Mutual Fascination
I do have in mind a part two for this if enough ppl like it. Enjoy for now~
Naga AU! Highly inspired by the world building of the bakudeku fic in the eye of the storm it stopped updating back in 2019 tho:((((
(Warnings: Naga au, monsters, imprisonment, non con touching)
(Naga AU! Izuku Midoriya, Bakugou Katsuki, Shouto Todoroki, Eijirou Kirishima x human!reader, poly)
Four weeks ago, if someone had told you nagas existed, you would have laughed.
But now, four weeks later, still a castaway, still seeing remnants of the boat you were once on floating in the sea, you don’t have the luxury to laugh, not anymore.
You still don’t remember what it was. The boat looked fine during the storm, but there was a crack, a blast.
Next thing you know, you were waking up ashore, with someone inhuman hovering over you.
Izuku. The first naga you met on the island, staring down at you as though you were something to be admired. You remembered screaming, scuttling away, startling him because of your quickness. He couldn’t speak your tongue that well-none of them could. His mouth wasn’t human enough, his vocal cords were strained, tempted to hiss. He was coherent enough for you to learn that he wasn’t the only one on the island.
Shouto was Izuku’s mate. At least, you think they were mates. Izuku was more lenient on him than the others, softer. The naga was bigger than the green serpentine, a longer tail, just slightly smaller than a minivan. He was quieter, didn’t bother trying to speak human, no matter how many times you coaxed him to. He spoke in clicks and hisses, turning to Izuku when you didn’t understand. He was more aloof, but sometimes you’d wake up to him and Izuku curled up around you, lavishing in your natural body head.
Eijirou was boisterous, friendly. You liked him a lot. He was the second smallest, barely longer than Izuku. You like his coloring the most. A bright red, easy to spot. He was a bit too curious for your liking, constantly hovering, constantly touching. His greatest fascination was in your legs, moving them, watching them bend. Sometimes he goes too far up for your comfort as you have to snap your legs back. His apologetic look makes you forgive him instantly.
The leader of them all was Katsuki. His scales were a fiery orange, it matched his personality. They all listened to him, even Shouto, when he hissed and spat in mostly anger. You think he didn’t like you at first, with all the scowling, but now it’s more like he doesn’t like it when you don’t exist around him. He isn't as touchy as Eijirou, but he lacks personal space like the others. He’s rougher, too. Constantly wrapping a clawed hand on your arm, dragging you wherever he pleased.
You’re surprised it’s Izuku who challenges him the most, mostly about you. They squabble and bicker constantly, hissing in a tongue you don’t understand. Shouto mainly watches in amusement, Eijirou often looks worried when they start fighting with you near the vicinity. Then, one of the males will drag the other deeper into the island. They come back hours later with cuts and bruises around their body, both equally huffy. You don’t think there’s ever a clear victor.
But they loved eachother. You could tell in the secret smiles Katsuki gives solely to Izuku when he thinks no one is watching. Shouto and Eijirou sunbathing together on a warm rock, hands shyly touching. The concern Shouto gives to Katsuki every time the naga comes back from a hunt, covered in bruises and scars. Eijirou half-listened to Izuku’s hisses, languidly cuddling beside him. You wonder if you were the only outsider in the world who knew of their love. You are the only one they’ve ever given an insight to.
But that’s all you were, an outsider, and soon enough, you’d have to return to your own world.
Today’s the same, as it always was. It’s Eijirou who’s curled up to you, this time, snoring softly in his coils. His claws lie just beside you, close to touching. Even in his sleep, he’s careful, quick to treat you gently, carefully.
But gentle doesn’t mean he isn’t practically sprawled on top of you, practically shielding you from whatever intruder that could come. You don’t know why he still does it, nothing could ever come into this cave they call home. Why would anything? Four territorial nagas is scarier than anything.
You think they consider you harmless, at least for now. Why else would they be so giving to you, always making sure you’re the first to eat, careful of their claws, their tails. Your best theory was that they saw you as a lesser being, something that needed to be cared for. Maybe they think you’re a runt of their kind? A glorified pet? You’re just grateful they haven’t considered you as food, yet.
