Take Me Under – Siren!Todoroki x Human!Fem!Reader

Quietly you slipped out of the cabin door and made your way to the bow of the boat, the night’s soft breeze forcing you to take a calming breath in as the chatting and laughter from your father and his crew-mates dulled behind you. 

“I just want to go home,” you thought sadly as you climbed out onto the narrow bow and lay down on it on your stomach, tenderly dipping your fingers into the ice cool waters of the Pacific Ocean.

As the daughter of a pirate most of your time was spent at sea. You did have a land home- as you called it, but your father and you only docked there twice a year. You liked being on land, it was tangible, you knew there wasn’t anything lurking beneath. 

The only thing that drew you to the water was him. You had seen him a few times but only glimpses, and although your father believed in merpeople he would joke and say you had been smoking the crews weed… you knew you hadn’t been dreaming or high, you knew he was real.

“I wonder if he’s around tonight?” you thought as you swished your hand around in the water and looked out over the glass calm ocean.

As you lay there you felt a vibration tickle your water coated fingers and immediately retracted them in surprise.

“What was that?!”

You placed your hands on the bow and pushed up a little to look out over the water as a flash of red- just under the surface of the water, caught your eye. Your heart started to race as you sat all the way up and pulled your knees up under you, craning your head high and blinking a few times to make sure you were indeed awake and not dreaming.

Movement caught your eye again and your focus darted to it.

This time it was a flash of white.

“It’s him!” you screamed internally.

With a trembling hand you pushed your fingers into the water and wiggled them, hoping to get his attention. 

“Please come back, please come back,” you begged to yourself.

More movement caught your eye just below the bow and as you stared into the watery abyss two mismatched eyes became visible and you gasped audibly and pulled your hand back out of the water. 

“Come up, c-come up here,” you called into the water, “show yourself.”

The eyes slowly came closer to the surface of the water and you instinctively moved back with fear as the merman’s head rose from the water.

“D-Do you speak?” you asked softly with fear, mesmerized by the iridescent blue eye and mottled grey eyes of the creature before you. 

“Yes,” the merman replied in a deep voice, his red and white hair parted neatly down the middle and hanging wet in his eyes.

You nearly hyperventilated.

“Oh my god, y-you talk,” you gasped in a breathless voice.

“Of course,” he replied with monotone confusion, tilting his head to the side with no expression. 

“I didn’t know you spoke? I’ve seen you a few times from far away this is the first time you’ve been up close,” you said, hypnotized by his eyes.

“I’ve watched you,” he admitted bluntly, “most humans are not known for their beauty but you are an exception.” 

“I—, is that supposed to be a compliment?” you deadpanned, “well, thank you? I think you’re really beautiful.”

Human. What is your name?” the merman asked, swimming closer 

“Y/N,” you replied softly.

“I am Shouto,” the merman replied, reaching his hands up to the bow and pulling his face up to yours a little, holding it just inches from yours, “I believe the term in your human language is ‘kiss’ so would I be able to indulge in a ‘kiss’ with you?” 

“You’re very blunt, but I like that,” you replied leaning your face down to his and pressing your lips to his.

Surprisingly his lips were warm and you relaxed against them then pulled back.

“I am not sure how to say this,” Shouto then said as he swished his beautiful blue, red and white tail in the water, “but there is another ‘kiss’ where both parties engage the tongue as well. What is that called?”

“Tongue kissing,” you replied with a blush, “did you want to try it?”

“If I may?” he replied, looking at your lips.

“Ok,” you whispered, leaning your head back to his and parting your lips as he parted his.

His tongue touched yours and slid against it, the sensation in your mouth making your pussy ache while you made out on the bow of the boat. 

“Is this ‘tongue kissing’ supposed to cause a sensation in one’s copulating organ?” Shouto asked as he pulled back from the kiss.

“Copulating organ?” you asked, confused.

Shouto pulled back from the bow and rolled onto his back in the water to show you his cock, which had now extended through a slit just below where his human torso met the merman tail. 

“Oh my god!” You gasped, covering your eyes with embarrassment.

“Why are you reacting like that?” he asked as he sank back down in the water, getting the feeling he had done something wrong.

“I—, uh, y-you just showed me your…” you gestured wildly between your legs.

“Am I not supposed to? When the copulating organ is erect it is a sign that I am enjoying what I am doing.” Shouto stated.

“You’re so blunt!” you hissed, “is this normal?”

“I believe so?” he replied. “I have a question. As with mermaids do you also possess the female organ for copulation?”

