#toxic seahorse | Explore Tumblr Posts and Blogs

restwellsoon · 2 years

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Sea Foam on Your Skin

Pairing: Jason Todd x F!Reader

Summary: You’re haunted by the aching lament of a siren’s song. Jason is mourning the loss of his tail. The two of you find comfort in each other’s company.

Content warning: Siren AU, monsterfucking, Tentatodd, tentacles, smut, hurt/comfort, angst, body horror

Minors & Ageless blogs DO NOT interact!

There were two origins of sirens that have been passed down for years by the people of Gotham City.

They were beings as old as time, descendants of Atlantis whose magic had depleted with each generation until the only magic left in them was in their form and their song.

The other origin was that they were the by-product of pollution and toxic waste from Ace Chemicals. Poor workers often lived close to the facility and as the company grew, so did their exposure to the hazard chemicals. A lot of lonely men lived on company grounds, some that were mockingly called fishfuckers.

Your eyes bulged at the word, making you question if you were truly reading an academic article instead of some amateur piece on the internet. “Fishfuckers,” you snorted. You were certain that the author was pleased that that word made it through editing.

Sirens were the children of these men, mystical beings that were more beautiful in story than reality. But there was no way to confirm this as the story was only passed on by word of mouth, the article ended. You were certain that any records would have been destroyed as well lest that nickname haunt them and their families for years to come.

Most people, both sirens and humans, chose to accept the first account as their origin.

---

Jason couldn’t remember much of his life before his current state. He was an unwanted child, found on the edges of his underwater city, cradled in rotting seaweed and trash that had sunken down from the surface.

Thus as an orphan, he relied on stealing to survive, interacting more with shady humans than sirens. It served him well for most of his life until his early teens when he was eventually caught. He knew he could only survive like that for so long.

He should have known better than to steal Bruce Wayne’s prized black seahorse but it was practically asking to be stolen, tied to a crumbling spire of coral in the aptly named area known as Crime Trench, with no one else in sight. Jason knew it would go for a high price as well. Bruce was known for breeding them to be strong and fast.

It was only natural that he was caught as the reins were undone, the rope still fisted in his hands as his city’s law and order loomed over him.

The price to pay for stealing would be one lopped off hand. And for Bruce’s prized seahorse? Probably both.

But instead of taking a sword to either, the imposing siren took him in, letting out a low rumble of laughter that let out a series of bubbles as Jason eyed the dinner that was prepared just for him suspiciously.

Thus marked the beginning of Jason’s life of comfort. As Bruce’s ward and later adopted son, he was provided with opportunities he could never dream of having as a street urchin. Alfred, the butler, took to providing Jason with an education, often assigning stacks of novels to read, which he spent time pouring over until he had to borrow the bioluminescence of some algae.

A few times a week, he was given lessons on etiquette and business. Like his first son, Bruce was preparing Jason to watch over one of the many neighborhoods of their city as well as deal with any of the city’s politics. Despite the mystery that shrouded them, certain humans knew of the existence of sirens. Slowly over the years, Bruce introduced Jason to these individuals who were key to helping them live peacefully. But it seemed that Jason would get distracted by other humans whenever they went to the surface.

As grateful for Bruce and Alfred’s kindness as he was, Jason’s curiosity got the worst of him as the years went on. He’d been around humans before, oftentimes trading whatever he could scrape up in exchange for gold and food. But it seemed like after he turned of age, his curiosity towards humans turned sexual.

Sirens procreated similarly to fish with females laying eggs and males fertilizing them. Sexual pleasure was derived from kissing and touching the erogenous zones on their upper bodies.

Humans though were strikingly different. Their long legs helped balance them on land and propelled them through the water as they swam in the sea. At first it was scientific curiosity that made Jason wonder where their parts were. Where did the eggs come from? How would they get fertilized?

He found his eyes wandering towards their anatomy, later learning that their sexual organs lay between their legs from an old book that lay cast aside in Bruce’s library. Their parts were obscured by cloth whenever they swam in the ocean but if he looked underwater, he could make out the outlines of their shapes. There was usually flesh on their backside. Male-presenting humans had bulges that came in various sizes in the front. The females were smoother, making it harder to discern. It only made Jason more curious of what lay hidden beneath.

---

“He’s grown from a boy into a man,” Alfred said, writing off Jason’s behavior.

It wasn’t as if Jason’s performance at the latest meeting between the land councilmen and them went wrong. It actually went better than planned and he was proud of his son for securing a deal that they’ve been going back and forth on with negotiations.

No, he was just concerned about how much time he spent spying on the surface after these meetings. He saw the contents of the books he read too.

“It’s normal for a father to worry about his son.”

Alfred gave Bruce a look of disbelief.

“I believe you should worry about your own interest in a certain cat before you worry about your son’s interest in humans.”

---

Jason laid in his bed frustrated. The soft sands felt irritating to his skin. Even the finest seaweed that wrapped around him felt suffocating instead of luxurious, their light touches against his skin only lending to his frustration further.

Casting the seaweed aside, he ran his hands across his chest, trying to imagine what a human touch would feel like, how their lips would feel against his skin. He imagined what they would taste like, what kind of faces they would make as he kissed up from their feet to their legs, taking whatever was in-between them in his mouth.