You wiggle a bit, Eijirou doesn’t budge, still deep into his slumber. You think for the first few days you tried to reclaim your dignity, refusing to curl up with them when the sun dipped into the water. You were still wary of them, worried they might gnaw on you in your sleep. You decided to huddle in a place far from the cave, under the night sky.
Somehow, you always woke up in one of their arms. So now, you just stop bothering.
You look around. There’s no one else to help you. Izuku, Katsuki, and Shouto must’ve woken up early. You don’t know what they do, maybe hunting, but you can’t be sure. As of right now, you don’t care, not when Eijirou is practically making you sink into stone.
“Wake up,” You whisper insistently into Eijirou’s inhuman ear, “Eijirou wake up!”
You pat his cheeks repeatedly, that seems to be the trick, because he’s hissing, cracking a slitted eye in mild annoyance before realizing it’s you.
“Oh,” He hums, sleepily, “Hello.”
“Hi,” You say back, “Could you get off me, please?”
Eijirou’s frowning, but in the end, he relents, hoisting himself up, away from you. You stretch as well, folding your knees. Eijirou watches in interest.
“Where are the others?” You ask him.
Eijirou looks around, finally seeming to realize you’re the only one there.
“Gone,” He finally says, “Water.”
You hum, transfixed on him. The sudden attention seems to fluster him. He shuffles his tail a bit.
“I didn’t know you guys could go into water.”
“Me no could long time,” Eijirou struggles with his words, and you feel bad that they have to strain their vocal cords to talk to you, “Izuku no could long time. Katsuki yes. Shouto yes.”
You hum. Izuku and Eijirou must be close to land snakes then, while Katsuki and Shouto were more affiliated with water. It made sense. Both of them were longer, slender, loosely resembling eels, while Izuku and Eijirou were stockier, sturdy. You wish you could ask if that meant they both had gills, but you don’t think Eijirou would be able to answer.
Instead, you sit up, turning to walk outside of the cave. Eijirou follows, like an overgrown puppy.
The sun is already high in the sky, when you exit the cavern. If you listened closely, you could probably hear the ocean crashing into the rocks.
“What are you planning on doing?” You ask the naga.
He points at you, “Watch.”
Right, he needs to keep an eye on you, at least until the others get back. Him waking up later than the others was a silent sign that he had to hold back for babysitting duty. You give him an apologetic smile, before trekking off into the far side of the camp.
It used to be an abandoned clearing. Something natural, but ever since you arrived, that’s slowly been changing. A campfire site was added. Grass and other soft material was gathered when it was discovered you had a hard time sleeping on a cold stone floor. Another list of things they did that they really didn’t have to do.
You wished you could do something for them. Hopefully getting out of their hair faster would be a gift in itself.
It wasn’t a boat. Too shabby, clearly made by the inexperienced. You really had Katsuki to thank for the material, ripping apart trees with his powerful claws. He’d preened when you’d complimented him, thanking him.
You spent more than a week on it, using pliable bark to hold it together. A raft, your mind finally supplied. It was a raft, with a thin sail attached. You had no idea how you were even going to control it, but it was better than staying here.
Four weeks. You’d spent almost a month hoping for rescue. Maybe you’d have better luck out in the ocean, than here on an uncharted island.
Eijirou gives an excited click, hovering over the contraption. He points at it with a claw, looking at you with wonder. You realize you haven’t been babysat by him in a while. You were usually with Izuku, sometimes Shouto. This was his first time seeing it.
“Raft,” You supply.
“Raft,” He repeats, fascinated, “Why?”
You pause, trying to explain it in the simplest of words.
“I can’t swim well in ocean-water,” You correct yourself, “This will help.”
Eijirou nods, eager. Excited.
“Swim? Swim?” He asks, “Swim Katsuki? Shouto?”
“I won’t be swimming with them, no.” You gently say, “This will just help me leave the island. Maybe find a rescue boat.”
