Work Text:
Sunday was told his death would be soft and warm.
He expected his brain to fade to black and his eyes to open to a blinding light as he lay on some soft, pillowy cloud where his God, Ena, would welcome him with open arms.
Nothing of the sort happened.
He gasped as his lungs filled with air and his body seized on a rocky, wet surface.
Death — or whatever this was — was not comfortable.
“You’re alive,” he heard a voice say next to him.
Instead of opening his eyes to Ena, he was met with an unfamiliar creature at his side. Its fangs and claws were sharp. A metallic smell hung throughout the air.
Was this Heaven or Hell? Sunday didn’t know.
What he did know was that he had never seen a human (monster?) like the one next to him. He couldn’t even run if he wanted to, but…did he want to?
Perhaps it was the creature’s eyes that practically illuminated the cave they found themselves in or the black and green scales that lined its legs up to his torso where it met skin covered in scars. Maybe it was his beautiful blonde locks falling in front of his face, or the way his voice rang in his ears. There was something about the creature that made him want to stay.
The creature scared him, yes.
But he was still alive, wasn’t he?
And he saved him, didn’t he?
Sunday couldn’t speak. He just watched as the creature moved from Sunday’s side and slinked down into the water.
He wondered if his people were okay. He wondered if Ena could still hear him. And he prayed to THEM as he slipped back into unconsciousness.
The sacrifice of one provides a blessing for many.
He remembers now.
Yes, that’s what Sunday was told as he was thrown into the sea, waves crashing over him with hunger as the water swallowed him whole.
So when Sunday keeps waking up with air in his lungs instead of salt water, he can’t help but wonder: were his people okay? Could Ena still hear him? Why did they do this to him? Why would they do this to anybody?
His lungs burned. It felt like his heart was going to burst from his chest.
And then suddenly, someone was at his side.
“What’s your name?” the creature says above him, his voice soft like velvet. His blonde hair drips with water.
Sunday blinks twice, looking at his savior above him and rubbing his eyes. The scales covering the creature’s legs glisten; the green ones pop against the black as they line his body like some sort of constellation. The scales don’t cover his whole body, but they’re not just on his legs. Sunday spots them on his forearms, down his webbed hands, and along the sides of his neck.
He can barely say anything before he coughs, salt still stuck in his lungs. “Sunday,” he finally manages to get out.
“Sunday,” the creature repeats with a smug look on his face. “Drink this.”
Sunday shakily sits up and grabs a plastic water bottle from the creature in front of him. A fire is lit beside him, keeping him warm. The water soothes his throat as he tries to find relief from the gritty salt on his vocal cords. “Do you have a name?”
The blonde smiles. “You can call me Aventurine.”
There are two types of monsters in this world, Aventurine realizes.
There are monsters like himself, who have the self-awareness to know their blood-hungry cruelty; and then there are monsters like humans, who disguise themselves as saints, killing their kind over and over again to circumvent accountability for their actions or inactions.
Perhaps Aventurine has known this all along. But after seeing this wretched, silver-haired man thrown from his nest and into the hungry sea, he’s reminded of just how cruel humans can be.
He pities him, truly.
So much so, that he couldn’t even find the will to sink his teeth into his neck and feed on his flesh when he found his body sinking deeper and deeper toward the bottom of the ocean.
And now, here the man is. Sunday: a human, a beautiful human that should be his five-star meal, sleeping soundly in his cave.
It would be easy for him to devour him right now. He has been in and out of sleep for the past three days, and Aventurine has watched him the whole time from the ledge of his grotto, only leaving once to grab some sort of food and drink he knew the man would eat.
He just couldn’t look away. The way his hair fell across his eyes, how wings protruded from his head and the feathers rested on his face. It was… captivating.
As Aventurine stares at the man, he sees a small twitch of his body. Sunday’s wings flutter twice and his golden eyes slowly open.
“Finally!” Aventurine sings. His voice echoes through the cave. “You’re awake again.”
Aventurine lifts himself out of the grotto. His skin and scales drip with water, leaving puddles in his wake as he grabs a plastic water bottle and can of soup from the corner before walking over to the man.
“Here, I found more stuff for you.”