Squeezing his pecs together, each hand latched on to a nipple, rolling the bud between his fingers before pinching and pulling them. He couldn’t even think of the prettiest siren if he tried, his thoughts focused on those damn humans and their fucking legs. He even had to go so far as shoving a fist in his mouth to muffle his moans as he pictured what they would like with their knees bent and tucked into their chest, how their legs would feel tossed onto his broad shoulders or wrapped around his waist.

As much as he grazed, pinched and prodded his sensitive spots, he couldn’t find the release he wanted, touching again and again to no relief.

If only he had legs and what lay between them.

---

While running an errand for Alfred, Jason bumped into a woman at the market. Helping her gather her things which had fallen, he couldn’t help but feel something familiar as he spoke to her.

Before he got the chance to ask if they knew each other, another siren passing by commented on the pair.

“It’s so sweet that you still go shopping with your mother,” they said. “Have a good day!”

Jason looked at her more closely. They were right. She did look like him.

After thanking him, she looked around before speaking to him softly. “I know about your secret.” She placed something small and hard in his hands.

As she moved back, she laughed at Jason’s guarded behavior, body stiff and eyes narrowing at her sharply.

“A mother, despite how long they’ve been separated, always knows what her child wants. And for you, Jason? You want to live on the surface. It’s only natural since you’re half-human anyway.”

With that, she swam away, leaving Jason stunned with her information. He made a move to chase her, but the merchant he needed to meet already called out to him.

He looked down at the object in his hand. It was a tablet, about three-fourths the size of his palm.

If you want answers, meet me at the abandoned ship on the next new moon.

-Sheila

---

It was two weeks too long for the new moon to arrive. Jason’s head felt heavy and dizzy with the weight of her words as he reached the ship. All of the feelings that he moved past -abandonment, loneliness, confusion and anger- returned. He wanted, he needed, he demanded answers.

Where was she all his life? What happened to his father? Why does he look like a normal siren? How was he even born? Was it because he was half-human that he longed for the land? Did that explain his urges?

Jason saw Sheila by the entrance, her hand glowing a soft white as she ushered him inside. She must still have some magic in her, he thought. Jason wondered if there was any magic in him.

She surveyed the area as he followed her in, similarly to how she did at the market. He doubted she could see anything past the glow of her hand. The new moon was when the sea was at its darkest. Even he had trouble finding the place, using the lowest luminosity algae to guide him so that he wouldn’t draw suspicion to himself.

She evaded all of the questions he asked about who she was and where she’d been. They passed by two rooms before she stopped before a door that was hanging by its hinges.

The siren let down her hair, the dark locks curling around her as she presented an elaborate bracelet made of scales. It was common for the mother to keep a scale or two of her children. Scales were unique to each siren, both in color and size. They looked black but as she intensified the luminosity on her hands, Jason could tell they were actually a very deep and rich red. The same color scales that he had on his tail.

Seeing the look of realization on his face and the way his features softened, she spoke with a gentle smile on her lips.

“We’ll have more time to talk about the past. Let’s talk about the present and future for now. I know you want to live on the land.”

Jason looked at his mother with uncertainty. There were rumors of powerful sea witches who could grant legs to sirens. The rumors were as fantastic as being able to transform sirens into humans for a night.

It was obvious that she was practiced in using magic to some degree but he still didn’t trust her powers. Years of being tricked by cruel humans and Bruce’s own paranoia towards magic made him suspicious of others, even if they were related by blood.

Sheila pointed towards the cut on his forearm- the result of sword practice with Alfred.

“Let me heal you,” she offered.

Sticking his arm out hesitantly, Sheila hovered her left hand on it, her hand glowing a shocking green instead of white. Jason winced as the light grew brighter, expecting something blinding or painful. Instead he felt a gentle warmth wash over the limb until her hand faded back to that dull white luminescence.

Turning his arm at every angle to inspect it, Sheila laughed. “Do you believe in my magic now?”

Jason hummed as he poked where the cut was, then smoothed two fingers over it, the skin soft as if it was never marred. There wasn’t even a scar as an indication it was there. It was as if it never existed.

“You asked me why I left you, why I abandoned you,” Sheila reiterated, motioning for him to come into the room. “I want us both to live as humans. It’s not safe for us to live in the sea anymore. Someone is after me and after you.”

As much as Jason wanted to live with humans, Sheila’s plan seemed too good to be true. How could they be certain that whoever was intended to harm them would stop at the surface?

“Bruce can help us,” he insisted.

She clicked her tongue, a look of annoyance and disgust missed by Jason as she adjusted the light from her hands. “Do you really feel at home here? Do you feel at home with that man?”

Jason answered with certainty. “I do.”

Despite his answer, she was persistent. “Try it for a day and see, my sweet child. Maybe that will change your mind. I’ll do it with you if you’re nervous. I have a lot of contacts in the human world.”

He held his tongue to say that he and Bruce did too, though his contacts were more questionable.

“It’s more fascinating to see the city up close and walk its streets instead of viewing it from the fringes.”

Jason thought about her suggestion and he thought about everything he’s read, from human society to the sea witches’ lore. His tail twisted with uncertainty.

It’s not like these powerful sirens were inherently evil. It’s just that they’ve become so rare in their society that nearly anything involving magic made the average siren uncomfortable. But this might be his only chance. If anything, he could do it for just one day to sate his curiosity.

“...I’ll do it. But only for one night.”

She smiled, telling him to follow her to another part of the ship on a lower floor. By the looks of it, it was the captain’s quarters, somehow nicer than the rest of the ship though still dilapidated.

