#bakudeku merpeople

[pinkykats-place]

BakuDeku Mermaid AU

Fics w/ Multiple Chapters

AO3 Recommendations

Mer Baku x Mer Deku

Disclaimers!

None of the stories linked are mine.

All contain mature content.

Art not mine - credit to @fihella

Note: If you read any of these stories and like them please let the author know with a kudos and/or comment!

Sunken Treasure by @queen-swagzilla

Summary: Izuku and Katsuki are mermen in the same pod. They're best friends—partners in crime—and they do everything together. They even take up jobs guarding the pod's territory together.

When Katsuki presents as an alpha, nothing changes. Izuku expects that nothing will change when he presents, either. But then, he presents as an omega. At first, he doesn't mind. Why would anything change? Besides, maybe now that he's an omega, Katsuki would consider courting him.

But instead, Katsuki all but vanishes.

Complete | 4 Chapters

Rated - Explicit

The Tides They Are A-Changing by @mjbunnyluv

Summary: When Izuku gets separated from his pod during the annual migration to the breeding grounds, he must rely on a strange mer to help him find his way home. Notorious for rejecting any and all courting gifts, the young mer is confused when he begins to develop feelings for the blonde stud. Fighting off feral mers, avoiding fishing nets, and oil spills, the pair grow closer, all the while trying to conceal their true feelings for one another.

Complete | 10 Chapters

Rated - Explicit

A Love Song from the Deep by MadameButtButt

Summary: His pod has always feared the Dragons, the alien clan that dwelled among volcanic vents of the deep, and with good reason. No one has seen one in generations, but Izuku heard stories of blind, listless things that drifted along the sea floor like ghosts.

— — —

Wherein Izuku is a curious merman, and his new friend is very fascinating.

Complete | 5 Chapters

Rated - Explicit

Trapped by jaegerackereri

Summary: Izuku knew he shouldn’t have followed that seagull towards the coast. He knew that’s where the humans were and he was told many a story of how destructive they could be.

But being just a little gup he had foolishly followed the pretty odd bird towards the land where sea meets sand.

And right into the hands of three exotic animal dealers…

Incomplete | 13/? Chapters

Rated - Explicit

Series: Breathe In by @contrarybee

Summary: Midoryia Izuku was born in captivity. He's never known the ocean.

His human carer Yagi-san tells him they're getting a new merman in the aquarium, one that they hope Izuku might like. Having been alone since his mother's death, Izuku is beyond excited to have a new mer around, but Bakugo Katsuki might prove to be too much. Or maybe he's just right.

3 Works | No Quirks

#1 is complete & 9 chapters

#2 is a one shot

#3 is complete & 10 chapters

Rated - Explicit

Forbidden by jaegerackereri

Summary: After the SharkMers went extinct, there only remains a handful of them throughout the ocean.

Adopted SharkMer Izuku is taken in by TropicalMer Inko after a traumatic situation in the reefs, and she raises him as her own. 15 years later he just can't get the idea of exploring out of his head. He feels like there is someone out there searching for him, another one of his remaining kind.

Incomplete | 24/? Chapters

Last updated June 2023

Rated - Explicit

[triforceangel13]

A Sea of Green and Red Ch. 5 (a Bakudeku Mermaid Au)

Chapter 15: Along the Horizon

Katsuki sighed as he laid out on the hot sand, letting the sun soak into his bare skin. His clothes laid out next to him, drying save for a piece of cloth he saved his own bits.

Kirishima was next to him, doing the same and keeping his head turned to give the other male some privacy and not to stare. It was just weird if he did.

Humans weren't meant to live underwater. Their bodies were not adapated correctly to be surrounded by the water that much.

Katsuki had noted he was feeling bloated and his fingers were gettng wrinkled from being underwater for so long.

It was agreed that he and Kirishima needed some time on land to recover before they took back to being under the waves.

Plus it was a good way to keep an eye on the horizon for an incoming ships. They had to be ready in case they were close by.

“Can I ask you something?” Kirishima asked him.

“Hm?” the blonde responded, cracking an eye open. He was enjoying the sun so much he felt like he was going to fall asleep.

“What do you plan to do after all of this?” Kirishima asked him. “After we save the merpeople. We don't exactly have a crew to go back to.”

Katsuki sighed, looking up at the clear sky.

“Don't know,” he said. “That depends on what Izuku would want to do.”

“You're basing the rest of your life on what he decides?” Kirishima asked skeptically. “Seems a bit heavy to put on one person.”

“When I said I loved him, I meant it,” Katsuki stated bluntly. “I'm not going to just turn back now after everything.”

“But what if he wants to stay in the kingom? Something that he knows,” Kirishima pointed out. “You and I are clearly not meant to be under the waves. I know they have breathing magic but unless they have a way to make it so our bodies don't deteriorate under water or to turn us into merfolk, I don't know what'll happen.”

“Guess I'll be living on an island waiting for him to come and visit,” Katsuki sighed. He wasn't about to leave unless Izuku told him so. But even then he didn't have a home really to go home to.

He couldn't go back to that island after what happened and the ship had been his other home. Clearly now he had no other options.

Unless he went back to his parents with his tail between his legs so to speak.

Was he too proud to do that?

He was also a wanted criminal. Pirates weren't the good guys as so many pointed out. Even with a change of heart no one was going to take Katsuki seriously. They'd rather claim the reward money and not deal with the consequences.

“Why did you have to make me think,” Katsuki sighed heavily, flopping his head flopping back against the sand.

“Sorry man. I'm thinking the same sort of thing,” Kirishima said with a sounding like a pout on his face. The blonde lifted his head and rolled his eyes seeing his friend sort of was.

“You falling in love with Pinky?” he asked with a slight knowing smirk.

Kirishima flipped over right away, his eyes wide and his cheeks burning red just as bright as the hair on his head.

“N-no,” he stammered, his eyes seeming to hold a flash of fear as he spoke the words. “That's not it at all.”

The blonde raised a brow at him and Kirishima wilted a bit. Katsuki sighed, sitting up, crossing his legs so he was a bit more modest.

“Kirishima, it's alright,” he said to his friend. “It happens. It comes at you before you can even think. And it holds on tight.”

The redhead sighed, sitting in the same kind of position and rubbed the back of his head.

“It feels weird. I've never had this before,” Kirishima sighed softly. “But there's no way she could love a human like me. She wasted her time on me and her kiss on me..I wish there was something to do to pay her back.”

“How do you know, have you asked her how she feels?” Katsuki asked.

“No. Haven't had the time. We've got bigger issues at the moment,” the redhead sighed heavily.

“Right...” Katsuki agreed. He honestly never thought to ask his friend about what he wanted to do in this situation. “You know this is my fight. Why did you stick around?”

Kirishima frowned and rose a brow.

“You're my friend. And I care about you and Izuku,” Kirishima said. “And if I can help stop Tomura from getting his way, then I want to. I have some of my own personal beef.”

The blonde couldn't help but smirk a little at that. His friend had his own personal beef with the captain. And he should. He was just trying to help out his fellow crew mate for something wthat was just morally wrong on the captain's part and he was nearly killed because of it.

“Thank you,” Katsuki said. I do owe you after all of this,” Katsuki told him.

“I'm gonna hold you to that,” Kirishima said with a nod.

The blonde let out a snort and then let out a sigh, looking out to the water. He hadn't slept well. Aside from the fact that he was underwater, his mind would not leave him alone.

He kept wondering if Izuku was alright, if they had released him yet. It had been a while since he had seen him.

Would he even believe he was real when he saw him again. The last thing he saw was Izuku's panicked eyes staring at hima and then that horrible scream of agnoy.

There was no way he was forgetting the sound of that anytime soon.

Was he even alive?

“Hey man I know what you're thinking. I think he's okay,” Kirishiam tried to cheer him up. Katsuki smiled a bit and let out a sigh.

“I do hope you're right,” Katsuki sighed. “He looked so scared... I felt powerless to help him at all. What kind of mate am I if I can't even protect him?”

But it was also that he wasn't sure if Izuku would even consider him his mate. Sure they had gotten very close and they had slpet together. But was that enough especially after them getting caught?

“You're still over thinking it,” Kirishima pointed out, spitting out a bit as Katsuki had gone and tossed some sand at him.

