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So this was way out of my normal writing zone but decided to go with it anyway and see how it would turn out. :D It’s definitely pretty bizarre from the types of stories I normally write, but here it is! Enjoy this random smut abomination! XD

(18+ Female Reader x Cthulhu)

Sanitarium Maiden

The waves appeared calm for the moment, as you were being transported to a deserted island way off the coast of the mainland. The waves had been getting increasingly restless the last few weeks and only now seemed to calm down for your voyage.

He knows you're coming.

The island was home to the old, abandoned "Sanitarium", built for The Great Dreamer hundreds of years ago. The main building consisted of a large and lavishing mansion with a matching garden and estate. Underneath the posh and wealthy exterior lay an underground research facility and old ritual grounds. The locals nicknamed the old building the "Sanitarium" since it was once home to many "ill" minded people.

When The Great Dreamer was first discovered by the people of this land thousands of years ago and they believed in the ultimate sacrifices and total devotion to such a powerful entity. Enough so, that an entire cult following was born along with an estate far out on a deserted island, to be closer to him. They all lived and died on the island and believed that their services and sacrifices were the only reason anyone on the mainland (or perhaps the world) was safe. They believed this to be true until one woman among them discovered differently.

The Great Dreamer, or more commonly known as Cthulhu, is a large and powerful being that lives in and controls the ocean. He's a Great Old One and has many abilities and powers that extend far past his confines in the vast sea. Some believe he's a type of God that could once hold the power of the universe in his hand. For now, however, he resides amongst the large body of water, controlling its movements and destruction.

Eleven months out of the year, Cthulhu lies dormant, keeping your particular town safe from harm and devastation. The town rested on the edge of the mainland and relied on the sea for food and protection. Cthulhu provided such needs to the small town, as you were the only ones to truly repay him for his services.

You were approaching the small island with the "Sanitarium" estate. Along with the mansion, a large lighthouse was built on the other end of the island with a loading dock for ships sailing to and from the mainland. The lighthouse was always running even without anyone needing to be on the island.

Your ship came up to the dock as you grabbed your stuff and we're helped off the boat by the crew and dropped off on the dock. The crew was a friendly batch of sailors who all thanked you profusely for your service before telling you that they would return in the morning to pick you up.

You smiled nervously as you waved goodbye to the gentleman aboard as it slowly drifted away. Looking out across the ocean, you could barely make out the shore of the mainland that was now so far away in the distance.

You took a deep breath after watching the ship sail away for a while. Your body began to feel anxious now setting foot on the island and mind racing with the whole event for which you came.

You left the shore and walked down a path past the lighthouse that led to the garden of the mansion. The garden consisted of a large hedge maze with entrances that led to the underground facilities. You pass one of the entrances and peer down the dark corridor leading underground. Your heart sinks and you decide not to explore. You had heard many tales of the horrors that lie beneath the estate and figured it's best to not add any unnecessary anxiety to your mind at this moment.

The path leads out of the maze and down to a large balcony and patio that wrapped around a part of the mansion, overlooking the ocean and with a part even leading almost into the sea. You walked up to the main balcony, admiring the gorgeous, old mansion that has remained in good shape after all these years. The patio occupied many outdoor tables and chairs to hold small groups of people that wanted to overlook the ocean as well.

You walk up to the railing and see the deep, dark blue ocean below. A cool sea breeze washes over you, accompanied by all the smells of the ocean. The breeze makes you shiver slightly with the chilly December temperatures. The sun begins to set below the horizon, only adding to the cold weather.

The water still appeared calm, gentle waves barely kissing the railing on the lower part of the balcony below. You take another deep breath in, soaking up the now calm and peaceful atmosphere. You knew this would only be short-lived for a little while but was nice to enjoy while you could. You then headed inside to begin preparation for your job as a maiden.

***

Cthulhu was treated and handled for years by the cult that resonated on the island. They were rumored to have done unspeakable and horrible things to each other, all in hopes of appeasing The Great Dreamer. Until a young daughter of the man that built the estate, tried a different approach.