The door closed loudly behind them and Jason felt his skin prickle as if he just swam over a deep trench. In the corner a dark being emerged. It was a set up.

Jason turned to flee the room but Sheila seemed to cast a spell in, the perimeter glowing an eerie purple. Despite how hard Jason pounded on the wood, something that should have broken easily, it didn’t budge.

She touched his arm gently to coax him to stop but Jason pulled away, breathing out a held breath as he tried not to panic.

“This must be another one of your spells, witch,” he accused as he felt his body comply with her commands against his will. He laid in the middle of the room, cradled in his mother’s like a small babe.

“I need the help of another sea witch to transform myself,” she tried to reassure him, as if Jason still cared and trusted her despite her actions. She took her hand in his like a child that needed soothing.

“Close your eyes and relax, my sweet boy. This will be over soon.”

Sheila’s words weren’t comforting. They were immersed with sadness yet not enough to let him go.

It seemed her hold on him weakened as she let out a sob, enough for Jason to turn his head and look at the being that turned from shadows into form.

The mysterious siren looked ghastly and pale with hair like bright algae. His teeth were rotten and his grin nearly took up his entire face. His scales flashed a duochrome of purple and green.

He looked at Jason’s terrified face and laughed, leaning in closely as if he wanted to taste his fear. Jason’s face contorted as if he was about to wretch, the scent of something foul and rotting invading his nostrils.

The siren drew back, speaking more to himself than Jason while his mother wept. “Oh, this is going to be fun.”

The last thing Jason saw was a bright light as he heard his mother whispering one last time that she was sorry.

---

Bruce pulled on the reins to slow his steed down, giving it a grateful pat as he slid off, eyes already analyzing the scene of the explosion. He didn’t bother asking Dick and Jason to help him so late at night. Though they wanted to help in his effort to slow crime in their city, he never wanted to force this burden on them. They were young men leading their own lives. He wanted them to enjoy it.

As he searched the surrounding area, he found a siren, bruised and battered, nursing her ribs against the remnants of the ship’s deck. She must be one of the victims.

He approached her cautiously, arms raised to show that he wouldn’t harm her. When he was close enough, he asked gently, “What happened here?”

The siren extended her palm out to Bruce. He observed it with a sinking feeling in his stomach. She held a torn piece of skin and scales in her hand. At first he wanted to believe that the scales’ color was due to blood staining -even pulling out the most luminous algae he had in his pouch- but the longer he looked at it, the harder it was to deny. They were Jason’s scales.

Bruce cleared his throat, trying to swallow down the panic that set in. When she didn’t answer what happened the first time, he couldn’t help but raise his voice when he repeated himself.

By the third time, he grabbed her by the shoulders to shake her out of her shock, his voice cracking as he asked, “What happened? Tell me. Tell. Me. That’s my son’s scales… That’s my son!”

He grew impatient as he listened to her story. A sea witch took her captive and Jason was trying to save her. She regretted dragging him into her business. He seemed like such a brave and sweet young man.

When he questioned her about a possible motive for the sea witch, she described him as having a cruel sense of humor.

Bruce felt his blood run cold when she told him, “He knew you wouldn’t find any of this funny.”

Bruce knew who did this to Jason.

---

Jason wasn’t sure of how long it was since he’s been out. It could have been days or weeks but he was in a strange part of the ocean that he had never been to, leaving him disoriented. He must have drifted on a current after the blast.

He looked at his surroundings. It was dark but it must have been a place where humans lived before. Concrete laid in piles of rubble so old that the undercurrent beat their shapes, almost making them blend with the coral.

That’s when Jason felt the weight of something on his lower half. Suddenly the rubble that surrounded him seemed far too close and encasing. The feeling was so suffocating that he felt if he took in a breath, he might drown. With a sickening feeling he knew that his tail was most likely crushed and he would be trapped there.

Yet as he looked down, his eyes adjusted to the dark, he saw that he didn’t have a tail but eight tentacled legs instead. They looked like writhing eels beneath the rock but he could feel each appendage. He wanted to gag. His beautiful tail was gone and replaced with something hideous and disgusting.

Despite his repulsion, it was with instinct that he used his legs to manipulate the rock and free himself, squeezing through a tiny passage to leave his rubbled tomb.

He swam for hours without stopping, first upwards to reach the surface, then as his head spied the upper world, he determined that it would be best to swim as far away from his former home as possible.

Hours later he reached a cove that seemed desolate enough. It was nothing that he recognized from his previous travels to the surface.

He threw his body across a flat rock, his lower half still submerged. As his body laid there, exhausted beyond belief, it was then that he was overcome with sickness yet finding himself unable to puke.

What happened to him had finally settled in his mind and into his bones. His mother’s reunion and betrayal. The sea witch’s stench. His stupid fucking wish.

His mind wandered to Bruce and Alfred, even Dick, that annoying bastard of a brother. As he thought about them he wept, overcome with shame. How could he have trusted someone who never cared for him, someone who abandoned him, when he had a loving family by his side all along?

He knew he couldn’t go back to them, not like this, not after his immense act of selfishness. He looked down at his bottom half, eight tentacles writhing under the water. He wasn’t even a siren anymore.

---

Jason adjusted to his new life as well as he could, finding it easy to get back into the habit of scavenging the sea floor for his own food and taking shelter in the cove when he grew tired. He still couldn’t bear to look at his lower half since that first day and often thought of his tail.