The redhead did right back at him and the two had a gentle laugh until Kirishima paused.

“Oh no,” Kirishima said softly.

“What?” Katsuki asked, following his gaze and froze.

On the far off horizon was a few ships. It was hard to make out how many with how far off they were. But one thing was certain.

The black flags waving in the distance gave a good indication that this was happening. Katsuki had been right.

“You know sometimes I hate it when I'm right,” Katsuki sighed. “They're a few days out at this point from the looks of it.”

“We should go warn them,” Kirishima said, standing up and went to get his clothes. Katsuki leaned over to grab his own. Sandy and still a little damp but it didn't matter.

They had to get back under the waves and warn Shoto and his kingdom that there was a threat coming and they were close.

But that meant that Izuku was unknowingly leading them.

*

Izuku could cry. These waters were becoming familiar. He was almost home. He could put all of this past stuff behind him and just live the rest of his days in the little home with his mother.

There was nothing for him on the surface any longer, despite how unique it was and how much he had enjoyed his time. Katsuki was gone.

He could raise the little guppy on his own under the waves.

He just hoped he wouldn't be thrown in the prison. He had harmed the prince after all. But being in a prison of his own kind seemed a lot better than being with the pirates.

Maybe they would take some pity on him and at least let his child be born. Even his mom would be able to come visit him.

All of this was hoping of course. There was no gurateee they wouldn't take his life on the spot.

He shook his head as he swam. He had to focus on getting home. He couldn't think about such things to make him panic or cause stress to his little guppy.

Espeially if he went down that road again thinking about he father of his child...

There was also the fact that he felt like he was being followed. He had searched all around him but nothing ever came up.

He must be imaginging things. Or maybe even Katsuki's spirit was following him around, wanting to be with him even after death.

“Izuku!” came a voice and he paused, looking around him. Maybe he wasn't feeling things and someone was actually following him?

“Who's there?” he called out and soon Shoto came swimming out from the nearby large patch of coral. Instantly warning bells rang in his head.

He curled in on himself a bit, bowing his head a bit and looked around to see if there were any guards coming their way.

The only one that swam closer was a fellow mermaid Mina.

“Thank goodness we found you in time,” Mina said with a breath. “I didn't think we were gonna catch him. He swims fast.”

“Well all that matters is that we stop him here,” Shoto stated.

“Please don't take me away,” Izuku said shaking his head. “I just want to get back home to my mother. Please.”

“Take you away? What are you talking about?” Mina asked. Shoto sighed, shaking his head.

“I'm not worried about what you did Iuzku. We can't have you coming home,” Shoto said. Izuku felt tears brimming his eyes.

He was being kicked out of his home?

“But...”

“Your highness, you're just confusing him,” came a familiar voice, his mother catching up to them and smiled upon seeing her son. “Oh my boy, come here.”

Izuku swam quickly to his mother nad hugged her tightly, the tears and sobs coming quickly. He felt such relief upon seeing his mother again.

But that still didn't stop the confusion of why he wasn't allowed to go home.

Inko pulled back a bit and cupped her son's face.

“This is for your safety but also the safety of the kingdom,” she said gently.

“Can someone pease explain to me why I can't go home? I was mernapped, held prisoner, watched the love of my life die before my eyes, and am pregnant on top of all of that. Why can't I go home?”

“You're pregnant?” came a voice that Izuku thought he never thought he'd hear again.

Slowly he turned, his heart doing flips in his chest. There Katsuki was, Kirishima behind him, holding fast to a rock that kept him planted on the sea floor.

“Kacchan,” Izuku said with a watery smile. He swam quickly to the man, hugging him tightly, burying his face into the side of his neck.

“I can't believe you're alive,” Izuku whispered.

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[elisea-enteabstraido]

✨🧜🏼‍♂️✨

[fernandesart]

Mermen🐬

[pinkykats-place]

Mermaid AU Human Bakugo x Mer Midoriya Ⅱ

AO3 SFW Recommendations

Disclaimers!

None of the stories linked are mine

None contain smut - all are SFW

Credit to @novaneondream for fan art.

Note: If you read any of these stories and like them please let the author know with a kudos and/or comment!

Shipwrecked by Withstarryeyes

Summary: When he wakes there is a man above him. He’s backlit by the sun, features blurred out by too much light, and Bakugou shifts upwards abruptly. The man slinks back, but lingers, hands outstretched as if he’s afraid of what Bakugou might do. In the background, waves crash onto the sand, and Bakugou turns, searching for his ship, for his crew. He screws his eyes shut, breathing quickening as he remembers the storm and the feeling of the deck on the waves. Something cool connects with his cheek and Bakugou opens his eyes, scrambling backward without thinking.

One Shot | SFW

Made To Be Held In Your Hands by BrandWhoreStarscream

Summary: Just a cute fic about Kacchan finding his soulmate when he's very young, a cute little mer he dubs Deku, but no one believes him about his fishy friend. Cuteness abound.

One Shot | SFW

the one where katsuki is a pirate by Kasplode

Summary: Katsuki and his crew take down an enemy ship, and Katsuki gets distracted by a certain mer.

One Shot | SFW

Fish Eye by sweetautumnwine

Summary: Izuku, a solitary merman, finds himself captured by aquarium staff and imprisoned in one of their laboratories; the man assigned to observe him, Katsuki, was on the boat when he was ensnared in the nets. As they grow to know each other more, Katsuki must decide where his duty lies, and Izuku must learn what his heart desires.

One Shot | SFW

Home is where the waves crash by tiredwrites

Summary: Izuku thrashes in his cage, the fins that line his large tail flare with a dangerous purpose. The claws his fingers taper into slice through the water and catch the light that filters into the clear water of the aquarium tank he's in.

His gills flare in irritation as he flips around, muscled tail ramming into the three-inch glass barrier with a thundering BAM!

Bioluminescent sacs under clear scales flare and glow, flashing a brilliant toxic green. The team that had brought the merman into the tank watch the mer flail and roar, flexing the powerful jaws that can often unhinge, like a snake.

{One Shot}

The King and Dad by Serah_chan

Summary: Alpha!Mer!Deku, King of the Seas, Nightmare of the Deep, and Sucker for Human Kacchan.

The King of the Sea doesn’t need a mate, but the second he lays his eyes on a feral looking blond teaching his cute little calf how to snorkel, the “doesn’t” turns into a “maybe”.

3/? Chapters | SFW

Last Updated Nov 26

Sand is Land and Sea Inbetween by Frost_or_Fire

Summary: Katsuki is by no means a marine biologist, really, and he knows that he could just walk away and act like he saw nothing. Act as if he didn’t see a half-human body laid across the late October sand while a black tail is still in the water, sorta concealed by the rolling waves that washed over the figure. He could just act like this is all just some dream that his subconscious cooked up for him to be put through to show how miserable he actually is.

But Katsuki fucking Bakugou is anything but a coward and a sick person.

----

Bakugou finds a Merperson on a beach and takes them home to help with their injuries, and possibly get more than he bargains for.

Incomplete | 8/? Chapters | SFW

Last Updated 2022

At An Ocean's Divide by that_enby_nerd

Summary: An AU in which Midoriya is a merman living near the kingdom of the Bakugo family, and a forbidden connection forms between the prince and a knight of the sea.

12/? Chapters | SFW

Last Updated May 2022

Save to Swim by sanjusangendo333

Summary: Izuku is out for a run, when he spots a blond man in distress in the river. He quickly strips off his shoes and clothes until he's barenaked to save him. But Katsuki is not in distress and nor is he a regular guy. He's one of the men from the elite diving unit of Japan’s coast guard who is in the middle of diving exercise.

Katsuki and his unit all agree that, ‘WOW! Izuku can swim really well and so fast!’ He'll really fit well in Katsuki's diving unit, they all say as Izuku is still in the water. But Izuku hurriedly excuses himself and swims away, because otherwise, they'll see the fish tail that his legs transformed into the moment he dived into the water.

Katsuki, of course, does NOT give up on trying to recruit him.

