Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/13639551.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M
  Fandom:
      Teen_Wolf_(TV)
  Relationship:
      Derek_Hale/Stiles_Stilinski
  Character:
      Derek_Hale, Stiles_Stilinski, Everyone_else_is_mentioned, Scott_McCall_
      (Teen_Wolf), Lydia_Martin, Sheriff_Stilinski, The_Hales
  Additional Tags:
      Kinktober_2017, Tentacles, Octopus_people, Meroctopus?, i_dont_know, Sex,
      Anal_Sex, Underage_because_Stiles_is_17
  Series:
      Part 12 of Kinktober
  Stats:
      Published: 2018-02-11 Words: 3869
****** Take that Guillermo Del Toro ******
by myboybuildscoffins24
Summary
     Stiles finds something lurking under the dark water of Hale Lake.
Notes
     I was asked to do tentacles/other stuff, but I couldnt fit the other
     stuff in. This was supposed to be all porn, but somehow got feels.
     I'll try to get the other requests in the future fics.
     Look the only thing I know about octopus and such is from like Planet
     Earth of whatever, so please dont get mad at me. This is like a
     wereoctopus so I am making it up as I go.
     As always unbetad.
See the end of the work for more notes
Stiles was an idiot, he knew he shouldn't have come out in the woods alone. The
other lacrosse players had dared him to go to the preserve and steal a chunk of
sign at the end of the pier. The Hale Lake was notorious for the drownings that
had happened there over the years. The most notable was Derek Hale, who had
went missing in the water, never to be found. Stiles had been devastated, since
he had followed Derek around annoying him at any chance. Their families had
been close before Stiles mother died. Once Derek had disappeared, Stiles had
retreated in on himself. Losing Derek and his mother within a few short years
took a toll on him. The Hales had moved after the tragedy, leaving the once
gorgeous late to the elements. 

 There were stories that it was haunted, strange creatures lurked under the
murky waters. Stiles didn't believe any of it, it was more sad than anything.
That didn't stop from making his way to the lake in the dead of night.
Stiles used his phone’s flashlight as a guide as he trudged up the trail
towards the lake, everything was overgrown and seemed creepier than he
remembered. The buildings that had once housed snacks and towels were now
barely holding shape. Windows had been broken, graffiti sprayed over the
decaying buildings. Broken chairs, and boats half rotted littered the lakes
shore.  
The end of the pier had a sign that read Hale Lake, with a small list of rules.
It had been faded without the upkeep. The other players told him to bring it
back, and then he and Scott would be able to go to the party at Lydia’s. He was
never invited to those type of parties so he was hoping he could impress Lydia.