Losing his tail reminded him of all that he lost. His status. His family. Himself. Was he even considered a siren without it? What would his family think? Did they still think of him as much as he thought about them?

His existence was lonely. He grudgingly accepted that though he was used to being alone, he missed the company of his family. He missed any kind of interaction really.

After another month of deliberation, he ventured out from the safety of the cove, further south where he sometimes saw boats pass by. He hoped that human watching would be enough to quell his loneliness.

---

His new body was as fast as his tail, if not faster he determined. He practiced swimming laps for hours then moved on to greater distances. His tentacles had the added benefit of being able to grab things too.

This isn’t too bad, he thought.

Jason settled onto his rock after another day of training. He would find that sea witch that did this to him, even if it killed him.

His eyes stared at the ceiling of the cove then moved upwards. He had an idea.

He only ever practiced his grip on catching prey and launching himself from reef to reef. But his tentacles could theoretically allow him to climb to points he never could with a tail.

It took weeks of practice -apparently they moved differently in the air compared to water- but he finally did it. He let out a triumphant holler that echoed as he looked down at the little bay from his new vantage point.

As awestruck as he was though, he felt himself shiver from the tips of his tentacles to the top of his head. Perhaps now would be a good time to go back into the water. He didn’t want to overdo it.

---

The next few months were spent on building up his strength and coordination to walk on land after he mastered climbing. He started at one end of the small strip of beach at the back of the cave. Jason was clumsy at first with all of his legs tripping over each other but with patience and determination, he was able to walk from one edge to the other.

He cried when he finished his first lap, collapsing backwards onto the sand. He looked at the maroon tentacles below him, throbbing from holding his weight up for so long and inching towards the water.

It was with bitterness that he thought that Shiela and the sea witch kept their promise. Jason had legs to walk on land.

---

You’ve always felt that you didn’t belong here. Your heart was with the sea. You remembered the stories about sirens and Atlantis that your grandmother told you about, keeping them close to your heart after she passed and you got older.

In Gotham there was the occasional sighting. The men from the docks would sometimes claim that they would hear a siren’s song in the early hours of the day.

It was still early in the morning as you beach combed where the old Kane Chemicals used to be. It’s been about 200 years since its last use. It was funny how the site of the infamous pharmaceutical company -now known as Ace Chemicals- looked. It was the size of a moderately sized single family house, nothing in comparison to its current facility.

With some work, it would actually make a wonderful home, you thought, the foreclosure sign at its front in your line of sight. The tunnel that was used to dump chemicals into the ocean was sawed up by some hooligans a few years ago, essentially turning it into a slide that connected the small facility to the ocean.

Pausing for a moment to admire a pearlescent shell, you were distracted by the sound of a man singing.

His voice was deep and haunting. You couldn’t make out the exact words but from the tone, the song was sad. You felt drawn to it, ignoring the voice in your head that reminded you that this was how sailors died.

The song led you to the tide pools. Though the voice was beautiful, you were surprised to see that its owner was equally alluring. You could only see his upper body -he was resting on the edge where it met deeper parts of the ocean- but it was well-built with broad shoulders and defined arms. His skin was tanned and his dark locks curly.

“Your song is beautiful,” you commented.

Jason looked up, startled that he didn’t hear the sound of someone approaching him. He blamed it on the waves.

It was his first time interacting with someone -let alone a human- since his transformation. Was it several months or a year since he’s last spoken to someone? His legs spread across the floor, making him sink lower.

The man peered at you cautiously and you kept your distance out of respect.

“I’m surprised you’re here,” you said. “You must be a good swimmer, but you should be careful around these parts. It’s pretty dangerous here. There’s a few riptides and this place is pretty desolate. It would be awful if something happened to you.”

Jason mumbled a thanks.

His speaking voice was just as lovely as his singing one, you thought.

You introduced yourself and found out that the mystery singer’s name was Jason.

“Mind if I join you?”

He hesitated, remembering what happened the last time he trusted someone. Ultimately though, he consented. He could finally learn about humans directly instead of through observation. If worse came to worst, he knew how weak humans were. To a siren, they were as harmless as sea turtles.

He watched as you rolled up your pants legs to dip your feet in the water, still keeping a distance of about four feet until he seemed more comfortable around you. You could feel him staring but chalked it up to his distrust.

Jason swallowed discreetly as he looked up and down the length of your legs, noisily splashing water about you as you dipped your feet into the pool. He felt a surge of embarrassment as you caught him staring.

“The water’s normally so clear here. It’s weird that it’s darker and murkier than usual,” you said as you dipped your body closer to the water to investigate.

Adding to his embarrassment, Jason realized that he must have expelled some ink while looking at you.

A beep from your phone pulled you away from your thoughts and as you read your text, you told him you had to go. Something came up at work.

Jason looked at you curiously, all apprehension gone. “What’s that?”

You looked at him strangely, pointing towards the object. “A phone, duh.”

“Right.”

You gave him another look before laughing. “You’re funny, you know that? Well, maybe I’ll see you around. Thanks for the concert.”

Fishing the shell you were admiring before he distracted you out of your pocket, you tossed it to him. Jason caught it easily. You glanced quickly past him so your eyes wouldn’t linger too long on that sculpted chest.

“A token of my appreciation.” You smiled, “Maybe next time you can take a request?”

---

“Don’t you have anything better to do?” Jason asked, irritated that he saw you again so shortly after your first encounter. It seemed like his quiet escape away from his home would be disturbed if you turned this into a habit.