{One Shot}

Rated - Teen & Up

Wish by Darkshadow

Summary: Eight year old Katsuki goes to the beach only to spot the most beautiful creature he has ever seen, can he convince the merman to stay by his side even through times of struggle

{One Shot}

Rated - Teen & Up

Fish Eye by sweetautumnwine

Summary: Izuku, a solitary merman, finds himself captured by aquarium staff and imprisoned in one of their laboratories; the man assigned to observe him, Katsuki, was on the boat when he was ensnared in the nets. As they grow to know each other more, Katsuki must decide where his duty lies, and Izuku must learn what his heart desires.

{One Shot}

Rated - Teen & Up

What Lies Below by Anonymous

Summary: Momo screams at her father, she is a scientist! But mermaids must be real! She’s fascinated by the endless scientific possibilities. One day Momo meets another scientist with dreams like her, Iida Tenya. They devise a plan to conduct a voyage to a mysterious island, rumored to have merfolk living below. They struggle to gather a crew as many claim them insane.

Thus they gather Katsuki, son of the Queen, pro navigator, known for his brutish behavior. Kirishima, who spent his whole upbringing on the sea. Plus the two morons, Mina and Denki, as Katsuki claims.Izuku is a merman prince enamored by humanity, much to the dismay of Todoroki. Always worrying his parents, as he disappears to scavage the ocean depths with his best friend Ochako in search of human trinkets. The kingdom adores the Prince. Although some fear Izuku’s curiosity could be fatal.

Todoroki is the protector of the island and the mermaid kingdom below it. As King Toshinori’s powers weaken, Todoroki, a descendant of the Gods, becomes his apprentice. He aims to protect all those he loves yet Izuku makes it near impossible. Todoroki will not let the past repeat, humans are NOT to be trusted.

Read as their paths collide.

4/? Chapters | SFW

Last Updated 2020

[pinkykats-place]

BKDK Mermaid AU Mer Bakugo x Human Deku Ⅱ

AO3 NSFW Recommendations

Disclaimers!

None of the stories linked below are mine.

All contain mature content. Read tags.

Art work is not mine.

Note: If you read any of these stories and like them please let the author know with a kudos and/or comment!

A Salty Distraction by Viridian_Sunset

Summary: Deku has a shitty day at work and finds comfort in his mermaid friend.

{One Shot}

Rated - Explicit

One Fish, Two Fish, Half Fish, Marine Biologist by RandomFandoms65000

Summary: Izuku was ten years old when he met Katsuki aka a merman that the aquarium called Dynamight. As Izuku aged the merman never left the back of his mind it was one of the reason why he decided to become a marine biologist. He not only wanted to because of his love for salt and fresh water creatures, but to study Katsuki's species. Merfolk were rare and well the more they talked the more Izuku fell in love with the merman. Maybe he had always loved him.

Complete | 20 Chapters

Rated - Mature

Specks of Gold Against the Ocean's Waves by Serah_chan

Summary: While enjoying the light of the full moon, Katsuki Bakugou, an orange tailed merman, crosses paths with a handsome surfer with freckle littered cheeks. While he's not supposed to interact with the human, there's something about them that draws the merman to get close and ignore all boundaries.

“Huh, he’s kinda good looking for a human.” Katsuki muses, feeling the annoying itch of curiosity push him towards getting a better look. He wonders if he can observe him from down below as he takes on the waves, catch glimpses of him as he falls back to the water. Human eyes weren’t exactly the best anyway, so he shouldn’t have to worry about being seen... right?

Complete | 19 Chapters 

Rated - Mature

I’ve Got You, Stupid Human by GreenEyesSublime

Summary: The mysterious man swam the last few feet to the rock. Putting his hands up on the edge, he hauled himself out of the water with a flourish. Izuku watched in awe as first a toned, muscled chest emerged from the water and then a tight pack of abs followed by a dangerously sharp v-cut pointing downwards towards a...tail?!

— — —

Or, human!Izuku has been cleaning the beach for weeks and merman!Katsuki is tired of just watching. 

{One Shot}

Rated - Explicit

A Salty First Kiss by DarkMachi, Iwacakes

Summary: Izuku Midoriya's family beach trip went awry when an attempted act of heroism lets to an unexpected first.

Jumpcut to twelve years later: Izuku was struggling to stay afloat when his stepfather threw him a chance. What was meant to be a reprieve turned into something else entirely when he finds someone washed onto the beach. A memory he should have buried long ago, a kiss he could never forget, and a debt he could now repay.

Or.

What do you do when you have an angry Merman in your bathtub that speaks a different language?

Or.

What do you do when a stoopid hooman rescues you and then proceeds to start courting with you?

Complete | 101 CH | Contains Smut

Wavelength by gardengalaxy

Summary: Izuku practices surfing away from prying eyes, knowing he will have lots of attention on competition day. But what if he's already caught someone's interest?

One Shot | Trans Deku 

Rated - Explicit

A Breathless Song by chibicharlie95

Summary: Izuku loves the sea, so much so that he can never seem to part with it... But will he become a part of it? A siren's song in the middle of a storm may help him to find the answer.

One Shot | NSFW

what the water gave me by twinstarsies

Summary: "It's like I'm challenging fate," he says to a hermit crab he finds tucked into a crevice in the rock. "I'm daring it to knock me into the water just to show me who's boss. At this rate, it's probably going to win." 

"Something's gonna knock you into the water, alright, but it won't be anything as nebulous as fate," a voice says, tone wholly unamused. 

Izuku startles so hard that he forgets to use his quirk to catch himself as he slips from his perch on the rock into the ocean. 

— — —

Izuku goes on a forced vacation and meets the love of his life.

Complete | 2 Chapters

Contains Smut | Trans Midoriya

Call of the Siren by Gemsom

Summary: Izuku always imagined that sirens sang their victims into the water, and that their helpless victims could do nothing to resist. He almost wished that was the case.

Every time his captain’s ship crossed the narrow sea, Katsuki came to see him. The siren's friendship seemed so genuine, but Izuku was smart enough to know that the creature was sweet talking him to his death. Katsuki never denied it either - asking over and over for Izuku to offer his life.

Of course, Izuku had no way of knowing that the siren planed to give him a new one in return.

Incomplete | 9/18 Chapters | NSFW

Last Updated Jan. 2023

[pinkykats-place]

BakuDeku MerMay 2024 Fic Recs

archive of our own

Disclaimers!

None of the stories below are mine.

Few contain mature content.

Read tags. Check Ratings.

GIF not mine.

Note: If you read any of these stories and like them please let the author know with a kudos and/or comment!

Lured by huliganships

Summary: Izuku had always been fascinated by the sea. When he was still a child his mother told him that her mother had been a mermaid who had fallen in love with a human. Because of that the sea favored their family. Izuku had never understood what his mother meant by that, not until he had grown up and discovered his gift.

Whenever he sang, the sea listened.

Mer!Baku x Semi-Human!Deku

One Shot | SFW

Tastes Like Fucking Lionfish by jonabenkku

Summary: Izuku’s neighbour finds an injured Merman by the shore. Logically he brought it to his home, and suddenly it’s Izuku's job to take care of the stunning creature in a bathtub.

Mer Baku x Human Deku

One Shot | SFW

The Mating Grounds by huliganships

Summary: The mating grounds were a sacred place. The old songs that all mer children listened to while growing up told them of its location, about the peace that prevailed there, and how it was the last safe haven for every wanderer. Lure singing had become rare over the years, but most pods still had one or two elders who were teaching the gift to the younger generation.

While Katsuki was sure he would never need to travel there, he hadn't been prepared for how it made him feel watching Izuku swim away from him to find a partner elsewhere.

Mer Baku x Mer Deku

One Shot | SFW

Love in the reef by Dantalia

Summary: Izuku is a pretty betta bearer mer, who is shunned by his fellow mer because he is a male carrier. A rare second gender for males.

This year marked another year he had to spend mating season alone and in pain Izuku thinks.
Enter tiger shark Katsuki who takes an instant claim on the green mer and promises him a life time instead of a mating season.

Mer Baku x Mer Deku

One Shot | SFW

Find the feeding grounds by ContraryBee

Summary: Izuku is so hungry. The season is ready to change but he's unprepared. He's alone. He's wandering.