She respected and devoted herself to Cthulhu as much as anyone else at the time had, except she was oblivious to the cult her father was a part of underground. She instead loved The Great Dreamer with all her body and soul, and on a night when the waves were raging, she decided to show him her love and devotion. She snuck out to the water's edge on the lower balcony, stripped off her clothes, and proceeded to show her love for him with her own body.

She made love to herself, grabbing his attention enough to reveal himself to her. His tentacles of many sizes decided to help her out and give him mutual pleasure and enjoyment as well. Both shared a special bond and moment that night that then started a tradition from that day forward.

Nothing the cult ever did for him has ever made such a lasting impression as she did. And as word quickly spread amongst her friends and the other women in town, a new kind of ritual was then made that caused no one to be harmed or abused any longer.

"The annual maiden" was the name given to the woman who would please The Great Dreamer each year. Every year, a woman would volunteer for the role and stay the night on the island appeasing Cthulhu. The night picked every year was always December 24th, Christmas Eve. For the women of the town, it quickly became known as a Christmas gift for Cthulhu and only seemed more fitting for such a tradition amongst the townsfolk.

Many of your friends had volunteered in the past to become maidens themselves and always retold the event as "the best Christmas ever". After much encouragement and stories, you finally decided to volunteer yourself.

You were beginning to feel more and more anxious and nervous the later into the night that it got. You could hear a thunderstorm rolling in outside, as the waves began to pick up with it. You knew it was him calling to you.

You donned a satin white dress that was made for each maiden every year for the tradition. The dress was flowy and went down to the floor, and had a corset style torso with puffy long sleeves. The dress was low cut to reveal your cleavage while covering up everything else. Underneath you wore a small pair of white lace panties. They were low cut and hugged your hips just right, leaving a little tease in the back.

Beneath the anxiety that you feel, your body was now growing excited with wearing the proper attire.

You braided your hair and prepared to walk out on the balcony, barefoot. The time was reaching midnight and you knew your moment had arrived.

You walked out on the stone patio balcony and could barely make out the full moon peering through the storm clouds. The moon guides your way down the path that leads up to the ocean. The stones were wet from rain and waves rolling past the railing. The water and the air were cold, with chilling raindrops kissing your exposed skin.

You look out into the now wild and untamed ocean, waves crashing into the shores of the island. Dark storm clouds swirl overhead with large drops of rain making ripples in the ocean and bouncing off the stones under your feet. All you could hear was the rain splashing into the water and echoes if thunder rolling in the clouds. The edges of your dress are being soaked by the raising ocean as it gets carried with every push and pull. The scenario appeared a lot scarier than you imagined.

You couldn't help but take a step back as large tentacles emerge from the sea and begin flaying in the air just offshore. About half a dozen tentacles dance along the edges of the balconies and part of the island. The tentacles are massive and make your eyes widen after realizing that they're easily twice the size that you are.

You almost feel afraid when you feel the ground shake and rumble as Cthulhu himself emerges from the vast sea. Jaw drops as an enormous dark green entity stands tall above the water, easily overlooking the entirety of the island. He appeared to have the body of a human with big wings like a bat and an octopus-like head. Webbed hands, glowing yellow eyes, and more large tentacles sprout from his back.

You easily capture his gaze in your white dress in contrast to the otherwise dark backdrop. You continue to back away slowly seeing his massive figure for the first time even with him being far off in the distance. His wings stretch out and flap once or twice before relaxing as he takes a few steps closer.

In the pale moonlight and the spotlight from the lighthouse, you can see his body is very muscular and toned with defined abs and pecs. Looking further south you also see his large, flaccid cock catch your eye. Your face flushes red, remembering what you're here for.

He was so much bigger than you imagined, gawking up at him almost in horror. You’re perhaps the size of his eyeball and could easily layout in one of his hands with room to spare. He approached just a few miles outside of the cove of the island and stood still while silently watching you. His tentacles on his face were all moving individually as his big, glowing yellow eyes seemed to be calming you as you no longer felt afraid or nervous. Like he was telling you that he would not harm you. You felt almost relaxed compared to the increasing anxiety that you had felt prior.