They sit in silence as Sunday eats the soup and warms himself by the fire. Aventurine can hear the blood rushing through Sunday’s veins, the way his heart pumps with life. He notices the way his wings flutter after a particularly big bite of food.
He can’t take his eyes off of the man.
He watches, and watches, and watches.
Aventurine didn’t plan on keeping Sunday around for this long.
It had been weeks since he rescued him from the depths, and they’d started to coexist together. They asked each other about their lives — Sunday as a human, and Aventurine as a siren.
Aventurine learned that Sunday was a sacrifice to their god Ena, which is why he was thrown into the sea, and Sunday learned that Aventurine is a siren that eats humans.
Sunday heard about sirens in passed-down folktales and remembers being told to stay away from the water at night when he was younger. But he never could have fathomed they were actually real.
He was safe, right?
Even though Aventurine feeds on humans, he still saved him, right?
“Why did you save me?” Sunday asks as they sit by the fire one night. A cold humidity hangs through the air.
“I don’t think you want the answer to that,” Aventurine responds. He busies his hands with a wooden trinket that he found at the bottom of the ocean floor one day.
“It’s fine,” Sunday says. “Just tell me.”
“Well,” Aventurine looks up into Sunday’s eyes. “When I feed, I like to see my victims writhe beneath me. Can’t do that when you’re already on the verge of death.”
“...Then why haven’t you killed me yet?”
A pause.
“…Is it so bad that maybe I just want to look at you for a bit longer?”
Aventurine’s violet and blue eyes burn into Sunday’s golden irises. An invisible force feels like it’s pulling Sunday closer to the siren, his eyes darting between his eyes and his mouth. Aventurine himself almost starts drooling at the proximity with Sunday, the sweet smell of his blood and skin radiating off of him.
Aventurine stands up. “I’ll be back,” he says, and jumps into the water.
A few hours later, Aventurine comes back with books, puzzles, and food to keep Sunday busy for the rest of the week.
He dries off his body before he plops down next to Sunday who’s still sitting fire and hands him his haul for the week.
“Where do you get this stuff?”
“Ehh,” Aventurine starts. “Passing sailors, people on the beach. Whatever’s around, really.”
“Are you hurting them?”
“Does it matter?”
Sunday sighs, dropping a book enclosed in a plastic bag in his lap. “Of course it matters, Aventurine. I don’t want people to get hurt for my sake.”
“Don’t you remember why you’re even here, Sunday?”
“It was necessary for their survival, they—”
“They drowned you.”
“Yes, but—“
“They tried to kill you, Su—”
“Well, aren’t you going to do the same?!” Sunday raises his voice.
Silence hangs in the air.
It’s true, that Aventurine planned to devour Sunday after he’d regained consciousness. He’s dreamed of his tender flesh, how sweet his blood would taste. But it’s been weeks now, and Sunday is still here, and every time he leaves on a hunt he promises himself he’ll kill the man when he returns. But he never does. He can’t.
Aventurine tilts his head towards Sunday. They lock eyes.
With a quiet voice, he asks, “Do you want me to?”
“Want you to what?”
“Kill you.”
Sunday furrows his brows and looks at Aventurine to his right. His gaze falls to his lap. “I…I don’t know.”
Sunday can’t lie to himself. Ever since they talked about Aventurine’s eating habits, he always wondered…
What would it be like to be one of Aventurine’s victims? To be slotted in between the cold ground and the flesh-eating monster, everything out of his control as Aventurine would bite down on his neck and feed on his skin and bones? He had studied his lips and fangs before when Aventurine wasn’t looking. Would they feel as soft and sharp as they looked?
Aventurine’s voice snaps him back to reality. “Would you be happy if I did?”
“I don’t know.” And Sunday really doesn’t.
He never used to fear death. Sunday always knew that eventually, his people would sacrifice him, and so he had weeks, months, years to prepare for his inevitable fate. But, now that he’s been given a second chance — from a man-eating monster no less — he can’t help but question if he should’ve wanted to live.
“You know,” The blonde asks, inching closer and closer to him. “I always wonder why your heart beats faster every time I get close to you.”
Sunday shakes his head. “It is because you’re a monster,” he replies.