And Katsuki is the god's favorite: of course a beautiful, delicious, near-heat bearer would enter his territory, swim right into his hands. He's hungry too. Fucking starving.

mer!Baku x mer!Deku

One Shot | NSFW

Unwanted Gift by TigerLilies64

Summary: Prince Katsuki has been gifted with a merperson of all things. He's incensed that he would be offered such an inhuman gift, but rejecting it would threaten fragile diplomatic relations. So now he's got a chatty merman in his room that he never asked for. What is he to do?

Human Baku x Mer Deku

Complete | 4 Chapters | NSFW

His Freedom and His Fortune by s_the_queen

Summary: "He didn't say his name," she said, casting her eyes down. "He… he said you were friends. That he was looking for you. I made a mistake—" she broke off, a distressed cry at the back of her throat. Katsuki didn't care. His heart was racing. "I told him you made berth here to treat with another mermaid—a siren who fancied himself in love with you."

"Describe him," he spat. "Or I'll make it my mission to end your pathetic life."

She looked up at him, eyes sad. He didn't fucking care. "He had white hair and his face was weathered. He had unusual jewelry—a chain of clasped hands around his neck. His voice sounded like dry sand."

She needn't say more. He knew exactly who had his love.

Izuku was in the clutches of his greatest enemy—the pirate Shigaraki—the White Hand of the Sea.

-or-

Izuku, the siren who holds Katsuki's heart, has been kidnapped. Katsuki will do anything to get him back.

Human Baku x Mer Deku

One Shot | SFW

The Sea and His Possessions by ChickenAlfrado

Summary: Bakugou Katsuki lives a humble life as a young fisherman. Bringing his catch of the day to the local market to bring in money for himself and his family. Everyday, he has a ritual. Wake up, go fishing, go to the market, come home, sleep. After his father took ill, he had no choice but to take on the role as the bread winner for his household. Having just become an adult, he had no issue taking the family business onto his shoulders.

Until a certain terrible storm rocks his boat far from his comfortable ritual.

Human Baku x Mer Deku

One Shot | SFW

[pinkykats-place]

BakuDeku Mermaid AU Ⅱ

One Shots

AO3 Fanfic Recommendations

Mer Baku x Mer Deku

Disclaimers!

None of the stories linked below are mine.

Some contain mature content. Read tags.

Art work not mine - from madambuttbutt {ao3}.

Note: If you read any of these stories and like them please let the author know with a kudos and/or comment!

How to make you understand by Cadameo

Summary: Katsuki had a spear over his head, ready to protect his tribe from the unknown trespasser but all his fighting was stripped of his body when green scales and a blinding smile waved in his direction. He can't understand a word said to him but in his heart, he already knows he would mimic his way through the seven seas if it meant having Deku by his side.

Izuku calls himself a traveler, but that's as much as he can convey to a red-eyed blond mer that doesn't speak his language and gives him pretty gifts.

{One Shot}

Rated - Teen & Up

Mornin', Beautiful by mynameis152

Summary: There's a certain bit of bliss that comes from waking up to Izuku's face every morning, even more when the kids are involved.

{One Shot}

Rated - Teen & Up

fallin’ into the deep blue by xUnchartedDreams

Summary: The sea is beautiful, but.

What about eternity?

{One Shot}

Rated - General Audiences

angler and angel by mimocha

Summary: “Anglerfish! You- You’re an anglerfish!”

Said anglerfish mer pauses like he’s surprised to hear Izuku’s voice addressing him. He rises from his crouched position slowly, piercing vermillion eyes meeting Izuku’s shiny viridian ones.

He stares at him curiously as he asks, “I’m aware. And you’re an angelfish. Fuck are you doing, still hanging around here? Are you trying to be eaten?”

{One Shot}

Rated - Mature

The Reefer and the Shark by red_emerald

Summary: A school of fish rippled over Izuku like a glittering silver cloud. Delighted, he spun in place to feel the ribbons of current they made, and when the school cleared he came to a laughing stop — and froze, because there was a shark person floating a few short fin-strokes away, staring at him. He seemed just as surprised as Izuku.

They regarded each other in stunned silence.

--------

In which Izuku, a fragile reef dweller, meets Katsuki, a great white shark.

{One Shot}

Rated - Explicit

[pinkykats-place]

BakuDeku Fic Recs MerMay 2023

archive of our own

Disclaimers!

None of the stories linked below are mine.

All are SFW … still check tags.

Art not mine … by @fihella

Note: If you read any of these stories and like them please let the author know with a kudos and/or comment!

Disaster is My Love Language by @mjbunnyluv

Summary: Izuku, a marine biologist, rescues a struggling merman caught in a net. Once pulled out of the water and brought to the wildlife rehabilitation center where he works, it appears the mer's injuries are worse than he thought. While aggressive and furious that he has been forced into captivity, Katsuki slowly comes around to the idea that being taken care of isn't so bad.

Mer!Baku x Human!Deku

{One Shot}

Rated - Teen & Up

Against the Course by bundie

Summary: Bakugou Katsuki is an expert on mer and he's sworn to protect them from pirates and poachers. He joins a pirate crew to sabotage their hunt and comes across the most beautiful mer he'd ever seen. He's forced to drastic measures to protect Deku, even at the cost of his own life.

Mer!Deku x Human!Baku

{One Shot}

Rated - Teen & Up

Sharks and ocean predators by @silverynight

Summary: He's ready to dive in, when he sees a very weird black and dark orange fin, it looks like a shark's. He knows sharks are not usually aggressive, but he doesn't want to upset it, so he decides to stay on the boat for a while, hoping it doesn't see anything interesting and decides to go away.

However, the shark doesn't go, instead it bumps into Izuku's small boat a couple of times until the green haired boy falls into the water.

Izuku closes his mouth and opens his eyes to see the creature and realizes that's not a shark but a merman; he's never seen one like him before. Uraraka's fin is completely different from his; from the waist down he looks like a black shark and the rest of him looks like a blond boy with red eyes, sharp teeth and well built body.

Mer!Baku x Human!Deku

Complete | 2 Chapters

Rated - Teen & Up

to the Touch by meteormind

Summary: With those huge green eyes beading with pearly tears, he looked about as threatening as a limpet with its shell torn off. Katsuki squinted at the waving tentacles, wondering how they tasted, remembering the crunching chew he'd had the chance to appreciate the rare times he'd cornered a few of those shy creatures.

Then he remembered that he couldn't eat mer. It was frowned upon. Katsuki glared down at the merboy, his excitement fading into disappointment when he realized he probably wouldn't even get to punch something. "The hell are you lookin’ at?"

"S-sorry! It’s not-I wasn't trying to spy on you or a-a-anything!" the boy said at last, throwing his many squiggly appendages about his face. "I-I-I—"

Oh. It was a loser!

🦐 pistol shrimp katsuki x dumbo octopus izuku 🐙

{One Shot}

Rated - Teen & Up

Wild on the Beach by EpicKiya722

Summary: Rumi and Izuku, a pair of merpeople raised by caring couple Inko and Hisashi, find themselves interested into some new humans that arrived on the beach. The interest is very mutual.

Mer!Deku x Human!Baku

Complete | 3 Chapters

Rated - Teen & Up

𓇼Collectors Item𓇼 by BeanQueen_29

Summary: Mer!Izuku X Human!Katsuki

It was by chance that Katsuki had caught wind of the markets having collected a creature they coded as a "Sea Naiad" or “Son of Nereid”.

He was just closing in on a deal of his new purchase of one of the rarest fish found in Japan waters; The Elusive Oarfish, otherwise known as ‘Ryugu no tsukai’.

Originally, he only heard the name "Ryugin Decedent" getting thrown around, but after making his investigation of this new rarity of the sea the markets seem fond of keeping hidden, the more intrigued he became. Especially when the names started to become eerily specific.

A Sea Naiad.

They caught merfolk.

And as a collector of Legend-Becoming (going extinct), it would be unwise to not let such an absolute specimen slip through his fingers and into the hands of another greedy buyer.

— — —

Or Katsuki, a man with unbelievably deep pockets, is a collector and a mermaid he later names Izuku is up for purchase. A lot of unexpected developments come between them, and it's more than just simple curiosity and admiration of each-other’s mind. But of the body too.