He continued to look down and watch you, making you realize that perhaps you should make the first move in this arrangement. You started to feel a bit nervous again, not knowing where to start. You look down at your dress to perhaps remove it and see that it had become heavy and soaked with the rain. It was now see-through and hugged every curve and feature on your body. Your face turns bright red, seeing your exposed nipples and breasts through the now sheer fabric. Along with the lace outline and texture on your panties underneath. The dress that was supposed to cover a majority of your body but was now revealing everything you had to offer.

You lightly picked up on the edges of the dress and tried to pull it up and off but to no avail. The dress is so wet and heavy and refuses to let go of your skin, instead, you let go and it makes a splash at your feet when it hits the water. You could hardly move through the raising water and with a heavy dress holding you down. You look up at Cthulhu, unsure of what you should do now.

Cthulhu continues to watch you patiently but notices your predicament. He manifests dozens of smaller tentacles right out in front of you in the water, each squirming and wiggling on their own. You feel your body get excited again, knowing this must be what he uses for the women who visit him. The tentacles are drastically smaller than their larger counterparts that were still flaying further away. These were still very long but seemed like you could easily wrap your hand around one.

Many of the tentacles appeared normal, like those from a squid or an octopus that tapered at the end and were covered with tiny suction cups on one side. Others appeared smooth on both sides and instead had a bulbous tip. All of them are a matching dark green color and move fluidly and independently towards you.

You feel yourself grow increasingly wetter between your legs and any anxiety you had previously felt was now washed away by Cthulhu’s calming presence.

Two of the normal tentacles slither through the water and wrap themselves around your ankles that were completely submerged in the now shin-deep water. The tentacles feel cold but yet warmer than the cold water that your feet had almost become numb to at this point. Another pair of tentacles find and grab your wrists, before gently lifting you off the ground and into the air. He lifts you a few feet off the ground and you feel the weight of your dress favor with gravity, only to accentuate and expose the front of your body even more. Your nipples were hard from the cold and you could now plainly see the white lace panties underneath that were also becoming sheerer.

Another normal tentacle finds its way up your dress, to gently slither up between your legs and breasts. You feel that it's cold and almost slimy as it glides easily against your wet skin. It feels like a giant tongue snaking up your torso and poking out at the top of the dress. You can easily see the defined shape and detail of the tentacle through the sheer dress as it lays between your breasts and against your body. With one swift movement and force, the tentacle lifts quickly, splitting the dress in two.

You gasp in reaction and feel a new rush of cold air and rain grace your now exposed body and skin. The tentacles holding your wrists adjust to let the wet dress slip off your arms and land in the water below with a large splash. Your pussy begins to throb, realizing how close you are to being completely naked and exposed in front of The Great Dreamer. Your lacey white panties were indeed pretty sheer, if not from the rain but perhaps from your own excitement as well.

Cthulhu held you up horizontally facing him, as to see your body in its entirety. The dress-splitting tentacle returns to caress your breast and wiggle its suction cups across your nipple, making light popping noises as it moved. You let out a small moan to the sensation, feeling almost like someone was sucking on it. Your nipple became more aroused with your body, becoming sensitive to his touch. A matching tentacle joined in around and across your other breast, causing the same sensation to both nipples. You moan, feeling your hips subconsciously rock with their movements. He holds your wrists above your head to only perk your breasts out even further for their touch.

The tentacles around your ankles slowly and gently spread your legs wider, revealing your wet pussy through the sheer fabric of the panties. You feel another tentacle slither in through one of the leg holes in the panties and press its suction cups against your lips and clit. You let out a louder moan to the unexpected feeling, and let your hips rock into the tentacle now wiggling in your panties.

Cthulhu was already making you feel more phenomenal than you had ever imagined, and he knew it. You had nearly forgotten his presence until you looked out at him, to see he was slowly starting to enjoy himself as well. His large cock was now firmly erect from watching and playing with you. Even though this was only the beginning of your bond.

The tentacle laying across your lips, slowly dipped inside your pussy, letting just the tip wiggle in and out. The tentacle was cold in contrast to your warm inner walls, causing you to sharply inhale at the welcoming experience. The large muscle pulls in and out of you, making soft squishing noises and pops as it moves. Your panties had slid down a bit from the activity, revealing more of your ass to the cool breeze behind you.

