#bakudeku mermaid au

[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

[hotpotatopotat]

"The Water's Fine"

Bakugou mer and Deku make it back to their private cave okay, but Bakumer is in the mood for hijinks instead.

[bkdk mer au]

[modharvest]

Sea monster hunter vs “sea monster”

Also childhood friends

[frostnova321]

woah!!! gay people!!! so crazy so silly

(the bnha fics got hands bro i swear i can never leave)

fic’s called Tidal Hearts by @samisnotlegend and @macksmilesback!!! very wonderful go check it out i eat it up every time frfr

[komy-0o]

Mermaid Izuku & Pirate Katsuki 🌊⚓️🫧¡¡

[baronne-buhdussy]

Sometimes, Captain Katsuki takes some time for a break, so he can enjoy the view of his archivist boyfriend having fun with their merman boyfriend, as a treat !

***

And you can get yourself the bigger picture - as treat - just below the cut (Censored with a cute sticker so it can be fully stamped "safe for Tumblr rules" !)

(don't fucking think about flagging me for that tumblr, it's male presenting nipples XD !)

[darkcrowprincess]

Bakudeku fic idea:

Bakudeku mermaid saga au but with some twists and changes. Where Izuku Midoriya a human who was born 500 hundred years ago was forced to eat the skin of a mermaid and become immortal along with his mentor Yagi Toshinori and his mother Inko. His little family travels from place to place managing to deal with the loneliness of immortality better than others because they have each other. All while also staying one step of head of Izuku's evil father All for one who tricked the small family into consuming mermaid flesh. You see mermaid flesh most of the time does not always make you immortal. Sometimes it can turn you into a monster, a lost soul. Izuku even with his family is still rather lonely at times, not really having anyone close to his immortal age. Than one day he meets Bakugo Katsuki, someone was kidnapped and forced to consume mermaid flesh too! He managed to become and immortal just like him. Mayhe they both can become friends and something more to help ease the loneliness. But beware, Bakugo has demons coming after him as well.

[cerise-apple]

“I want an eternal soul.”

At Izuku’s words, Katsuki has to do a double-take.

“A what?”

“An eternal soul,” Izuku repeats. “Like how humans get one after they die.”

Katsuki rolls his eyes.

Izuku looks away.

Katsuki clicks his tongue.

“It’s just the two of us, hanging out here on a beautiful day, and you’re thinking about how you want an eternal soul?”

-merman!bkdk au, read more here-

[ephemeralfuture]

Sooo Im writing bkdk fanfic now and I haven’t advertised a fic on here in literal years since Tumblr went dark so have my Mermaid Girlie style mermaid AU

[pinkykats-place]

BKDK Mermaid AU Mer Bakugo x Human Deku

AO3 SFW Recommendations

Disclaimers!

None of the stories linked below are mine!

All are SFW … still check tags

Credit to @hotpotatopotat for the fan art.

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

Human Treasures by @kaligraphy

Summary: Mina convinces Katsuki to help two humans trapped in their sinking boat in the middle of the storm. Katsuki, for all his claims of disliking humans, seems to find one human rather pretty.

{One Shot}

Rated - Teen & Up

whirlpool by pinchingzuku

Summary: He still didn’t know how he, a mer, ended up being friendly with a human of all things. It still made his brain spin and his fins flicker in annoyance, maybe less than he would have liked, but still.

And definitely didn't expect to see him again, and again, and again.

{One Shot}

Rated - General Audiences

The sound of the waves by Ana_Writes

Summary: Love is beautiful, everyone knows that. Everyone sees it differently. For some it's the feeling, for others it's the person.

For Izuku? For Izuku it's the sound of the waves.

Being in love with a merman isn't normal or easy but Izuku knows he'll do anything to see Katsuki's face, feel his scales on his skin and hear the soft hum of the waves.

{One Shot}

Rated - Teen & Up

tides by kindaopps

Summary: A new lease of life, then, for this poor boy. 

A whim, nothing more. Katsuki’s good deed of the day. It’d be a waste, to let the life he’d saved slip away in a blink of an eye. 

Katsuki ignores the treacherous voice inside him that tells him that his whim had something to do with the dream-like, nebulous future that Katsuki saw in glimpses.

One Shot | SFW

Rated - n/a

Not Your Typical Tail by Cyberneticstar

Summary: The Little Mermaid AU where Bakugou takes the place of Ariel. And he's not falling for any of that 'love at first sight' or 'damsel in distress' bull shark shit.

Complete | 10 Chapters

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.

{One Shot}

Rated - Teen & Up

mer-made in heaven by Fangirl_on_fire

Summary: Over the next few weeks, Izuku kept returning to the cove. He brought a few gifts for Katsuki—slices of dried kelp, a pretty shell, things he had figured out mermaids often liked from his studies at the laboratory—but Katsuki never reacted beyond a slightly interested lift of his eyebrows. Still, Izuku was lucky just to have the attention of the most gorgeous person he had ever seen, mer or human.

As if it weren’t enough that Katsuki was devastatingly handsome, he was cute, too, with the way he scrunched his nose up when the sunlight hit his eyes or he idly splashed his tail in the water.

{One Shot}

Rated - Teen & Up

Tidal Wave by LoonyLoomy

Summary: When a young Izuku goes to the beach one day to find a boy with a lionfish tail, he's immediately enchanted. Katsuki is the coolest friend: confident, talented and bursting with amazing stories about life underwater. Little do the boys realise, however, that a mistake can change everything in the blink of an eye.

Incomplete | 6/? Chapters

Last Updated 2020 

Rated - Teen & Up

[hotpotatopotat]

"Peaku's Dream"

[BKDK Mer AU]

Deku realizes some babies are missing, but Bakugou mer reassures him.

Peaku noticed too, and he's relieved to hear that maybe...just maybe...he doesn't have to leave just yet!

[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.

I’m open for written commissions

want to support? my patreon (triforceangel)

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

[ao3feed-izch]

Bloodstained Love

by Dragonshade

Toga/Ocha main  background post-Izuocha,Kamijirou,BakuDeku,SerorokiMomo,

Izuku and Ochako are struggling in their relationship and their friends are hoping a beach vacation is just what they need, but danger lurks in the water and Ochako's not sure she wants to run away.

Words: 7669, Chapters: 1/1, Language: English

Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)

Rating: Teen And Up Audiences

Warnings: Creator Chose Not To Use Archive Warnings

Categories: F/F

Characters: Toga Himiko, Uraraka Ochako, Midoriya Izuku, Bakugou Katsuki, Jirou Kyouka, Kaminari Denki

Relationships: Toga Himiko/Uraraka Ochako, Midoriya Izuku/Uraraka Ochako, Bakugou Katsuki/Midoriya Izuku, Jirou Kyouka/Kaminari Denki

Additional Tags: Initial DekuOcha, Implied Cheating, AU Siren Toga, AU Siren Jirou, Togachako Main, Blood and Injury, human/mermaid romance, Background Kamijirou - Freeform, Brief Dabi cameo - Freeform

source: https://archiveofourown.org/works/58815097

[zscyber]

Final Chapter of 'Not Your Typical Tail' - Coming Together - Is Now Up!

Chapter summary:

Himiko's plans may have all sunk so far, but she refuses to let this last part be buried under the sea floor. Izuku, on the other fin, is determined to save Katsuki.

AO3 link:

Once again, I want to thank @silverberry-snails for letting me use their BK-as-the-Disney-princess idea.

I hope all readers enjoyed the story!