Incomplete | 3/? Chapters

Rated - Explicit

A completely irresponsible conservation effort by McAlli

Summary: Izuku fucks Mer Katsuki.

That's it. You saw the tags. You know what's in here.

Mer Baku x Human Deku

{One Shot}

Rated - Explicit

[triforceangel13]

A Sea of Green and Red Ch. 21 (A BakuDeku Mermaid Au)

Chapter 21 : A Choice

“This doesn't feel real,” Izuku said softly, running his fingers up against Katsuki's chest slowly. The blonde rubbed his back, staring up at the ceiling made of stone. “I never thought I could have someone in my bed like this.”

Katsuki snorted a bit, turning to kiss Izuku's head as he tried to relax despite his body's floating. It was rather uncomfortable.

“Glad to hear you're feeling a little better,” he said. It had been days since since the battle. The rest of the pirates had been held captive on their ship with nowhere to go, awaiting whatever fate the merpeople decided for them.

Though Katsuki knew that it was also up to himself and Kirishima. Not all of them were bad. There were some that were just following orders and that hated the captain.

But there were a handful that were loyal to the man that they had to weed out.

“Trying to be,” Izuku said softly. “It's a bit of a big adjustment...not having to worry so much about him any longer.”

A shiver went through him and Katsuki tightened his hold around him. That was an image that Katsuki was never going to forget. The sight of the man he used to look up to eaten by a creature of the sea at the hands of the prince.

But now they had other things to take care of. One of them was choosing their fate. What was to become them now?

Katsuki couldn't live in the water and he was sure Izuku couldn't live on land.

It was as if their natures were telling them they had to leave one another. And that thought alone broke Katsuki's heart.

He did wonder if Izuku realized that yet.

“I know,” Katsuki said to him, rubbing his back gently and felt Izuku's body relax against him, his tail coming to lay across his legs, making Katsuki a little more comfortable with the added weight from his tail.

“We should try to sleep,” Izuku said. “We have to rise early tommorrow,” Izuku said. Katsuki leaned in closer and kissed the top of his head.

“Yes we should,” he said to him. “You're still healing.”

“So are you,” Izuku tried to protest but yawned and the sleepiness in his voice had Katsuki knowing the merman was fighting trying not to fall asleep.

He leaned closer, pressing a kiss to his forehead and squeezed him close. Izuku made a small noise meaning Katsuki was winning.

“No fair...” Izuku mumbled to him. Katsuki chuckled and continued to pet him until he heard the soft breathing of him sleeping.

He let out a small sigh, looking up at the stone roof once again. This may very well be the last time that he and Izuku got to sleep next to one another.

It was after the battle. He still had some loose ends to tie up but he kew that the king would have a say in what happened in their relationship.

And it wasn't just them, it was Kirishima and Mina as well.

Not to mention the small baby growing inside of Izuku. After all the stress Katsuki had made sure he had been looked over. So far the baby was at a happy weight and everything was alright.

Surely their baby would play a part in keeping them together. If not...Katsuki wasn't sure if he could live without Izuku.

He was the best thing to ever come into his life. Someone to show him that his way of life was wrong. Someone to show him that even he deserved someone.

Someone to show him that he didn't have to stay the way he was. That he could choose a different path and move on.

That was why he loved Izuku so much and he was not willing to let him go without a fight.

*

Katsuki slowly walked on the deck of his familiar ship. This vessel had been his home for years but now felt vacant and hollow. This wasn't his home anymore. Honestly he didn't know where his home really was anymore. He still had to figure that one out.

Kirishima walked next to him the other crew members standing on either side of them was they waited, their hands bound with rope.

“You all must be wondering what is to come of you now that he is gone,” Katsuki said, looking around them. Usually if the captain fell it would go to the first mate to see through.

But Katsuki didn't want it. He didn't want to be the captain. Quite honestly...he felt like his pirating days were over.

“I'm here to tell you that anyone who belives he should be avenged, step forward,” Katsuki said, watching as a handful of the crew members did. “To the cell with you all. You will be turned in to the main land. They will decided your fate.”

“What? You tricked us?” one growled.

“I only asked who followed him. You exposed yourselves.”

There was protesting but the few mermen that had come up there to help escorted them off. Katsuki looked to the reminaing crew, hands clasped behind his back.

“I know you a lot of you didn't want to fight. A lot of you were simply following orders and feel regret over what happened with the merman named Izuku,” Katsuki stated, noticing the guilty looks over the others as he watched them. “I'm here to give you all a second chance. Take it, and you might become the greatest pirates in the world. Don't, and you either are at the mercy of the ocean or at the mercy of your new captain.”

There were unsure looks at them and one finally spoke up.

“Who is our new captain?” he asked. “We assume it's you but...”

“That would be the case,” Katsuki said. “But I'm not taking it. I've chosen your next captain, one that I'm sure that you will all know well. Captain Kirishima.”

Kirishima smiled and stepped forward, giving a slight bow to the crew. There were hoots and congratulations heard among them.

“And let's not forget,” Katsuki continued, turning to the one hiding in the shadows. She stepped forward, dressed as they would be but looking a little nervous. “Your new first mate Mina.”

“I will do my best,” she said, bowing herself. “Now I believe the captain has the first order of business to take care of?”

Kirishima grinned, taking her hand and kissed her cheek. He then gave a nod to the merfolk standing nearby to release their bounds.

“You are all free,” he said to them. “If you wish to stay, then by all means we will be very happy to have you. But we are not going to force you to stay.”

There was talk among the crew and to Katsuki's surprise all of them chose to stay under their new captain. It warmed the blonde's heart and he leaned against the rail, peeking over to see Izuku smiling up at him.

He gave him a wink and then a thumbs up to show that all was going well.

Now if only this would go well with the king. His meeting with him really was making him nervous but at least he knew his friend was taken care of.

The blonde approached the redhead and pat his back.

“Congrats,” he said. “Don't be a stranger huh?”

“You sure you don't want to stay with us? You know I won't mind you being co captain or something like that,” Kirishima urged.

“Nah, I think I'm done,” Katsuki said. “besides, I've got a whole other fight to try to win against the mermaid king.”

Kirishima pat his back. “Good luck.”

“Thanks, I'll need it,” he said and then climbed onto the rail and jumped from the ship into the waiting waters.

*

The king wouldn't see him. He was far too busy with getting his kingdom back in order and dealing with things in order to decide the fate of a “pathetic” human. But one thing was certain.

If he wasn't seeing him it meant that he had no intentions on letting Izuku leave again. Eveything was as it was.

But it wasn't. Katsuki was in love with him and Izuku was carrying their baby. It was all a mess.

The blonde had gotten so upset that he had swam to the surface and sat on the shore of the nearest island.

The scowl was on his face but he kept his pain hidden. This was his life now. A forbidden love. Something that he was never allowed to have.

He lost his home, he lost his family, he lost his ship and friends, and now he was losing Izuku to a king who refusted to let his people go. He was sure Mina had snuck away.

“Might as well just wither away,” Katsuki grumbled softly, glaring out at the sunset and then sighed, burying his face into his arms as he rest them on his knees. “Let the waves take me away so I don't have to feel...”

“Don't say that,” came Izuku's voice.

Katsuki lifted his head as he looked at him. He bobbed in the water, seeming to be wearing something on his body. His eyes were soft as he gazed at him.

“Why not?” Katsuki asked. “He won't allow you to leave. That much is very clear. I've got nothing left Izuku.”

“That's where you're wrong,” Izuku said softly and started to come out of the water. What Katsuki believe to be his tail were his legs, him walking out of the water in what looked like a shimmering dress of some sort. In his hands he clutched a bag, a gentle smile on his face.

“You have me,” he said. “And you have our baby.”

Katsuki grinned and came running into the water, wrapping his arms around him and hugging him close to his body.

“Yes...yes I do,” he said, pulling away with a small smile on his face. “How did you get him to change his mind?” “I didn't really,” he said with a small laugh. “I reminded him that not all humans are bad and that this is my life, I get to choose it.”

“And your mother?” he asked.

“She's sad but she agrees that I'm allowed to do what I want with my life,” Izuku said. “And it's not like I won't ever visit. We can any time we want.”