Your eyebrow shot up questioningly. “Shouldn’t I be asking you the same thing?”

He scoffed, not having anything to say without revealing his true form. Despite your friendly disposition, you knew your boundaries and sensed when you were invading his private space or asking too personal of a question.

“Besides, I told you that I liked your voice. Your songs sound very pretty.”

Jason gave you a little ‘hmph’ before adding, “Of course they are.”

“But they always sound so sad,” you commented. “You don’t have to explain anything if you don’t want to. You don’t even have to sing, really. I just… wanted another chance to hear it. If you’re hurting, I’ll listen.”

His eyes narrowed at your concern before he turned around so that his back was towards you.

Standing awkwardly and trying to decide if you should apologize, the waves crashed against the rocks before another sound took over. You stood in place as you were entranced by Jason’s song.

---

“If you’re not from here, where are you from?” You asked after a few weeks of meeting up with Jason. You were fortunate enough that part of your job was surveying the Gotham shoreline so you could visit the man often.

He paused before choosing his words carefully. “I’m not from here. Lived on the streets for most of my life.”

You always assumed that he must have been a runaway of some sort based on his questions about basic technology and when he told you that he didn’t go to school.

You tried to put on a positive spin on his words. “And now here you are, living off the land like a wild man. You’re honestly living my dream life,” you told him. “I wish I could swim and sing all day though I’m definitely not as good of a singer as you are.”

Jason gave you an amused hum.

“I always wished I could just leave my life and become a mermaid. I never felt like I belonged here. I’d trade my legs for a beautiful tail in a heartbeat,” you confessed.

It was true. You never felt like you belonged in the gloomy hustle and bustle of Gotham City. Even when you went to college in a different state, you didn’t feel at ease there either. The only place where you felt like you truly belonged was in the ocean. The ocean reminded you of unconditional love. It reminded you of your grandmother.

Jason couldn’t help but laugh at the irony. If only he could warn you about the dangers of having such a foolish wish. But it seemed like humans and sirens had similar dreams to live lives they weren’t meant to have.

---

“Maybe you should sing something happy for once,” you told him, voice a little louder to beat the crashing of ocean waves. Jason still wasn’t completely comfortable around you so you were still farther from him than you would have liked.

His songs sounded beautiful but your heart couldn’t help but ache as tales of melancholy and loss drifted in the air. Those pale blue eyes always looked so pained as he sang. You liked it better when his eyes sparkled with a mischievous glint whenever he retorted with a cheeky comment.

Jason looked up at you from that ledge of rock that he made his own. “I’m not happy though so what’s the point?”

You didn’t let the conversation pause lest you wanted it to tread into awkward silence. Jokingly, you placed a hand over your heart and told him that you’re hurt.

“Surely you must have found some sort of happiness in our little meetings. You agree every time and you even get here early.”

He didn’t appreciate your teasing, scoffing at it. “I’m only doing you a favor since it seems like you have nothing better to do than to take long walks on the beach.”

“Hah. Sounds like you found my dating profile. Please tell me you swiped right at least.”

Jason only blinked at you in return, making you wonder just how sheltered the man was. But you supposed that if he didn’t know what a cellphone was and spent most of his life traveling, he definitely wouldn’t know what a dating app was.

You sighed before taking your phone out of your pocket, hoping he wouldn’t be an ass and splash it.

You scooted closer to him but held the phone at a distance, just enough so he could read the screen.

I like taking long walks on the beach and getting paid for it.

Your name, age and Gotham City were displayed below it.

You set it aside, changing the subject. “You must have a lot of free time too. You’re always swimming in the ocean. I bet your lower half is chronically pruny.”

He rolled his eyes before he scooped up a bit of water to splash at you. Not one to back down from a challenge, you splashed him back, starting a war that ended with you both soaking wet.

It even got to the point where Jason lifted himself out of the water a bit and you saw a peak of dark red around hips but the salt water in your eye prevented you from getting a closer look.

“You owe me,” you said, wringing out your shirt. “I gotta go back to work in an hour smelling like the sea and being cold.”

“....Better yet, I’ll tell you what I want from you. Maybe we can go for a long walk on the beach together.”

It was a bold move but you were certain that Jason had to have some kind of feelings for you. You saw it in the way his eyes sparkled as he talked about his favorite books or asked to borrow yours. He remembered the little things you shared with him about your childhood.

But you weren’t as certain as the silence grew.

Jason sighed. “There’s something you should know about me.”

You watched the ripple of biceps and triceps working in conjunction to lift himself out of the water. You realized what it was that he wanted you to know as you saw eight long tentacles splay across the jagged rock. You already suspected that he was tall but like this, he towered over you.

“I’m a-” monster, Jason was going to say before you cut him off.

“Siren,” you finished in disbelief.

An actual siren stood before you in all of his half-man and sea-bodied glory. You stared at him with glowing satisfaction and a more childish you wanted to rub this moment in the faces of all those who doubted their existence.

With uninhibited excitement, you reached out and grabbed the nearest appendage to shake his… hand? Leg? Tentacle?

“Nice to meet you. Or I guess to finally see all of you!”

Jason didn’t match your enthusiasm, looking uncomfortable again.

“...Or not?”

He blushed a shade of pink that made his tanned cheeks glow. He hoped he wouldn’t get ink everywhere.

“You’re shaking my…”

Mating arm sounded too lewd, hectocotylus too scientific. He tried to think of what humans called it in the books that he read.