 Stiles saw the pier itself, rickety and old. It had not been maintained for at
least five years. He wondered if it would hold his weight. The first step
creaked lightly, but held his weight. Slowly he made his way towards the end,
each step taking him further from shore. Further from safety. He felt the hair
on the back of his neck stand up, almost as if he was being watched.
At the end of the pier when he saw the water ripple in the pale moonlight. He
swallowed thickly, as the pier itself rocked under his weight. Gripping onto
the edge of the sign, he tugged lightly trying to work it lose. He cursed
himself for not bringing any tools to help him. Tugging again, he ripped half
of it off the pole. Pulling hard, he tried to free the rest. It would not come
loose. “Fuck.” He hissed, planting his feet down. “Shit.”
Stiles pulled, just to have the sign snap in two. He lost his balance, falling
backwards and into the water. The cold water was a shock to his system as he
hit the surface. He struggled to swim his way to the top, but the water was
dark. He couldn't see, he felt himself snagged on something at the bottom of
the lake. He tried to reach down to free himself from whatever he was caught
on. The edge of his jeans did not budge. Suddenly he felt something touch his
leg, as if he was being pulled free. He swam up, gasping for air, choking on
the water. The weight of his soaked clothes made it almost impossible to stay
afloat. He grabbed at the pier, fingers slipping on the wood, as he tried to
pull himself up. That’s when he felt it, something on his leg, wrapping it’s
way around. He shouted out, kicking his legs, trying to get whatever it was
away.
 There was no way he was going to be able to pull himself up, so he swan
quickly, trying to make his way back to shore. Whatever was touching him was
right behind him, he felt it wrap around his waist, pulling him. Shrieking
loudly, he called for help. In the back of his mind, he knew no one would hear
him. No would know he was out here until his car was found parked in the back
of the preserve where hardy anyone ventures. “Help!” He screamed, flailing in
the water.
His feet hit finally hit ground as he neared the shore. He made it closer to
the shore, the water lapping at his waist when he was stopped. He tried to
extract whatever was wrapped around him, hands moving down to tug. It felt
slippery, and wet, he looked, seeing what looked like a thick string of seaweed
wrapped around his torso. Another slid around his left bicep, wrapping around
his arm. A tentacle. Stiles gasped, struggling to free himself, forcing himself
closer to shore. He stumbled, until he was on his hands and knees, water
lapping at his face. That’s when he felt it, a hand on his neck. He screamed
louder, inhaling water. The hand pulled him up and dragged him to the edge of
the shore, as tentacles continued to wrap around him. He was in maybe two feet
of water at this point, as he felt himself being turned over. In the moonlight
he saw it, the shape of a human, eyes glowing blue.
Stiles struggled to break free, but couldn't move. He felt shore against his
back as he was laid out onto the soft sand. “Please.” He begged, eyes wide with
fear. “Please let me go.”
The thing moved closer to him, face coming up to his own. It looked almost
human. Dark hair, long and wet, sticking against its shoulders and torso. It
fell over half its face, covering it like a curtain. That’s when he saw, from
the waist up it was human, but down it looked like a octopus or something of
that nature. Huge tentacles, wrapped themselves around Stiles body, flexing and
moving. The face of the thing looked at him, eyes blue and shining. ‘He’
thought Stiles, thinking from the lack of breasts and the hair on the chest. He
moved forward, until he was face to face with the young man. It brought up a
webbed hand, running a finger across his face, as if tracing. “Sttiii.” It
said, eyes on him. “Stiiiiiss.”
Stiles froze in fear, watching as the octopus man, tracing his finger along his
face and down his neck. That is when it clicked. “Derek?” He gasped.

 It had been years since Derek had disappeared, but it looked exactly like him.
Older and rougher, but still Derek. His sharp nose was the same, the shape
Stiles had traced over and over in his dreams. The eyes faded from blue, as the
thing hissed out. He ran around hand across Stiles chest. “Stiiiiillllssssss.”
He said again.
“Holy shit.” Stiles gasped out. “You are alive?”
 Derek moved back, tentacles loosening and continuing to rove over Stiles body.
The tentacles on his arms loosened enough for him to use them. He reached up
moving the hair from Derek’s face. Derk moved back, letting Stiles go. The man
moved back into the water, disappearing in the depths.
Stiles laid there for a moment before scrambling up. He stood on the edge of
the shore, watching the water ripple, until it went still. After a while he
began to chill, knowing he needed to get home, before the cold set in.
 He looked back once more, before following the trail back to his car.
 
>>>>>
 
It had been a week since the lake, and Stiles had poured over research for
days. Scott asked him what had happened at the lake, he told him that he had
fallen in the water and nothing more. He was distracted, as the days went by.
Maybe he had made the whole thing up, maybe it was a dream. Octopus people
weren't real. Octopeople? Mertopus?
He knew the only way to prove to himself it was real was to go back.
That’s how he found himself at the lake again, this time during the day. It was
still creepy, though not as bad. The water was murky and dark, he shuddered at
the thought of being in it that night. He walked the length of the shore for a
little while, calling for Derek. It wasn't until he started throwing rocks into
the water, a shape appeared. A head rose out of the water, dark hair laying
flat against the crown of his head. “Derek!” Stiles shouted, waving at him to
come closer.
Derek moved, forward until his shoulders came out of the water, but no closer.
He tilted his head to the side, and said something to Stiles he couldn't make
out.
 Stiles moved, realizing Derek wouldn't come to the shore. He walked over to
the pier, going to the midway point, and laid down on his belly. Stretching out
his hands, he beckoned Derek closer. Derek wrapped a tentacle around a pole and
pulled himself up, until he was face to face with Stiles. “Stttiiiii.” He
hissed, running his hand up across Stiles face.
“Yeah.” Stiles said. “It’s me. Man, I didn't know you were alive. You are like
some kinda mermaid thing, I thought I was hallucinating.”
Derek tilted his head, moving his face closer to Stiles and sniffing. “Yeah
sorry, I couldn't shower after practice.” He told Derek, looking and seeing the
gills on the man's neck. “I wanted to get out here as soon as possible.”
Derek seemed listen as he analyzed Stiles face. He sniffed again.
“Maaaaaaeeeee.” Derek rumbled, before licking Stiles cheek.
 Stiles gasped, pulling back. “What the hell?” He gasped, feeling his face heat
up.
The other man slid down into the water, laying on his back. The tentacles came
up, moving quickly and propelling him away from the pier. “Wait!” Stiles said.
“Don't go please!”
It was too late though, Derek disappeared into the murky black water.
 