The blonde grinned at that, picking Izuku up and twirling him a bit. He set him down on his feet and then pulled im into a deep kiss.

Izuku had chosen land over the sea. He had chosen him over his home and what he knew and loved. He chose to use his legs more than to use his tail.

“I love you, my little merman,” Katsuki said to him as he pulled away. Izuku smiled dreamily up at him, resting his hand on his.

“I love you too my pirate,” Izuku said.

“Ah. Ex pirate now,” he teased. Izuku rolled his eyes.

“Ex pirate,” Izuku agreed and cupped his hand behind his neck, pulling him in for another kiss on the lips.

This was where they both belonged, right beside one another.

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A Sea of Green and Red ch. 19 (A BakuDeku Mermaid Au)

Chapter 19: Solid Ground

Gone were the days of happiness and fun. There was a big battle to prepare for. One that they would very well lose if they weren't careful and didn't trust one another.

There was only two humans on their team but even they they needed all of the mer kingdom to trust them in this battle.

As promised Katsuki had spoken with the king with Kirishima. At first it hadn't gone anywhere but over time they eventually called a truce. They both agreed that the fate of the merpeople was far more important than Katsuki bedding the prince's intended.

But they would speak of it after apparently.

As promised the word was sent out to the kingdom. Those that wished for safety would go to the deep sea caves to hide until word was sent that it was safe. They were upset about leaving their homes but they knew that the caves were much safer.

To Katsuki's surprisedthere were many mermen and mermaids that actually wanted to stay and fight. Most of them were the guards of the kingdom but there were others that weren't that were ready to make a stand against the humans for their home.

The guards showed Katsuki and Kirishima, as well as those who weren't well versesd in the ways of battle, how to fight underwater more fluidly. It was a little more difficult for the humans but they found a basis of what to do and manipulated it to work in their favor.

The water was their grand advantage. If they got them into the water it would make things easier to fight them off.

But that was more than likely where the battle would not be taking place. Katsuki knew his crew and he knew that they did everything they could to not end up in the water whenever there was an altercaton to be had.

That's where his knowledge came in. With Iuzku teaching how to grow their legs, for those that had no idea how, and Katsuki with teaching them human battle techniques. He always warned them to never leave themselves open, to always make sure they were protected.

This crew would fight dirty.

On a suggestion they used kelp leave to press over their mouths. Mina had suggested that even if their kiss was gone they would need to use these to protect themslves just in case one of them was grabbed and forced to kiss.

If anyting they were more than read tof ight. At least that's what Katsuki hoped for. With how Izuku described Shigaraki before he had left he was sure the man was unhinged after not getting what it was he wanted.

At dawn they were ready. They were near the island and the ship was getting close. The merfolk were under the water, waiting.

Their main goal was to bring them in an area where they would have an advantage. In order to do that they would need to take down the ship.

With enough force they could take the ship down.

It hurt Katsuki to think that they would need to take down the ship that was one his home. He had been there when the ship had been first gotten. He had helped take care of it and took pride in it whenever they sailed away with a win.

Now it was just a bitter reminder of his old life and the people that he used to be around. It wasn't as great as he had once thought it was.

“Ready?” Kirishima asked next to him. Katsuki clutched the sword that he had been given. It had seen better days being under water for so long but it was all they had that wasn't made of stone.

“Ready as I'll ever be,” Katsuki said with a scowl, double checking his fire arm. He honestly couldn't wait to see Shigaraki's face when he realized that he was still alive.

And that Kirishima and himself were there to fight for the merfolk.

Izuku popped his head out of the water and swam closer to shore. Despite Katsuki urging him to go to the sea caves with his mother he had refused to go despite being pregnant. He wanted to fight. He wanted to protect his home.

He wanted to see Shigaraki's reign stopped.

“Kacchan!” Izuku called out as he tugged the kelp away from his face. Katsuki waded into the water, resting his hands on his arms.

“Izu, what are you doing? We're about to go into battle,” Katsuki said, worriedly looking at the fast approaching ship.

“I wanted to give you a kiss for good luck,” Izuku said. Katsuki rose a brow. He knew something but he trusted him.

“By all means then,” he said, gently cupping his cheek and guided their lips together in a gentle kiss once more.

Izuku knew. Oh he knew. He knew very well what was happening.

He remembred what they said about them following him. No doubt the captain had his eyes on the forbidden prize. So Izuku was showing him just what he wanted him to see. Giving his kiss once more to the man who deserved it, who was very much alive.

The two of them pulled back slowly and Izuku leaned in to whisper into his ear.

“When this is all over...I want to celebreate privately with you,” he said into his ear. Katsuki felt his skin get warm and he wrapped his arms around his merman.

“You little...” he said with a soft laugh. “You know how to get a man all hot and bothered before a battle hm?”

“You know I do,” Izuku said, leaning back to cup his face. “Just promise me you'll come back to me. That you'll stay safe.”

There was worry in his green eyes. Now that Izuku had shown Katsuki and Kirishima were alive no doubt they would be targets. It was clear on Katsuki's face that he knew.

“I promise,” he said, kissing his palm and then gently pulled the kelp back up onto Izuku's beautiful lips. “You as well.”

Izuku chirped at that in his sign of a promise and then sank back into the water.

Katsuki smirked, heading back to dry land, Kirishima patting his shoulder as they laughed.

*

Shigaraki's hands shook as he stared through his telescope. There was his merman, poking his head out of the water.

And then there was the bane of his existance kissing on him as if he hadn't been on death's door not just weeks prior.

He snapped his telescope shut, storming his way towards the crew that had scattered to the edges of the docks, fearful of his rage.

“You told me he was dead!” Shigaraki roared at them. “I took his life with my own eyes. You left him there to rot!”

“That is what we we said sir,” said one unforunate crew member that ended up getting a shot to the stomach. He doubled over in pain, crumpling to the ground.

“Then someone tell me why he is on the beach with his redheaded nuisance kissing on my merman yet again!” Shigaraki roared.

The crew remained silent, not wanting to witness or experience the same fate as their dying fellow crew member.

Shigaraki threw his telescope onto the deck much like a child. It shattered to pieces and the crew still remained silent.

“Someone bring me his head,” he declared. “And make sure that the merman watches it happen. I want him dead.”

“Yes captain,” they all chimed in.

“And my merman. Bring him to me. By force,” Shigaraki sneered.

*

At first things had been silent. None of the underwater army spoke as the waited for the first strike. And when it came things were quick to action. They dodged bullets and canon balls aimed into the water as fast as they could, swimming to the surface with their spears and arrows and fired away up at them on the ship.

Most they missed at the odd angle the fired but some were luckier than others as well as the firing squad on the beach.

But it wasn't enough. It was becoming hard to dodge and who knew how much arsenal they had gathered at the cove.

Katsuki had been afraid of other crews coming with them but from the looks of it they all thought he was insane back at the cove. They wanted nothing to do with him. Too much trouble to go after one mermaid that may, or may not exist.

Mermaids had been a myth to them that ended up being real. But most pirates didn't bother with myths unless they were truly bored or insane.

Shigaraki had defnitely been insane.

“We need to get up there,” Izuku said, looking up at the ship. “Who's with me?” Several merfolk agreed with Izuku, including Shoto, and a few others that looked to be octopi. Izuku remembred hearing that they had come after helping Shoto.

“To the surface,” Izuku called, leading the group to the surface. Their heads poked out of the water and with some concentration they emerged with their legs. One by one they grabbed hold of the ship, using whatever they could to climb aboard with their weapons in hands.

The pirates were not expecting this at all as they were soon surrounded by merfolk walkng on legs just like them.

“Don't let them ksis you,” Izuku said around his kelp mask as they all agreed and went in for the fight of their lives.

Izuku swung his sword gracefully, dodging attacks like he had been doing this for years. He hadn't but Katsuki was a great teacher.

There was one pirate that he was aiming for and that was the captain. After everything he had put him through Iuzku wanted to be the one to take him down.

“There you are,” growled Shigaraki's voice. Izuku turned around, his eyes hardening as he readied his sword. “Didn't even need to be brought in. You winllingly came on your own. Now be a good little fish and get in your tank. Then we can call this whole thing off.”