“Hmm. And that excites you, doesn’t it? It makes you feel alive?”
A blush creeps up Sunday’s cheeks, his wings fluttering to cover them.
“Don’t cover your face, angel,” Aventurine moves his hands to Sunday’s face, grabbing one of his wings. He massages it between his fingers, earning a soft trill from the human. “I know you think I’m a ruthless, man-eating monster…but have I told you how much I love seeing humans show that they’re truly alive?”
Sunday’s heart pounds out of his chest as Aventurine moves to the crook of his neck, his lips and teeth grazing over Sunday’s skin.
“To see them exude fear, pain, excitement, pleasure…I love all of it.”
Aventurine swings his legs over Sunday’s lap, the scales tickling Sunday’s bare skin. The two of them fall back onto the floor, the blankets and cushions Aventurine brought for Sunday softening the rocky surface of the cave.
Aventurine breathes in Sunday’s neck and rocks his hips forward, feeling Sunday’s groin hardening and growing at a surprisingly fast rate.
“You smell so sweet, Sunday,” Aventurine whispers in his ear, eliciting goosebumps on Sunday’s skin. He bites his neck, but not enough to draw blood. “You tempt me every single day.”
Sunday whines, feeling his desire growing deeper in his gut, his cock growing harder in his shorts as Aventurine rocks against him. “Just…just take me, then.”
“Is that what you want?”
“Yes,” Sunday whispers. “Please, Aventurine.”
“Okay.”
Heat rushes through his body as he feels Aventurine’s fingers playing with his wings, his tongue on his neck, his hips against his own. Aventurine chases Sunday’s lips, sealing the two of them with a kiss as he finally gets a taste of the silver-haired man before him.
Aventurine’s tongue swipes against his lips, and Sunday eagerly opens his mouth, their tongues slotting against each other.
The man underneath him must look beautiful like this, Aventurine thinks.
And he does; Aventurine continues licking into Sunday’s mouth, sucking on his tongue as he opens his glowing violet eyes to get a glimpse of the angel under him. A blush spreads across his cheeks, his brows knit each time he bucks his hips up to chase more friction against his crotch. He looks divine.
Eventually, Aventurine closes his eyes again and Sunday moves his hands to the blonde’s locks. He needs more, the heat pooling in his stomach as he grinds his hips up and— oh.
Something is growing against him.
Sunday looks down to where their hips meet. A small slit right between Aventurine’s legs starts to open, his black and green iridescent scales parting with a thick length coming out of it.
Sunday didn’t think too much about siren biology and assumed their sex would work this way. It was…much thicker and longer than Sunday’s; the end tapered off a bit but hooked up. The whole length drips with what Sunday could only decipher to be a natural lube.
Aventurine moans against Sunday’s chest as it unsheaths from him, growing bigger and heavier on Sunday’s stomach.
The scales on Aventurine’s fingers graze Sunday’s legs as he pulls Sunday’s shorts and underwear off, and Sunday sighs as his cock is finally free, already dripping with precum.
Sunday’s breath hitches as Aventurine grabs both of their lengths and rubs them together, pumping them up and down, spreading the siren lube onto Sunday’s cock.
“A— Ah—“ Sunday whines.
Aventurine grabs Sunday’s face with his free hand. “Look at me.”
It baffles Aventurine, how his desire for Sunday grew from the hunger in his gut to the ache in his groin. He wants to devour Sunday, eat him whole from top to bottom until there’s nothing but bones on the floor and satisfaction in his stomach.
As if Sunday can see it in his eyes, he says, “You do want to kill me.”
“I do.”
“But you won’t.”
“I won’t.”
Because where would that leave Aventurine?
…He’d never feel this way again if Sunday was gone.
So, If he can’t eat him, he has to consume Sunday in another way.
Aventurine places his lips back on Sunday. He removes his own cock from his hand, but keeps moving over Sunday’s length.
A sigh escapes Sunday’s mouth as Aventurine trails down his chest, planting kisses on his sternum and moving to suck on one nipple, then the other. He teasingly nips at his nipple with his teeth before licking lower and lower until he reaches his pink, glistening tip.
Humans have pretty cocks, Aventurine thinks. Sunday does, at least.