“A vagina?” you deadpanned, “yes, but sometimes we call it pussy because it sounds better.”

“Do you also have another word for a merman’s copulating organ?” Shouto asked curiously.

“Yes. Cock, or dick.” you replied, getting more and more blunt to match him.

“May I see your pussy?” be asked casually.

“Oh my god! Shouto! You don’t just ask humans if you can see it?!”

“And why not?” 

“Well?! It’s just? It’s not something you do?! Why do you want to see it?” you asked with a blush.

“I wish to explore you.” he stated calmly.

You pushed your hand between your thighs and squeeze them together, the aching there ramping up a bit.

“Well, because it’s you, sure.” you replied, looking around before kneeling up and sliding your pants and panties down then sitting down on the side of the bow and taking them off completely before putting your legs in the water.

Shouto swam in between your legs and placed his hands on your thighs then pushed your legs apart so he could get to your shaved pussy better.

“May I taste it with my tongue?” he asked as he looked up at you with those captivating eyes.

You nodded with a blush and watched as he tenderly poked his tongue out and tasted your pussy, licking gently over your folds.

You gasped a little and placed your hand on his head, stroking his white and red hair. 

“Is this feeling good?” he asked.

You nodded, “yeah, keep doing it.”

“As you wish,” he said, “this is making my cock pulsate.” 

“Oh my god,” you squealed, “how can you say that so casually?!”

Shouto ignored you and pushed his tongue a little deeper into you while you moved forward to allow him better access.

“This is why I believe human females to be superior because you can split the legs to access the pussy better,” Shouto said.

“I’m not even fazed by your comments anymore,” you moaned, enjoying the feeling of his tongue swiping over your clit.

“I know my next question is going to be quite forward—.”

“Are you saying that your other questions haven’t been?!” 

“But, I would be most honoured if my cock could service your pussy. I believe it would be pleasurable for both of us.” He said as he pulled back from licking you.

“Eh?!” you gasped, “w-w-what?! You just asked if we could have sex, I—.”

“Is it called ‘sex’ in your language?” Shouto asked. “Then yes, let’s have sex.”

“B-But, will I have merchildren if you cum in me?!” you asked, mortified.

“You will not bear my children, we are different species.” he stated calmly.

“Well how would we, you know, do it??” you whispered.

“Come into the water,” he replied, “I can gift you the ability to breathe underwater for 40 minutes.”

“You can do that?” you asked with surprise.

“Yes.” He nodded.

“How?” 

“We need to ‘kiss’ and while kissing you need to inhale my breath,” he stated.

“Ok?” you replied dubiously, slipping your shirt up over your head then sliding into the water, his hands immediately caressing your naked sides as his cock pressed against your thigh. 

“I will take you to my room, my abode is directly under where you are anchored.” 

You nodded and his lips connected with yours, your lips parting as a deeper kiss ensued. While you kissed you inhaled his exhaled breath and continued to kiss, breathing deeply as he sank, with you, under the water.

Deeper you both descended, making your way to the bottom of the ocean while making out. 

Surprisingly, you could breath and you broke from the kiss and looked down as a faint glow on the bottom of the ocean drew closer.

“Your place?” you whispered to him, your voice ringing clear under the water unlike how it usually was if you tried to talk under water. 

Shouto nodded, taking your hand and diving down while pulling you with him.

Swiftly he entered through a coral window, into a room that had a giant clam as a bed and brushed his fingers across some glowing sea ferns to make them dim their lights. 

“My place is away from the others.” he said as he floated back and lay on his clam bed, pulling your body up over his, “we will not be disturbed here.”

His hand slid down your back to your ass and squeezed firmly while he pushed up into you, his cock rubbing against your clit and pussy as you spread your legs and gently placed them either side of his tail.

Engaging you in another tongue kiss he placed his other hand on your ass and with both hands dragged your body up his then arched his tail so that his cock lined up with your pussy and entered you in one swift movement as he pushed you back down.

“Mmmm~,” you moaned into his mouth, gripping your fingers into his neck as he used his hands on your ass to pull and push your body up and down his to allow his cock to slide in and out of your pussy. 

“Human pussy does feel quite tight and thus, exceptionally good on one’s cock,” he said, gripping onto you a little harder as he continued to drag you up and down his dick. 

“S-Shouto, your cock feels amazing inside me,” you moaned, letting him fuck you how he wanted to. 

“I am glad,” he said as he rolled over you and sandwiched you to his bed, using his hands to pin your wrists to the bed so he could arch and thrust vigorously.