“Cock?”

You choked. His what?

Looking down at the appendage you held, you realized that you were indeed gripping his hectocotylus, marked by the fat arrowed tip and ribbed section near the bottom. The underside was grooved differently compared to the other tentacles.

You dropped it immediately and apologized, spitting out that you had to go.

“Next week, same time!” You called out from over your shoulder. That should be enough time for you to cool down.

---

Jason retreated to his cave, thinking about the way you touched him earlier. He didn’t know what it was at first either, only finding out by pure accident after massaging it after he spent too long practicing how to walk.

He noticed that one leg felt more pleasurable than the rest and that it looked different too. It was only out of curiosity that he stroked it. Then he touched it again. And again. It led to a sensation he could never achieve when he had a tail. He finally found release.

This time he found himself touching the tentacle intentionally, trying to mimic the firm way you grasped it. His hands were too large, too strong, and he had to loosen his grip. He closed his eyes as he leaned against a rock, imagining that it was your hands that were stroking it instead.

How long had it been since he touched himself to a human? Surely it was before he turned into this. But it wasn’t the same as before where he’d think of any human he observed for the day, no.

Jason thought of you. The way that pretty mouth of yours smiled at him and called his name. The lines of your figure. He thought of your legs spread and in other positions. He thought of marking them with his kisses. He thought of binding them together.

Jason thought of everything about you, stroking and squeezing his cock and caressing his body until finally he came, copious amounts of cum leaking onto his stomach and hand, his breath ragged and your name still heavy on his lips.

---

He waited for you at your spot again the next day though you didn’t agree on meeting. He sat closer to the beach in a different tide pool, the shallower basin exposing his tentacles. The other creatures scurried away from him, leaving the area all to himself. He wondered if this was what it was like to bathe in a tub.

As more time passed, he grew anxious, lost in his thoughts. You had no reason to come so why should he be expecting you? You were probably just being polite by telling him that you would see him in a week, maybe hoping that he would forget about your date and you could just disappear.

He read the myths about the Kraken and stories like 20,000 Leagues Under the Sea. When he was a siren, he might have had a chance with you. But people feared octopi, which was why they were often the villains in humans’ stories.

The grind of feet walking on sand moved Jason out of his thoughts. He looked up to see you standing a ways away from him.

With a basket in your hand and a blanket tucked under the other, you shyly called out to him. The weather was nice so you wore a sundress, exposing your legs. He tried not to look at them, knowing he might expose himself with ink if his eyes lingered any longer.

You took a few cautious steps, gauging his reaction to you before deciding it was acceptable to come closer.

The usual chipperness in your voice wasn’t there, replaced by a faker saccharine that hid your anxiety.

“After what happened yesterday, I stayed up all night thinking of what to do. I actually didn’t think you would be here today.”

“I thought that maybe I should bring the date to you since you can’t actually walk with me.”

You scratched the back of your head, now sheepish, realizing that he never actually agreed to any of this.

You read news articles and heard stories about octopi escaping from their tanks in aquariums and being able to walk for almost half an hour on land. You wondered if Jason could do the same before you shook your head, thinking yourself silly. He was a siren. You were certain that things worked differently for them.

At that, Jason’s chest puffed up with pride. “Of course I can. Who do you think I am?”

With that, he rose from the tide pool similarly to yesterday, this time walking towards you. His steps were graceful, moreso gliding rather than walking. He reached you quickly.

Craning your neck upwards, you figured he was at least a head and half to two heads taller than you. He didn’t seem tired from walking either, his breath even as if he walked on land often.

Letting out a whistle of appreciation and then an applause, you jokingly asked him what he couldn’t do.

All the nervousness and apprehension he felt about showing you his body melted away as he felt for the first time since he changed that he could accept his new body.

---

Knowing who Jason really was, you couldn’t help but ask him all the questions that you’ve been dying to know, wanting to confirm with him if that was really what sirens and their society were like.

In turn, he asked you about the human world. Surprisingly, his amount of knowledge was more accurate compared to yours.

One thing kept on bothering you as the two of you spent another morning talking until the sun was high in the sky.

“When I was a siren-”

There it was again. Was.

You interrupted him. “You still are. You’re a siren, Jason.”

He blinked back at you, processing what you said.

“No, I’m not.”

“Why not?” You challenged him. “From a human’s point-of-view, you’re most definitely a siren! Your upper half is human, the bottom a creature of the sea. You have a beautiful voice. You’re incredibly handsome.” You said the last part quickly, still a bit shy about how bold you were being about your feelings towards him.

“But my tail,” Jason argued. The only creatures he knew that had bodies like this were actual octopi or sea witches.

“So what about your tail?” You argued back. “That doesn’t change who you are inside. Your body might be different from before but you’re still a siren at heart.”

---

Jason sulked in the deeper waters of his cove, your conversation still replaying in his head.

It wasn’t that he truly believed that his tail made him a siren. It was that every time he looked at his legs, his eight long, tentacled legs, he saw a monster. They represented his greed and selfishness, his lust, his shame.

But after talking to you, it seemed that he was the only one who saw himself that way. He really wasn’t as terrible as he believed himself to be. He wondered if his family would feel the same way as you if they saw him now.

Thinking about them made his heart hurt. He wasn’t ready to face them, not yet at least. He distracted himself with other thoughts and each of them led him to you.

