassment after what he saw.

The face of the massive ten-meter-long mermaid peered through the doorless entrance. It seemed to stare with her large bulging eyes that resembled two orbs of light; not stopping smiling with her sharp needle-like teeth.

"It's scary! She is terrifying!" Mineta shouted in fright.

"She's beautiful! But scary," Ojiro said while blushing.

"Damn, she's Hot... "Whispered Mäkelä

"Non, non, c'est horrible!" Aoyama complained, not expecting mermaids to look like that.

"MELLORIIIIIIINEEEE~" Sanji approached the creature's face without stopping singing, spellbound by her attributes.

The mermaid blushed at the remarks making her cheeks lit up like glowing freckles and chuckled flirtatiously, letting go of the carriage and clutched onto her tail to swirl amusedly.

"I hadn't seen mermaids like that." Nami was fascinated by the unusual creatures.

"They've adapted to their environment, we don't know how much time has passed, nor what has happened to get to this point. " Concluded the archaeologist.

The laughter and singing of the mermaids resounded in the silent depths as they eagerly swam around the carriage.

"DON'T LISTEN TO THEIR SONG!" Mic commanded, covering his ears.

"Why? "Asked Chopper in confusion.

"They used it to hypnotize sailors, and then drown them!"

"EEEEEEEEEEEEEEEEEH!"

The youngest approached again, appearing to be the most curious of the three, flirting with Mäkelä, who was about to jump but was restrained by Tuna because the sudden change in pressure would instantly kill him.

"No Mäkelä! if you exit the carriage, your body won't take it!

"BUT SHE'S TOTALLY MY TYPE!"

"What's your type?"

"Fish."

The commotion in the carriage attracted the attention of huge fish from the deep that were coming to attack. Being the captain who sensed the creatures' intent by taking his arm asking the boys to make room to throw a punch. The carriage was jolted by the mermaids swimming ahead towards the threat.

The 3 maidens opened their mouths, showing their sharp teeth, and generated with their arms a movement similar to a dance spin that increased their speed, achieving an impressive acceleration, causing a whirlpool with their bodies, shooting out with their deadly open mouths, piercing holes in their victims heads, killing them instantly.

The glow of their bodies revealed the sea dyed red by the blood of the fish floating lifeless. The three women turned around smiling with the visitors freezing their blood.

"Dangerous... The depths are dangerous... Mermaids are dangerous..." Mineta, Kaminari and Usopp kept repeating.

" I can die happily if I got devoured by those cuties." The saw Fish-man smiled delightedly.

"Quit it Mäkelä! Calm down your weird fetishes!"

"I-I-I'm scared..." Aoyama put his hands on his head, suddenly being comforted by the navigator.

"Don't worry... They don't appear to be going to hurt us." Nami replied quietly, seeing how the young man's appearance indicated richness.

"I'M SCARED TOO!" Cried Mineta panting.

"Hug her," stated Nami, gesturing toward the mermaid with thuge grin on her face, peering next to the young boy by the window.

"GYAAAAAAAAAAAAAH" The tiny hero screamed until he foamed.

"Oi, are you guys going to eat us?" Luffy asked bluntly to the three huge creatures.

"LUFFY, DON'T BE SO DIRECT!" The heroes scolded with their hair standing on end.

"Luffy san always says what he thinks..." Brook mentioned, explaining the captain's goofy behavior.

In response to the query, the mermaids started to giggle and moved closer to the rude pirate's window.

"I'm sorry to disappoint you, but you are not part of our diet." The curious one said as she gently touched the captain's nose with her lengthy claw.

"We have never before dealt with surface intruders." Added the middle-aged one who seemed to be the most talkative of the three. "Congratulations on being the first humans to make it this far, Ke-ke."

"Don't be afraid; we'll look out for you so you get here safely." The curious one enthusiastically moved closer to the carriage.

"Get where?" Jiro asked.

"Well, if we are descending to the depths to search for a vanished civilization? Could it be Atlantis? Momo raised her eyes with interest, while placing her palm on her chin.

"Atlantis?" Some of the pirates tilted their heads.

"A lost kingdom underwater," Tokoyami, a mythology enthusiast, explained.

"Teke-keke"-keke-keke" The mermaids laughed all around them, illuminating the surroundings.

"Atlantis! Hahaha!"

"Atlantis is located on the opposite side of the globe! Teke-ke-ke-ke! You are reaching Lemuria," Explained the chattering mermaid.

"Lemuria? That sounds so familiar…" Nami said.