“Yes~,” you cried with pleasure, “yes, just like that, I like it when you fuck me.”

“What is that word? Fuck?” 

“It means to be doing what you’re doing,” you panted, “just keep pushing your cock in and out of my pussy, firmly, I like it firm.”

“Oh?” he asked with a smirk, “you are what we would call a fyre-maiden, you like to be owned with rough copulation.” 

“Yes please, do just that to me,” you gasped, arching against him and wrapping your legs around his tail. 

“Very well, I did copulate with a fyre-maiden a number of moons ago but her pussy didn’t feel as good as yours,” he replied, pulling out of you and rolling you over in the water so that he could push you down onto his bed and take you from behind.

You didn’t need to do anything as he pushed your face down into his bed and raised your hips with his other hand, his cock finding your pussy again as he slammed it into you and thrust in and out of you firmly, grunting as he railed you.

“Wahhhh~,” you cried loudly in ecstasy, body shaking as Shouto’s cock bought you closer to orgasm. “I’m close, I’m close, keep going, just like that!” You cried.

“Prepare for me to release my spores,” Shouto rasped, “I will claim you with them.”

Just then you both came, crying out together as his cock throbbed into your contracting pussy. 

“S-Shouto, that was amazing,” you panted, “I don’t ever want a human again, I only want your cock.”

“I have strong feelings that mirror what you just said,” he stated, “let us part for now, but know that I will be watching from the waters and will be longing for the next time we can have sex- as you say.”

“Wait, how much longer do I have to get back to the surface?” you asked quickly as you rolled over and sat up.

“You have just enough breath to ascend from 

now,” he said regretfully, “remember to go slowly otherwise you can develop bubbles in your blood- as you possess human blood and not a mermaid’s.”

“Yeah, I know what the ‘bends’ are,” you said, “goodbye Shouto, thank you so much for coming to me.”

“It was my pleasure, Y/N, go now. I will see you again.”

You nodded and kissed him passionately one last time before swimming out of his window and ascending slowly, letting a few bubbles out of your mouth to make sure you weren’t ascending faster than they were. 

Everything went dark as Shouto’s light below got dimmer and dimmer and soon you couldn’t see anything at all- panic setting in as you floated slowly to the surface.

“What if I get attacked by a shark?!” you petrified brain screamed at you, “or the Kraken, or giant whale?!” 

Fear striking you to the core you started breathing faster, freaking out in the middle of the black ocean.

As you hyperventilated you found yourself short of breath and started to suffocate on the air that was rapidly leaving your system.

You quickly took a breath in and then held it, looking up to see if you could see any moonlight above.

“I’m not gonna make it, I’m gonna die here in the ocean, this is it,” you cried, running out of air before you had reached the surface.

Unable to hold your breath any longer you coughed and inhaled, water rushing into your lungs, choking you instantly. 

In a panic you threw your arms out and started clawing for the surface.

“Please, please, it can’t end like this!”

Suddenly a flash of white and red blurred your vision and you were pulled to the surface, gasping and spluttering as you grabbed for the bow of your boat. 

“Shouto,” you gasped, choking and spluttering as you clung to the wooden outcrop, “thank you.” 

Just then there was noise on the boat and your dad appeared with a lantern, making you shrink into the water and cover your naked self.

“Dad?!” 

“Y/N, what the devil are you doing naked in the middle of the ocean?!” Your dad asked, half mad, half confused.

“I wanted to go for a swim?” you offered sheepishly.

“It’s bloody, 2am?!” 

“Does swimming have a curfew?” 

“Have you been smoking the crews weed again?” he tisked, “next you’ll tell me that you swam to the bottom of the ocean and had sex with a merman,” he cackled loudly. 

“Ahaha,” you laughed nervously, “no? As if that would ever happen.”

Your dad turned and grabbed a towel off the rail, “here, he offered, holding it out like a screen so he couldn’t see you, “climb back up before the Kraken gets you.”

Sheepishly you got up out of the water and took the towel, wrapping it around you. 

Your dad took a piece of seaweed from your hair and inspected it.

“What were you doing on the bottom of the ocean?” he asked, “this seaweed is only found on the bottom.”

“I-I wasn’t down at the bottom, I just wanted to swim on the surface.” you lied.

“Beware Y/N, I heard the cry of a fyre-maiden just before, I know I joke about them but mer-people are real and you mustn’t be careless lest they carry you away and make you theirs.” he warned.

You looked back at the ocean longingly.

“Yeah…” you whispered under your breath, “I wouldn’t mind being his…”

~ END ~

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