Jason didn’t hold you in the same regard he held other humans. He was curious about you on an individual level in a way he never felt towards other sirens. He wanted to know more about you, your past, your dreams. He wanted to know what you liked and what you hated. He wanted to know if you felt the same way in your heart about him as he did for you.

---

Summer on the East Coast meant humidity and heat. As much as you loved spending time with Jason, you were finding it increasingly difficult to see him during the day.

The question about what you two were still hung in the air -your first attempt at asking him out on a date seemingly forgotten in Jason’s mind- but you didn’t want to ruin whatever it was that the two of you had.

Jason took pity on you, realizing that humans differed from him in their ability to thermoregulate.

“Would you want to go to my cove?” He suggested as you fanned yourself with your wide-brimmed hat, pausing to wipe the sweat off your brow.

“Ah, finally taking me back to your place, huh stud? Took ya long enough.”

Your flirtations seemed to go over his head as Jason told you that it wasn’t far from here, about a 20 minute walk away.

“I might not look like it but I’m actually a great swimmer.”

Even with Jason helping you, there was a high probability of you drowning because of the bigger waves and stronger currents. It wasn’t something that Jason was willingly to risk.

“It’s fine, we can walk.”

As Jason glided beside you, you still couldn’t help but be in awe of the siren. You could already imagine the headlines if Vicki Vale caught sight of them. ‘Gotham’s first and very own cryptid,’ the headline would read. ‘Has Cthulu chosen Gotham City as its preferred vacation spot?’

The cove was closer than you thought, making you wonder why you never moved beyond the tide pools. You didn’t have much reason to, you supposed. The entrance was small and you watched as Jason went in first, his limbs adjusting in size to accommodate himself. It seemed like a short swim.

He paused a few feet into its mouth before turning back to you, still knee-deep in the water. He swam back towards you before guiding your arms to wrap themselves around his shoulders.

“It’s safer this way,” he justified. “The depth drops in weird places.”

You didn’t mind. It was better for you anyway because you could keep your phone dry in your hands and carry your flip flops as well.

Jason thought it was a good excuse to have you touch him.

Soon the water reached a level where you could comfortably float.

This ended too soon, you both thought.

---

As you waded towards the beach, Jason thought that you looked like a jellyfish with the way your dress floated around you. You looked graceful as you moved, tips of your fingers dragging across the water and splashing it around for your amusement.

You reminded him of a time when Alfred and him would take a break from his studies to lay on the seagrass and watch the jellyfish and seahorses float past. It was the first time he felt like he was back home.

But the illusion was broken as he reminded himself that he wasn’t home. He was somewhere more wonderful as he watched you walk onto land, your dress wet and translucent, clinging to your body. Jason wondered if he really did die in that explosion.

As you wrung out the excess water from your dress, the material clung to your skin and rose. Jason was able to get a more revealing look at your body and saw that you weren’t wearing any panties, finally giving him a glimpse of what was between human legs.

He could have turned into sea foam then, grateful that the water here was dark.

You sat on the edge of the beach where sand met sea, patting the spot beside you. The waves crashed and reached your ankles so that he wouldn’t be completely deprived of water, making it an ideal position for him.

Jason sat with a splat of limbs everywhere, mindful to keep that special leg away from you in the event that you grabbed it by accident again. He realized just how huge he looked compared to you and embarrassed, he splayed himself out across the beach, trying to make himself smaller. He knew he wouldn’t have had this problem if he still had his tail.

“Are you posing?”

Jason must have subconsciously gone into a sunbathing position, the classic pose that humans loved to depict sirens in.

You giggled. “No, no. Stay like that. You look cute, like you’re a model or something.”

“Oh yeah?” Jason said, humoring you and trying to laugh off his humiliation. “What should I be modeling?”

You thought for a moment before giving him a naughty smile. “I don’t know, sex on the beach?”

Before Jason could ask you what that was, you leaned over and kissed him.

It wasn’t like he hasn’t kissed before -he has- but it was the fact that it was you that had him surprised, so surprised that it was easy for you to slip your tongue in his mouth and taste him.

You took a wide stance as you straddled him, grinding your hips in his lap as you kissed. Jason wrapped his arms around you to bring you down to the sand with him, only pausing for a breath before his lips were on yours again.

This was better than any kind of fantasy he could think of as he flipped you onto your back, making sure that his hands squeezed your ass before he let go.

He could feel his cock pulse and ache as he felt your silky legs run themselves across his own, getting tangled in them. Your dress was more of a bother than a tease, preventing him from being able to touch all of you. One tentacle slipped off your dress while the other unhooked your bra, tossing it somewhere where the tide wouldn’t get it.

With your body exposed, his tentacles seemed to have a mind of their own, already placing scattered kisses across your body. You giggled into his mouth at the sensation. It felt like you were being tickled all over and you couldn’t help but squirm from their touch.

“Bad girl,” Jason chastised. “Can’t you see that I’m trying to make you feel good?”

“If you’re not going to be good and stay in place, I’ll just have to pin you down.”

A tentacle wrapped itself around each leg, spreading them open. You struggled against the restraints, shy about Jason being able to look at you so closely. One more held your wrists above your head in case you tried to push them away.

Jason leaned down to look at your wet sex closely. It was dripping with a wetness that was thicker than water, making it glisten. A cute little bud laid on top of your hole. Another tentacle prodded between your folds curiously before deciding that it liked how nice and wet you felt, sliding in a few inches at a time.