"The Oracle mentioned in her diaries." Robin answered the navigator. "The lost continent according to the writings of the traveler Le Plongeon..."

"I have heard of it." Tokoyami joined the conversation. "The archaeologist Augustus Le Plongeon... He spoke about a lost continent between Asia and America. His writings and research were rejected by the scientific community for their improbable existence."

"So Lepogelon... He was right?" Uraraka asked as she recalled the theory that had been mentioned to them earlier on the cave.

"Le Plongeon..." His classmate corrected.

"Only two percent of the oceans have been explored... Will they know about the existence of Lemuria?" Deku pondered this as he recalled how it was stated that although they were unaware of the reason, humanity focused on investigating the surface of other planet, but not the deeps of their oceans.

"I don't know, but the mermaids claim to have never encountered a human before, so there's a chance, researchers haven't reached this point. "Iida joined in the conjecture.

"Pardon me, lovely ladies. When was the last time humans visited? Mic inquired politely.

"Mmmmm... Are we allowed to say it?"

"No details." The older reserved mermaid who had no interest in the group gave her permission.

"Thousands of years." Confessed the chattery mermaid, following the quiet one who went ahead, leaving them behind.

"Wait, where are you going?"

"To clear your path; These stalactites have sea urchins that hurl venomous needles." She said cheerfully, painting the water with light as she swam away.

The carriage eventually made it to the bottom, where the illumination of the underwater wildlife revealed a graveyard of fish and whales, with luminous snails eating on the carcasses.

Throughout the course, the mermaids collected and held the needles that were thrown at them.

With the trio of warriors' protection, the journey became peaceful, untroubled by the perpetual darkness, until a glimmer of warm light began to show in front of them.

A flame-like radiance emanated from various crystals embedded in the soil, comforting everyone by their soothing light.

The ambiance was magnificent because of the dim light, which created a calming pleasant atmosphere despite the depth. One could claim it was the calmest moment they had experienced during the entire trip, entering all of them into a zen state.

A soothing melody was hummed by the captain lying down along with his goofy duo, being heard by the musician.

"What a nice tune, where did you hear it?"

"Ñeeemmm... I don't know." He said, pressing his temple, turning red from thinking.

The skeleton picked up his violin paying attention to the tones that Luffy was humming.

"What's that, B Minor?" He mumbled, placing his phalanges on the violin's strings playing a low note. Sliding his bones over the strings to emit a D note holding it in vibrato… He continue to play as he heard the humming of his captain.

The soothing melody wafted through the room, making the pirates smile as the heroes listened intently to the familiar composition.

"Why does it sound so familiar?" Wondered Mic

"Is it?" Aizawa turned his gaze to the group of criminals who looked lulled to sleep by the soothing melody.

All Might wide opened his eyes as he recalled his experience with that comforting tune.

"MR. BROOK, WHERE DID YOU HEAR THAT?!"

The lullaby had the opposite impact on the guarding mermaids than it did on the passengers.

A sail-shaped dorsal fin rose from their backs, illuminating everything from their clawed hands to the fins hanging from their limbs, giving them a predatory appearance.

Two of them fled in terror, hiding amid the rock formations at the bottom that reflected the pointed pillars. The older mermaid turned back to the carriage, her large eyes reflected everything in the room like a pair of mirrors; yet, upon closer inspection, everyone realized those eyes had no color nor pupils, indicating that the deep sea mermaids were completly blind.

The passengers were frozen as they watched a terrifying mermaid open her retractable mouth revealing the needles she possessed for teeth, realizing immediately which species they belonged to… Goblin Shark mermaid.

The heroes were unsure of what to do; the fear they had of damaging the bubble or worse stopped them from thinking straight or acting. But the mermaid, instead of piercing them all with her sharp teeth, simply let out a high-pitched shriek that stopped everyone, causing the interiors and resin to vibrate, forcing them to protect their ears.

Zoro unsheathed his katana ready to defend in case of an attack, but Kirishima and Tokoyami hung around his neck to stop him.

"You're going to kill us, you idiot!" Yelled Bakugo

"Bakugo, don't make him angry," Scolded Kirishima

"Let go of me you, damn brats!"

"Luffy! Do something! "Chopper demanded in tears.

"She's going to burst the bubble!" Aoyama, Mineta and Usopp joined the reindeer.

"Calm down... She won't do anything to us," The captain, who was staring at his reflection, directly into the creature's mirror-like eyes, declared with an expressionless gesture

Sharp cries could be heard among the seaweed of the pillars, where her friends were calling out to her.