Sunday fists the blanket under him as Aventurine licks a line up his shaft, his thighs bending and squeezing Aventurine’s body between his legs. The blonde’s breath is hot as he continues to lavishly work his tongue up his base, until he finally settles on the tip and dips his tongue onto his slit.
It tasted salty. It tasted delicious. Aventurine wanted more.
He rounds his mouth around his head and covers the tip completely with his lips.
“Aventurine—“ Sunday squirms under him.
The siren looks up and sees the feather-headed man’s face flushed red, eyes shut tight. Sweat dripped down his brow, threatening to fall on his silver hair splayed out beneath him.
Aventurine removes his mouth from the man with a pop. “You’re pretty like this, Sunday.”
That prompts Sunday to open his eyes and look down at the creature working on his dick. Aventurine sits in between his thighs with a smug smile, head tilted to the right with his erection basically laying on the left side of his face as he slowly works his hand up and down his length.
Sunday is thankful for the chill air in the cave. He’d probably have passed out by now if it wasn’t there to calm him down.
After Aventurine knows Sunday took a mental picture, he maintains eye contact as he wraps his lips around his tip once more, tongue swirling in slow circles as he sucks the angel’s precum into his mouth.
Sunday tilts his head back, unable to find the energy to hold himself up as pleasure courses through his body. His eyes roll to the back of his head as he feels a tightening in his groin, begging and aching to snap.
“I’m close,” Sunday pants.
Aventurine watches Sunday’s chest rise and fall quicker and quicker as his tongue swirls faster and faster. He moves his hand and starts to jack him off alongside his tongue’s assault, earning moans that bounce throughout the cave.
With one final swipe of his tongue, Sunday bursts into Aventurine’s mouth, groaning the siren’s name as he shoots cum into his mouth and down his throat.
Aventurine swallows. He’s satiated. He could survive on Sunday’s seed for days, he thinks.
But, Aventurine still wants to see the life in Sunday’s eyes. Wants to see him writhe under his touch.
Aventurine sits up, grabs his cock, and lines it up with Sunday’s entrance. Sunday shivers as the tip presses against him, the natural liquid from Aventurine’s length cold, yet relaxing on his entrance.
“Shouldn’t we pr—”
Sunday can’t complete his sentence. His back arches off the floor as the curved head of Aventurine's cock breaches him and slowly pushes inside of him. He’s thick; Aventurine lets out a moan as Sunday’s walls squeeze around him. The two of them groan as Aventurine slowly moves his hips forward, the natural lube leaking inside of him with every inch Aventurine pushes in deeper. The liquid seemingly relaxes Sunday’s muscles; even with no prep, Sunday barely feels any pain, and Aventurine pushes deeper and deeper into him with ease.
“Haaah—” Aventurine moans as he bottoms out inside of Sunday, feeling the man’s walls occasionally flutter around him. “No need for that.”
He looks down at where they’re connected. Sunday squeezes around him, his dick still weeping from his release earlier.
“Please, Aventurine,” Sunday whines. He moves his hips, trying to fuck himself on Aventurine.
He doesn’t know how long he’ll last. How long either of them will last.
Aventurine grabs under Sunday’s knees, lifts them to his shoulders, and attempts to move, slowly sliding his cock out of Sunday. Sunday gasps as he feels bumps on Aventurine’s cock drag out of him, heightening his pleasure as he feels them along his walls and on his entrance. The bumps must be a siren thing.
Finally, just the tip remains; without warning, he pushes his hips forward, bottoming out again as he feels Sunday’s walls suck him in. Sunday moves his arm to cover his face feeling the heat wrack his body. Aventurine slides out again, but this time slams back in as he starts a steady pace fucking into Sunday’s hole.
The human below him is ethereal.
The way his silver brows furrow as he pushes deeper inside.
The way he sings, the sound of his pleasure like music to Aventurine’s ears.
The way his feathers move to cover the blush on his face, and the way his dick twitches against his stomach as Aventurine touches his wings, moving them so he can see his human’s angelic face.
The slapping of their skin and slick fills the room, mixing with their moans and cries of pleasure.
It’s all too much for Sunday. Aventurine leans down and cozies his nose against his neck. Sunday whines at the stimulation from Aventurine’s stomach on the backside of his dick.