Eijirou couldn’t understand you that well. He didn’t learn as quickly as Katsuki, or Izuku, but you admired his determination to try to learn, to try to understand you. It’s why when you speak to him, you tend to be a little less guarded. You gave a lot more information, stuff you never mentioned to Izuku and Katsuki or Shouto, left yourself a little open.
Truthfully, you underestimated him a bit.
You don’t get a response, instead you feel a sudden weight on your body, pushing to the ground, on your back. Your stare at Eijirou, his eyes are panicked. Wide.
Scared.
“Leave?” He trills, “Leave? Leave? Why?”
He’s gentle, he’s always gentle. But not when he’s desperate. Today, his claws sink into your skin because he doesn’t care. He doesn’t care enough, not right now.
You shudder out a breath.
“Eijirou,” You weakly say, “You’re hurting me.”
He shakes his head.
“Leave? Stay!” He pleads, just as pathetically.
You hate how you feel relief when you hear the foliage shift, because you don’t want to be afraid of Eijirou, you really don’t, but you look up anyway, watching as the three naga still when they see the scene before them.
Shouto is the first to move, clicking at Eijirou angrily. He’s close to putting a hand on his mate, shoving him off the poor defenseless human, when Eijirou is clicking back.
Shouto stills. Your heart sinks.
Izuku moves frantically, slithering to your body. His eyes slip from you to the raft he helped you build. You can tell that it’s slowly starting to click in his mind. His hair’s wet, droplets falling down his face, but you know his eyelashes aren’t wet from the dive in the ocean.
“Leave?” Izuku is saying, “Why? You stay? Here good. Ocean bad.”
You’re shaking your head. Eijirou’s grip loosens, he pulls away in silence. You prop yourself up, keeping your gaze on the first naga you’d ever met.
“Izuku,” When you usually say his name, he preens in adoration. Today, he winces, “I can’t stay here. I have to go back to my own kind. To other humans.”
Neither of you are prepared for the loud crack. You flinch, turning towards Katsuki. His fist is shaking, injured, bruised.
And your little raft, something that could’ve barely withstood a small rainstorm, is splintered to pieces.
“You can’t leave,” He’s hissing, “Stay. On Island.”
No one’s holding you, dragging your frail body down to earth, but you suddenly feel heavy. You look in horror at the thing that was once your way of escape. Your last hope.
“Why?” You ask, but it’s too quiet, but you want to be angry and upset, “Why did-did you…”
Cold hands slip into yours. Izuku is staring at you, tilting his head in understanding, but he doesn’t understand. He can’t.
“Stay here,” His voice is soft but you know it’s not a suggestion, “With us.”
“I can’t,” You feel like you’re repeating yourself, “I need to get home. I have to get home.”
“This home,” Izuku says, “Your home.”
You feel sick. You want to throw up because this feels so wrong. Too wrong.
Your hands fall away from him. Izuku lets it, lets you crawl back, away from them all. Because he knows.
He knows you can’t go anywhere.
You’re shaking your head, “No no you can’t. You can’t just keep me here. Why? Why?”
“You are ours, you can’t go.” Katsuki’s voice cuts in, Izuku glowers at him with a soft hiss, probably telling him to be gentle with you, like he always does, but no amount of padding stops you from reeling at his next words.
“Mates can’t go.”
You’re stammering, maybe laughing.
“I’m-I’m not your mate,” You spit the word out like it’s poison, “Humans…it doesn’t work like that. Not with my kind. You-you can’t want me. Keep me.”
Eijirou hovers next to Izuku, looking at you, “Yes,” He says softly, “Want. You.”
“Chose you,” Izuku’s finishing for him, “For us.”
You’re crying now, something hot and festering building up in your chest. They couldn’t. God they wouldn’t, right? Suddenly the constant touching, cooing, the coddling they do for you. It all clicks. And it all becomes too much.
“Please,” You’re replying, weak, “I can’t live the rest of my life here, until I die.”
“Yes,” Someone’s saying. You don’t recognize the voice.
Shouto gives you a wide grin, filled with sharp teeth. For the first time, he speaks.
You’re too filled with dread to acknowledge it.
“Stay. Until you die.”
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