You let out a squeak as you felt it move in and out, the sensation strange and tantalizing. Jason observed your expression and the sounds you made when he touched you, noticing that you tended to make a high-pitched keen whenever he expanded the tentacle to be thicker or when he went in deeper.

As entertaining as it was, Jason wanted to do more than just hear you, he wanted to taste you as well. You responded well to the tentacle’s suction on that little fleshly pearl, so he wondered what you would do if his mouth was on it instead.

With his mouth hovering over your clit, he gave it a sharp lick before licking a stripe down and up, swirling around that bud once more.

You let out a cry. “More. It feels so good when you play with my pussy like that.”

Jason complied, alternating between drawing circles with the tip of tongue and licking fat stripes with the flat of it. He drew two fingers up to that wet little hole of yours, his tentacle still in it too, plunging in at a pace to match his mouth. It felt incredibly lewd to have your hole stuffed this way.

Jason said your name in a low, almost raspy voice, his voice seductive. “You like that, don’t you? Don’t be shy, pretty girl. We’re all alone here. You can be as loud as you want.”

You gave him a distracted ‘uh-huh,’ making him look up at you questioningly. It seemed that his cock somehow found its way near your mouth. It was more engorged now, the arrowed tip fat and swollen, edges puffy and rounded. It looked somewhat similar to a human cock, just longer, thicker and shinier. It even had a slit on the end and you wondered if Jason would be able to cum like a human too.

As if reading your mind or possessing a will of its own, Jason’s cock slipped itself into your mouth. You felt a stretch in your jaw as you tried to accommodate its girth, only able to comfortably take the head but that was more than enough for Jason.

He groaned into your cunt as he felt your tongue lick across the slit, doing your best to suck while doing it. He glanced up to see drool dribble down your chin, mouth keeping his cock warm instead of sucking.

Adequately wet, his cock slid out of your mouth and Jason knew that it was time. He hovered over you again, letting your tired legs rest against his shoulders.

“I know that you were a little too busy to talk, but I better hear you now that your mouth is free.”

You nodded your head, already panting heavily as you felt Jason stretch your pussy with his cock, the tentacle moving achingly slow past your lips. He sighed as he reached a comfortable spot, giving your body time to get used to him. He could already feel your legs shaking.

“So big,” you whined, thinking that if you moved your hips a little and rocked them, it would make his cock fit more comfortably inside of you.

“It’s so big you say,” Jason mocked, “yet that cute little pussy of yours seems to be taking my cock real nice.”

He let the tentacle that pinned your arms go slack. Your arms immediately drew him towards you, pressing his body close to yours.

He moved his cock inside of you, starting off slow then building up friction.

“Tell me how badly you want me to touch you, how badly you need this cock to cum.”

“So bad,” you whimpered, letting out a sensitive gasp you felt his tentacles grope your tits, suckers on your nipples.

“I don’t think I can cum without you, Jay.”

Your confession alone was enough to drive Jason wild, making him thrust in a little too hard and too fast, an apologetic ‘sorry’ as he kissed your lips.

Jason was practically singing as he fucked you, though this was a different sort of song from his usual ones. You felt the needy hum of his moans and ragged breaths against his chest, the crash of waves serving as distant background music.

He felt your walls squeeze around him, your eyes shut tight and mouth agape, letting out broken whimpers as you came. He could feel your legs spasm around his neck, twitching as he continued on his movements, a bored tentacle moving down to give your clit attention.

He didn’t have time to compare how it felt to have you cum on him versus how you looked, his orgasm closely following yours.

Gently pushing himself off of you, Jason couldn’t help but watch his cum ooze out of you and drip down your legs, a swell of pride in his chest as he realized just how much he unloaded.

After he finished gazing at his work, he settled beside you, looking at your sleeping form, unsure of what to do while you slept. You shivered from the mix of ocean and breeze and Jason knew what to do as he scooped you up to settle against his chest. You could talk about what exactly you two were later. He wasn’t trying to cuddle, if anything he was just keeping a fragile human like you warm.

---

“I don’t get why you want to live in this dump,” Jason said four months later, still at the edges of the shore as he assessed your new home.

Luckily for you, the old Kane Chemicals site was dirt cheap, so even with your modest savings, you could afford to pay for it in cash. The city practically shoved the key in your hands, perhaps eager to finally make a buck off of that rotting building by the sea.

“It’s not that bad,” you told him. “Surprisingly it’s on the electrical grid and all it really needs is a deep clean. And I own it too, so maybe I won’t be hit hard with taxes next year. It’s also a major upgrade from my shitty little apartment in Little Italy.”

The upsides of your new house seemed to go over Jason’s head.

“Just think of me as the girl next door.”

Another blank look from Jason who didn’t understand the trope.

You gave him a sly look before speaking. “Maybe you can’t see me as your friendly neighbor after everything we’ve been through?”

The blush on his face told you everything.

“Of course I can. You better keep the noise down to the minimum or else I’ll call the cops on you.”

“With what cell phone?” You teased.

Speaking in a more serious tone, you looked Jason in the eyes. “I always told you that my heart was with the sea but I lied. It’s with you, Jason. I really care about you, ya know?”

He laughed, pulling you close. “I love you too,” he said before grinning widely. “Now tell me what you like the most about me. My charming personality, my good looks, my fat cock or all three?”

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Jason Todd’s Masterlist

#jason todd smut #jason todd x reader #tw monsterfucking #rest writes #tw tentatodd

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