He was lying. Of course he was lying. They had other mermen and women that he had the pick of the litte from.

“Never on your life,” Izuku said muffled behind his mask but Shigraki scowled nontheless and pointed his sword at him.

“Then perish.”

*

Katsuki let off another shot from his gun and cursed as nothing came of it.

“We're too far now,” Katsuki growled, picking up his telescope and his eyes widened to see what was going on the ship.

“What's going on?” Kirishiam asked.

Katsuki cursed and gathered up his things, heading towards the boat that the two of them had scrounged up.

“Come on, they got themselves onto the ship. And Izuku is leading the charge,” Katsuki said, not patiently waiting as Kirishima stumbled into the boat and Katsuki started to row.

“Why is he even up there?!” Kirishima asked in panic. “He's pregnant.”

“I don't know, but I'm going to put an end to this once and for all.”

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A Sea of Green and Red ch. 17 (A Bakudeku mermaid au)

Chapter 17: Realizations

“What do you mean you lost him?” Shigaraki asked with a snarl, leaning down to his crew member. The man was under his foot, the captain's sword dug into his shoulder to keep him pinned in place so he couldn't run away.

“I lost track of him. He took a sudden turn and then just disappeared,” the man said with a wince. “Please, I can find him.”

“Silence,” Shigaraki snapped, tugging out his sword and kicked the man away from him, nodding with his head to take him away from him.

To lose his life, to go to the cell who knew. He didn't care at this point.

He needed to find his merman again. He had to follow him to make sure that he knew which direction to take. But for him to suddenly take a turn...

He was on to them. He was trying to lead him away from the direction he had been heading in the first place.

“Clever little runt you are,” Shigaraki said with a smirk. But he didn't think he was that clever. Someone had to be helping him. But who?

The one that had been helping him was dead. Or....that's what he assumed.

“Touya,” Shigaraki said to his new second in command. The man covered in burns approached slowly, a brow raised.

“Yeah?”

“Bakugou's body. You saw to that it was disposed of correctly?” Shigarki asked.

“Disposed of? You told us to just leave him to rot, which was what we did.”

The captain scowled, turning from him and went to the edge of the boat, staring out at the vast ocean before him.

No...he couldn't be. He had made sure of it. He had made sure that he had taken care of that traitorous piece of garbage.

After all the years of trusting him and he turns his back on him just for some fish tail. He played him for a fool.

“There's no way he's alive,” Shigaraki growled. But there was a possibility that another merperson had found him and was helping him. But how would they know he was being followed? They had made sure to stay at a safe distance.

Either way however, he was trying to throw him off the scent. Throw him off the track to be able to move forward. They had kept heading north and he suddenly went east...

“Alert to everyone that we are continuing forward. That is the direction we are going to take to find those freaks of nature. And if we're lucky everyone will get that kiss. We will be the one crew that can breathe underwater and we will be unstoppable.”

“Aye, aye captain,” Touya said, turning to bark orders at the other crew members to get moving once again.

Shigaraki smirked at that, watching as the sails were adusted to head in that direction. They would find those merpeople and they would make sure that they won this.

“You think you're smart little mermaid, but you will be mine again. And this time you will never ever disobey me again,” he said confidnetly.

He started to laugh then, a dry cackle coming from his throat.

The others ignored him as he had his laugh. They never questionsed him, though they were bothered how easily he had gone insane after one encounter with a merman.

*

Izuku woke with a start, lifting his head up from the soft warm chest of his mate. His heart was hammering hard against his chest.

Something was wrong.

He swallowed, looking to the sleeping form next to him and he relaxed a little bit. He shifted closer to snuggle into him, swallowing as he tried to get his racing heart to relax.

He had to try to remain calm. Any super amount of stress could be very bad for their little baby...granted there was one growing inside of him. He just felt like that he was carrying possibly the first mermaid human hybrid child.

But that was not what had woken him. No.. he felt like something was going to happen soon. Something bad.

He stared up at Katsuki for a little bit, eyes trailing over his bare body and settled on the large scar again on his chest. He had nearly lost him. He had thoguht he lost him but by some miracle he had survived such an attack on his body.

He could see the dark circles under his eyes and his skin cracking in places from being in the water so much.

No...he should leave him alone for a little while, not trouble him with some nightmare that he had woken from...one that he even couldn't remember now.

He carefully got up and went to the mouth of the cave, Katsuki's clothes gathered in his fist now that they were dry. He slipped them on, them being much too big, and he slipped out onto the island that the cave had been connected to.

He gazed about around him. They were on the edge of the island, the beach connected to the rock face that they had got comfortable in. The other caves were nearby, each connected to the island as well for any of them to come through.

Though he didn't expect his mother, Shoto, or even Mina to want to gain their legs like he had and take to the sands.

He sat on the edge of the water. He kept himself out of it, not wanting to get Katsuki's clothes wet again, but also so he wasn't tempted to let his tail out again. He hugged his knees and stared out at the water. A breath passed his lips.

He did wonder what his life would be like after all of this mess with the pirates were behind them. He wanted to go home, badly. He wanted to go home after so long.

But then he couldn't take Katsuki with him. The blonde couldn't survive under the water. Just looking at him before really showed him that his delicate human body couldn't handle it.

There was no way for him to change into a merman and breathing underwater only granted him access to his home so much.

It was if the world was telling Izuku that he couldn't have it both ways. He would either have to leave his home to be with Katsuki or he would have to be with Katsuki to be in his home...

He let out a sigh, pressing his face into his legs, letting out a small groan of annoyance at himself. He knew he wanted to be with Katsuki. Maybe he could still visit home?

“Can't sleep either?” came a familiar voice. Izuku lifted his head to see Shoto. The young merman tensed, looking away as the prince actually unsteadily walked closer on human legs with a large piece of cloth to cover himself up.

He hadn't really talked to him since he had...bashed his head with a rock to save Katsuki. He still didn't understand how the two of them had become allies after what had happened between them.

He would tread with caution.

“No...I can't,” Izuku said to him, tensing when the two toned hair prince sat down next to him, staring out at the water as well. “...your highness...I...”

“No need,” Shoto said to him. “I understand why you did it. And honestly it's healed already. You're in love with Katsuki and I have to understand that.”

Izuku shifted a bit, relaxing only a little bit.

“I'm still sorry for hurting you,” Izuku sighed, letting go of his legs and dug his fingers into the sand, feeling the grains run through his fingers.

The two sat in silence for a few moments.

“Why can't you sleep?” he asked the prince softly.

“Just get the feeling that this was all too easy,” Izuku said softly, eyeing the smoky fog that had fallen over the ocean. Something really wasn't right but he couldn't put his fin on it. “Just send me away from home and hopes they turn around?”

“I'll admit I'm a little suspicious too. I thought we'd see something by now,” Shoto said. “We could have made a stand if they tried to catch you again.”

Izuku shiveed and hugged Katsuki's shirt to him a little closer.

“I never want to go back with them....”

“Well I know if any of us can help it, we won't let that happen again,” Shoto said to him and adjusted his legs a bit with a frown. “I don't understand how anyone can walk on these things.”

“It takes practice,” Izuku said with a small smile, noting Shoto's attempt to change the subject but also to get their minds off of the impending doom that was coming for them right about now.

“Show me?” Shoto asked.

“Really? The prince of the mermaid kingdom wants to learn to walk like a human?” Izuku asked. The only reason he was being playfully critical was his father. His father wanted nothing to do with humans and it was also what happned to him left a bitter taste in their mouths.

But Katsuki and Kirishima had showed that it wasn't humans, it was certain humans that were terrible people.

Just like there were terrible merfolk.

“Well I'll be king one day,” Shoto said with a small shrug of his shoulders. “Perhaps we should venture on land, get some protections for us.”

Izuku smiled soflty. There as still a possibility that it could happen to their home but it was a step in the right direction.

“That's amazing Shoto,” Izuku said.

“Well what better way to start than learning to walk and not make a fool of myself,” Shoto said. Izuku stood, dusting off his pants.

“Well rule one is you'll always have to make sure to wear clothes,” Izuku said. “They can't hide their bodies or anything like that.”

“Noted,” Shoto said, holding his hand out to Izuku who took it and helped the prince rise to his feet.