The tentacle then pulls out completely and hooks itself on the waistband of the underwear before pulling them down completely. Your panties fall down the tentacles holding your ankles and lay amongst the cluster of limbs in the water.

Your body was now fully exposed to The Great Dreamer, and couldn’t help but feel your pussy get wetter and more aroused, having your legs spread and be on full display for him.

The tentacles holding you up then flip you over in the air, to where you’re now looking down at the water-covered balcony below you. Your head is pointed down just a bit to leave your ass and pussy exposed up in the air. You can no longer see what’s happening and somehow this adds to the excitement as the tentacles on your breasts remind you of their presence by continuing to move around and suck on your sensitive nipples.

Your legs are still spread, feeling the new sensation of raindrops hitting your ass and running down your wet lips, and dripping off your clit. Even this felt like a purposeful tease and only made your body crave more. You could sense that Cthulhu was ready to grant your request as two more tentacles coiled around each thigh, holding them spread. The tips of the tentacles glide up to your pussy and using their suction cups, gently spread your lips apart holding you open to feel the cool breeze enter you. You moan, feeling your excitement drip out of your now exposed opening, making your hips gently rock.

Another tentacle wraps around your waist and tummy and glides down the front to curl it’s tip over your clit’s hood to suck on the exposed clit underneath. The tentacle holds your hips in place as it slowly starts to suck and fondle your clit, holding you up to give The Great Dreamer the perfect view. Your body could hardly handle any more hesitation. It longed to have him inside you, and he knew it too.

Without any further delay, one of the bulbous tipped tentacles begins to hotdog your spread lips. Gliding between them exchanging excitement with each other as it makes long, slow strokes up and down your lips and opening. You continue to moan to the unique experience before sharply inhaling to the feeling of him pushing his way inside of you. The tip felt larger than the average human male, but nothing you couldn't handle. You feel it venture as deep as it will comfortably go before pulling back out, it was unlike anything you have ever felt before.

Cthulhu continued to thrust the tentacle in and out of you, slowly picking up the pace. Each time it would leave your body and re-enter, you could feel the temperature change with the cold rain and air that found it before it would glide itself back in. Your mind felt like it was going blank from all the stimulation your body was receiving. Your clit continued to swell with arousal as the tentacle still slowly sucked and stroked it.

After a bit more tentacle fucking at a nice quick pace, it quickly pulls out completely feeling your arousal drip off your clit with its exit. The two tentacles are still sucking on your lips to keep them parted, feeling that cool breeze enter you once again. You let out a groan to the empty feeling, as another pair of tentacles coil around your thighs as well and rest their tips on your ass cheeks. The suction cups grip your ass as they slowly spread your cheeks apart to reveal your tight asshole. You let out a surprised moan and squirm in their grip as you feel the bulbous tip slowly stroke up and down against your hole. Rubbing your lube around and over it. You squirm but Cthulhu knows that you don’t hate it and can feel him slowly pushing the tip inside. You moan feeling your ass slowly being filled, it almost makes you want to cum instantly, but the tentacle over your clit has come to an almost complete stop as the bulbous tip fucks your ass at a gentle pace.

“Ooooh!” you moan out feeling your ass being pumped, slowly increasing it’s speed. Another bulbous tentacle comes up and rests right in front of your face. You can see a light glisten of pre-cum resting at the tip. The tentacle looked just like a human penis but without the testicles. You slowly open your mouth and stick your tongue out, to give Cthulhu the confirmation to go inside. The dick slowly inches closer until the tip is resting on your tongue. You taste the sweet but salty pre-cum as you slowly begin to suck on the tip. The tentacle dick slowly begins to go in and out of your mouth as you suck and tighten your lips around it. In the meantime, your ass has continued to be pumped at a quicker speed.

You feel yourself getting close, but the tentacle over your clit has now curled away completely, leaving it to throb in the open air. Your body desires more and is feeling restless from the lack of attention your pussy was receiving. The tentacles still holding you spread, continue to tease that more was to yet come. You feel another bulbous tip start to rub circles around and over your clit, rubbing it’s pre-cum over the sensitive nub. The sensation almost makes you jump but allows your arousal to build once more. You feel your excitement run out and down your lips and meet with the cock that’s rubbing your clit. You moan around the dick in your mouth, feeling the cock behind slowly run up your lips before dipping inside. Once again, it’s cold and thick, your inner walls tighten around it instantly as it wastes no time picking up the pace.