Once the older one realized they were she retreated, waving its tail furiously in an attempt to flip the carriage, forcing them all to fall into the seats and roll to the roof, almost going out the windows that worked as a trampoline making them bounce safety.

"What just happened?" Nerumi asked as the cabin returned to its original position.

"Is everyone all right?" Sanji asked concerned, turning just to the girls.

"Yes, thank you Sanji san," replied Iida.

"I WASN'T ASKING YOU!

Darkness vanished, revealing a big grotto flashing a myriad of colors, as if there were a carnival within the depths. As they drew nearer, they became increasingly aware a film made with the same resin as the coating to preserve air inside.

Due to their prior experience, the pirates joyfully cheered upon spotting the brilliantly colored lights, knowing that they had already arrived. In contrast with the perplexed heroes that were unable to comprehend how the grotto could radiate so many colors or what they could find below.

The oarfish continued to move through the grotto, revealing the source of the varied light hues that came from the bioluminescent slugs that danced in the water, magnificently illuminating the path, making everyone's gaze radiate happiness as they had never seen anything similar before.

The grotto soon became a long tunnel and the water that filled it started to descend its level, creating a river that made the sea slugs creating the tunnel to be in complete darkness while everyone heard the bubble burst just as the air reached the windows. Meanwhile, the oarfish took advantage of the shallow water to swim with half of its body submerged while pulling the puzzled group along.

Everyone got briefly blinded by the change to total darkness as a fresh, strong light emerged at the end of the tunnel, illuminating the way that started to come into view.

The scenery was breathtaking. They could see the water illuminated by the light-emitting crystals and the gorgeously colorful fish swimming freely; it was like being in an inverted aquarium, with them being the ones who were trapped.

The carriage continued on its way approaching a harbor created by pastel-colored corals.

"Kawaaiii!"

"What is this place?" Aizawa felt his eyes burning after not blinking at the sight of the extraordinary underwater city.

"It's impressive..." Shoto could not conceive what his eyes were seeing.

"Definitely not ruins," Ojiro said quietly as his breath escaped the more he saw.

"Cities were like this in the past?" Nerumi turned intrigued with the pirates.

"It's similar to the old Ryugu Kingdom, but it has many differences," Jinbei clarified.

"It's not an island anymore... It is a continent," The archaeologist remarked marveled at how they were inside a vast Fault that seemed to had no end, all completely shielded by the coating of resin.

"I want to see mermaids already!" Sanji began to flutter with hearts in her eyes.

"But we've already seen mermaids..."

"The mermaids on the surface are gorgeous." Brook's perverse facial expression caused the cook's enthusiasm to spread among to the heroes.

"WE WANT TO SEE MERMAIDS!"

They were all in awe of the scenery they were seeing for themselves. All the colors of the rainbow were present, especially in pastel hues. The dwellings had organic designs that made them appear to be a part of the reef itself. Their roofs were made of different shells.

The floor was made up of huge pieces of brain coral in gradient shades of pinks, yellows and blues, ending in beautiful coral sea fans simulating trees.

The heroes could not help but get dizzy with the incessant movement of the water and its reflection that was projected by the light coming from the bubble shining on all surfaces.

Since everyone's attention was on the port they were approaching, they failed to notice how movement started to appear on both sides of the carriage.

Two sunfish emerged from the water with their dorsal fins extended, carrying on their backs a pair of lionfish Fish-men who kept a close eye on the visitors.

Without blinking or moving, the guards mimicked each other's movements as the sunfish continued forward guarding the trespassers.


Sundancer here:

We have now reached the Arc where the questions that have developed will start to be answered. ^o^
I hope you enjoy what is about to unfold.

Also, I don't have time to translate two chapters a week anymore TToTT, I will try to upload once a week.

Fun Fact:
Lemuria: The name of a lost continent proposed by Le Plongeon, who claimed that several lost civilizations were founded by Lemuria refugees. The theory developed with the help of the Mayan calendar, but it was popularized afterwards by Churchward, who wrote a dozen books about "Mu".
Mu would be known as the Pacific Atlantis, located between America and Asia/Australia, with an age ranging between 25.000 and 20.000 years.
Currently the concepts of Mu or Lemuria are dismissed as physically impossible by the scientific community.

SomeGuy2020: Thank you for noticing it! Yes, I've done a lot of research, and it's really fun to learn a lot of things: from myths, legends, conspiracy theories; Nordic, pre-Hispanic and Greek mythology, and later on a bit of physics. Much later I will also include Japanese folklore, which will be of great importance.