Izuku made sure he was balanced before starting to move about the sand.

“Sand isn't the best to learn on but it's all we have right now,” Izuku said walking around, skipping a little bit and stretching his legs.

He let out a small laugh as Shoto tried to fous in onlyhim not tumbling down.

“Sorry,” he aplogized to the prince. “I got carried away.”

“It's fine,” he said, standing again with his help. “Gotta admit...if I didn't know any better I would think you were actually a human with how well you walk and blend in.”

Izuku paused.

“You do?” he asked.

“I do,” he said.

Izuku looked out at the horizon. That didn't help but it did at the same time. He knew how to walk so well because of Katsuki that he could be seen as a human.

He could live with him.

“Izuku?” Shoto asked, slowly taking steps to walk towards him.

Izuku's eyes had widened as he stared out at the water.

“Did I say something wrong? I'm sorry, I didn't-”

“No,” Izuku said, pointing out to the water. “The ships...they're heading in the direction of home...Shoto, I lead them right to the kingdom.”

Shoto followed his hand and he paled. Sure enough they were close and heading right in the direction of their home.

“We have to warn them,” Izuku said determined.

I’m open for written commissions

want to support? my patreon (triforceangel)

my a03 (triforceangel) as another place to read my fics

[pinkykats-place]

Mermaid AU🧜 mer deku x human baku

AO3 Fanfic Recommendations

BakuDeku

Disclaimers!

None of the stories linked below are mine.

Some contain mature content - read tags.

Art not mine - artist thegirlinthefandom.SG

Note: If you read any of these works and like them please let the author know with a kudos and/or comment!

Something Fishy by 9oz

Summary: Midoriya, a mermaid, ends up on barbarian pirate captain Bakugo's ship and it's not good news (yet).

Complete | 8 Chapters | Mature

Out of these Waters by awkwardtypeos

Summary: (Little Mermaid AU - with a twist)

Izuku realizes that not only did he just fall out of love at that exact moment, but he also realizes that Katsuki Bakugo is the biggest asshole he’s ever met in his entire life. He sold his soul to a sea witch to be with the world’s worst human being. He’s too furious to be sad - so Izuku stands up on his painful legs and slugs Bakugo right in the jaw, hard, and watches him scramble backward clutching at his face, spitting out more curses than Izuku knew to exist in the human language.

Complete | 16 Chapters

Rated - Mature

If the stars could sing by Evilkat23

Summary: There in front of Aizawa was an aquarium the size of the wall, which, given how big and long these walls were, was impressive. The aquarium was back lit by a soft blue back light and fake background of the ocean. Yet, there weren't any fish in this aquarium…

Well…

There was one. Kinda.

There in the aquarium was a mer…boy?

Abandoned | 7 Chapters | Mature

Of Love, Scales, & Fins by orphan_account

Summary: Katsuki Bakugou is doing what he can to rise up in the ranks as a criminal, even if it is wasn't his first choice in life. Of course, he made the mistake of messing with the Shie Hassaikai clan, which landed him in the river to swim with the fishes.

Or, at least that's what he thought. The last thing he remembers before waking on the riverbank is a beautiful face & a soft kiss.

Then, the same man, whom he thought was just a figment of his imagination, shows up at his door, naked aside from his neighbor's garments & telling Katsuki that he's a member of the merfolk! What the fuck?

Complete | 16 Chapters | NSFW

Wish by Darkshadow

Summary: Eight year old Katsuki goes to the beach only to spot the most beautiful creature he has ever seen, can he convince the merman to stay by his side even through times of struggle.

One Shot | Mature Themes | No Smut

I Am No Fisherman's Slave by DanaEliza

Summary: After many failed attempts, captain Bakugo has set sail for an island that mostly certainly has mermaids. A species he has been looking for, for years. But what if instead of finding a mermaid, one has already found them?

7/? Chapters | NSFW

Last Updated Feb 2021

Home is Where the Heart Is by RoboticSpaceCase

Summary: Tricked into working under a strange man as a “treasure hunter”, Katsuki Bakugou finds himself out on a boat, trolling the waters for something interesting. When he accidentally catches a mermaid, Bakugou knows he’s found his way out of his boring job and all of his debt. All he had to do was make it back to shore.

12/18 Chapters | NSFW

Last Updated 2020

Life Amongst The Waves by Skelekitty

Summary: Izuku and Bakugou met as children. Izuku got caught in the currents during a storm out at sea and ended up being washed ashore on a beach. It just so happened that Bakugou was out for a walk early that morning and found him unconscious. He helped Izuku and got him back in the water.

After that they met often in a secret cave to escape the eyes of others around, this went on for a few months, but one day Bakugou stopped coming.

Incomplete | 7/? Chapters | SFW

Last Updated 2019

When you hold me by Serah_chan

Summary: It’s another oil spill, Katsuki’s told. Rescue and containment operatives have been mobilized to save as much life and hold off the growing blotch of sticky death spilling into the bay. Katsuki’s unit gets sent out on boats to set up oil boons. He’s just finished and is getting ready to go switch to life rescue when he spots something hits his small boat. What the fuck? He thinks just before there’s another thud. He rushes to the side to take a look, aware it may be an animal in peril... what he finds instead is an oil slick covered hand reaching out, pressed against the side of the hull.

Complete | 24 Chapters

A Sea of Green and Red by TriforceAngel

Summary: Pirates are terrible, ruthless, taking and hurting others for anything that they want. Or are they?

Taken from his home and his loved one's Izuku must find a way to get back home beneath the waves. Will he have the help to do so? Or will he change his mind to pursue something he had never experienced before?

WIP | 20/? Chapters | mature content

Last Updated May 2024

At An Ocean's Divide by that_enby_nerd

Summary: An AU in which Midoriya is a merman living near the kingdom of the Bakugo family, and a forbidden connection forms between the prince and a knight of the sea.

Incomplete | 12/? CH | Mature

Last Updated May 2022

Series: Pirates and Sirens by BluGemRising

2 Works

[fernandesart]

A captured mermaid curious about the pirate sleeping right next to him

(Edit: what happened before)

[fernandesart]

When you think you just saved a man but you actually just saved a mermaid (aka, what happened before this)

- I made this quick doodle to thank everyone for getting my previous drawing over 500 notes. It may not seem like much, but for a tiny blog like me that is more than I could have ever hoped for. So have some more pirate Bakugo and merman Izuku

[ao3feed-bakudeku]

by s_holdthebus

Izuku Midoriya was once a hero, but a horrific fight with Tomura Shigarki and the League of Villains leaves him dead and at the bottom of the ocean, encased in a stone statue.

Katsuki Bakugou is hot headed mermaid, charged with looking after and cleaning the stone statues that appear every so often in the sanctuary.

The two meet in this strange world, and try to navigate their complicated feelings for each other and themselves.

Words: 3958, Chapters: 2/7, Language: English

Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia

Rating: Mature

Warnings: Graphic Depictions Of Violence, Major Character Death

Categories: M/M

Characters: Midoriya Izuku, Bakugou Katsuki, Shimura Nana, Uraraka Ochako, Shuuzenji Chiyo | Recovery Girl, Shigaraki Tomura | Shimura Tenko, Shigaraki Tomura | Shimura Tenko's Grandmother, League of Villains (My Hero Academia), Deku, Kacchan

Relationships: Bakugou Katsuki/Midoriya Izuku, BakuDeku - Relationship

Additional Tags: bnha - Freeform, mha - Freeform, Blood and Gore, Blood, Blood and Injury, Blood and Violence, Alternate Universe - Soulmates, Soulmates, Romantic Soulmates, Romantic Angst, Sexual Tension, Unresolved Sexual Tension, Gore, Mild Sexual Content, Mild Gore, Mild Language, Explicit Language, Major Character Injury, Injury, Light Angst, Fluff and Angst, Eventual Happy Ending, Character Death, Death, Temporary Character Death, Implied/Referenced Character Death, mermaid bakugou, mermaid, Underwater, Minor Character Death, Purgatory, Manga & Anime, Implied Death, Alternate Universe - Fantasy, Fantasy, Gay, Bisexual Female Character, Alternate Universe - Merpeople, Merpeople, Anxiety, Depressed Midoriya Izuku