The two cocks behind you take turns going in and out at rhythmic intervals into your ass and pussy. You feel your orgasm building slowly as you continue to suck on the dick in front of you. Suddenly, the cock in your pussy pulls out almost completely as you feel another tip rub against your clit. You squirm, knowing what’s coming next. And before the cock in your pussy could slide all the way out, another cold cock pushes it’s way inside alongside it. You let out a loud moan, feeling your inner walls stretching in a pleasurable sensation, being filled by two tentacle cocks in your tight pussy.

They wiggle and squirm inside you before now matching the rhythm from before with the one in your ass. Besides the tips, the tentacles themselves were not as girthy as you were used to and seemed to easily squeeze into any space they wanted. Your pussy felt filled but in a comfortable and pleasurable way. Making you almost desire more. The tentacle returned to your clit and began to quickly suck and stroke it. It caused you to moan loudly, feeling your orgasm building very quickly once more. Your clit and cunt were so swollen from the attention, that you could feel your release drawing near.

Before that, however, Cthulhu wanted your desires to be met in full. All of the cocks stopped thrusting as the one from your mouth was removed. You let out a groan feeling your edging arousal fade. The dick from your mouth was well coated with your saliva as it squeezed alongside the cock in your ass. You inhale sharply, feeling the first cock slide out part way so the new one could slip in. The one's in your pussy were still fucking you at a slow, teasing pace as the tentacle over your clit began to speed up again as well. The tentacles over your breasts squirmed and coiled to fully grip both boobs with the suction cups wrapped around and over each hardened and sensitive nipple.

The second cock slipped easily into your ass as they both started pumping once more with the ones in your cunt. The sensation of being filled makes you cum instantly. You moan loudly as your inner walls grip and convulse around the cocks inside you. Cthulhu follows you shortly behind as your orgasm is enough to push him over the edge as well. You hear him let out a loud screech and feel his warm cum coat your inner walls and squirt inside your ass. The sensation extends your orgasm to its limits making your body and limbs go limp with ecstasy. You feel his excess semen run down your swollen lips and drip off your sensitive clit.

Cthulhu holds you there for a moment longer, before gently removing the tentacles in and around your ass. His semen being pushed out alongside them. The tentacles coiled around your thighs and tummy release next, closing your lips around the cocks still resting in you, before he slowly slips those out as well. You watch as semen drips out and into the water below as he gently carries you over to the higher balcony before setting you down on the cold, damp stones.

His tentacles release your arms and legs before slipping back into the sea. The storm has passed to reveal a clear and starry night, the revealed moonlight bathing your glowing naked body. You sit up on the patio and watch as all of the tentacles, large and small, slip back beneath the surface.

Cthulhu gives you a parting and thankful emotion as he too turns and emerges back into the sea.

Your body still felt like it was riding on the ecstasy from the experience and incredible orgasm. Easily the best one you’ve ever had. You caught yourself still panting as your body was still trying to wind down. You now understood why your friends raved about it so much and why it made for such a memorable experience. The Great Dreamer wasn’t scary like you had originally feared, but instead seemed gentle and loving. You would happily return another year just to see him again.

You glanced down at the calm waves, seeing a newly added layer of seafoam on the shore’s edge. You look out in the direction that Cthulhu emerged from with a fond smile and whisper, “Merry Christmas.”

Notes:

So, ...that happened...

So this story was inspired by the Sanitarium map from Killing Floor 2. I had heard of another Cthulhu-related smut story in the past and my brain basically ran from there. This is definitely not the type of smut or fic I would see myself writing very often, but was kinda fun with the randomness and life of it’s own that it practically took on. And now this map will never sit the same way again! Thanks brain... xD

#cthuhlu #fanfic #smut #female reader #reader insert #tentacles #killing floor 2 #sanitarium #yuletide horror