He was getting so much, and yet he wanted more. He needed more.
And then he feels a sharp pinch, and liquid trickling down his back.
Aventurine really did it.
Aventurine fucks into him as his fangs sink into the flesh of Sunday’s neck as he bites down and groans at the sweet, metallic flavor. It takes everything in him to remove his teeth and close his mouth, planting kisses on the bite marks, bloodying his lips. He laps at the blood with his tongue, licking from Sunday’s shoulder all the way up to his ear.
It’s dizzying, Sunday thinks. And not just from his lack of iron. It hurts, but it feels good, like something inside of Sunday has been released and he can finally breathe again. He doesn’t know what to make of it, and yet his body feels electrified with even more pleasure.
“You know, you taste sweeter than you smell,” Aventurine purrs into Sunday’s ear.
Sunday doesn’t know if he can take anymore, and yet it seems like the taste of him lights a fire inside Aventurine.
The siren pushes Sunday's legs back to his chest, practically folding him in half. The tip of Aventurine’s dick pushes even further inside of the man, and it hits an angle that has Sunday’s stomach drop.
Sunday whimpers as he wraps his arms around Aventurine pulling him close, feeling the head of his dick rub against that needy spot inside of him, the butterflies in his stomach fluttering and Aventurine fucks in and out, again and again. Aventurine makes his way back to Sunday’s neck, his teeth hovering over his skin.
Sunday cranes his neck for him as if his body is begging him to take another bite.
“So needy,” Aventurine smiles against his pulse. “You really want more?”
“Y-yes,” Sunday moans.
“What do you want?” Aventurine asks as he continues fucking into Sunday.
“Bite me,” Sunday begs. Tears start falling from his eyes. “Please.”
Aventurine smiles and dives his teeth back into Sunday’s skin. Sunday whines as Aventurine drinks from him again. His flesh is tender, and somehow his blood even sweeter than the first time. Aventurine chalks it up to the chemicals coming from his arousal mixing with Sunday’s.
Aventurine keeps up his pace as he reaches down between their torsos to grab Sunday’s cock, still sensitive from his climax earlier. Sunday’s brows knit together as Aventurine’s hand touches him, the scales on his hand sending electrifying sensations up Sunday’s body.
Aventurine pounds into Sunday faster, his walls squeezing and sucking him in, as he laps at the blood at Sunday’s neck. His hand pumps Sunday’s cock just once, then twice, until Sunday arches his back beneath him.
“Ah–! Aventurine, please–” Sunday stutters. “I’m gonna–”
“You can do it, angel.” Aventurine whispers against his neck.
Sunday whines into Aventurine’s ear.
With a hot lick of his neck and a final pump between his legs, Sunday’s core explodes, and he shoots spurts of hot, white cum across both his and Aventurine’s chest.
Sunday trills as the siren continues pounding into his body, his hole thrumming and pulsing around Aventurine as he chases his own release.
“Cum inside,” Sunday moans. His eyes are glazed over from pleasure as he takes and takes and takes. “Please.”
“You want me to fill you up?” Aventurine smirks, his eyes dark and devious as his hands move to clutch Sunday’s head. “You want me to breed you?”
Sunday nods, eyes brimming with tears as he’s unable to get any words out.
The blonde feels his core tighten as he brings his lips to Sunday’s. The man moans against his lips as Aventurine bites down and breaks skin; the taste of his blood is all that he needs to bring him over the edge as he stutters inside and pushes deep, feeling thick white strings of seed release into the man beneath him.
Aventurine collapses on top of him, burying his head into the crook of his neck, breathing in his scent. He glances down towards Sunday’s neck; he still bleeds, but that’s okay. A healing incantation should do the trick once he’s sleeping.
He rolls off of the human and onto his back, craning his head to the right to look at the man next to him. His eyes were shut. He looks…peaceful.
“What is it?” Sunday opens his eyes and turns to look at Aventurine. The glow of the fire illuminates the siren from behind, his blonde hair glowing and creating an almost halo-like ring around his head.
“Nothing,” Aventurine shakes his head. “Can’t I look at you for just a bit longer?”