>>>>>
 
It became somewhat of a routine. Every chance Stiles got he made his way to the
lake, sitting on the pier or the shore. Derek appeared every time, bobbing in
the water. Stiles talked to him, telling him about his day, his dad, Scott, and
anything he could think of. Derek listened, growling and hissing softly. He
seemed to like Stiles company, at least enough not to leave. Stiles figured
that if Derek didn't want him around, he would have made it clear.
He began to tell Derek about his own family, he found Laura on facebook and
read through her profile. Derek disappeared for a few days after that,
seemingly wanting time to himself.
Stiles apologized, saying he wouldn't bring it up again, but Derek shook his
head, and touched him lightly. After that he made sure to tell him bits and
pieces of what he picked up. Cora’s college announcements. Laura getting
married. All of this information seemed to soothe Derek, though causing him to
hide from time to time.
 
>>>>>
 
Stiles went as far as to buy a small boat, rigging up some wheels to pull it to
shore. Derek watched from the water, swimming back and forth as Stiles pushed
out. He paddled over to Derek, who dunked under the water and disappeared.
Stiles huffed, yelling about ungrateful merpeople, when Derek popped up beside
him. He didn't climb into the boat, but simply held the edge. That is how
Stiles ended up sprawled out on the boat, arm over the edge, fingers trailing
the water. The more time they spent together, the more Derek seemed to grow
bold. He wrapped his tentacles around the oars, moving them, seeming to
explore.
 Derek stayed by the boat, listening as Stiles talked to him. He growled and
hummed, half the time. Stiles didn't know what it meant, and he had become
accustomed to Derek’s tentacles. Seeing as he was touched by them almost as
much as he was by Derek’s hands. One would come up, wrapping its way around
Stiles wrist, weaving through Stiles fingers.
Some days Derek would bring Stiles shells, and small fish. Stiles thanked him
every time, trying to put the fish back in the lake without Derek seeing. He
kept the shells though, even buying himself a large jar to put them in.
 
On one particularly warm day, Stiles lounged in the boat, which he filled with
pads so he could comfortably lay down. He was telling Derek about the Marvel
movies, making his way through all of them. He had just explained in great
detail the subtle hints of Valkyrie’s bisexual undertones, when he glanced over
to Derek. He was blinking up at Stiles, looking incredibly relaxed. His hair
was dry, and curling slightly, from being out of the water so long. His beard
looked lush, and full. Stiles fingers flexed, wanting to run his hand through
it.
Stiles turned over, face to face with Derek. The tentacle wrapped around his
arm flexed gently. Another coming up, over the boat, holding it still when
Stiles movement rocked it. They stared at each other for a moment, eyes locked
before Stiles leaned in and kissed Derek gently. Neither moved, as their lips
touched. Derek kissed him back gently, mouth moving slowly. Suddenly Derek
jerked back, tentacle slipping into the water.
 He moved eyes wide before disappearing into the inky water below them.
 
Stiles face heated, and he paddled his way back to shore. He got out and nearly
ran home. He didn't know why he did that, why he had kissed him. Maybe because
Derek was kind, even in his own way. Derek was always gentle with Stiles, even
saving Stiles from once capsizing his boat. Derek dragged him and the boat back
to shore, hissing at Stiles angrily. That was the closest to shore Derek had
come since the first night.
 
>>>>>
 
It took Stiles a full week before he could face Derek again. He waited by the
shore debating whether or not to call for him. The choice was taken away with
Derek appeared in the water close to the pier.

Stiles made his way over, laying down to look at Derek. “I’m sorry.” He
apologized. “I shouldn't have kiss you.”
Derek shook his head, hissing words back at Stiles. His tentacles came up,
touching Stiles softly before coming back down into the water. They stayed like
that for a moment, before Stiles became uncomfortable and filled the silence.
 
>>>>>
 
Even after the kiss they seemed to stay the same, Derek didn't get quite as
close though.
It had been three months of this until Stiles decided to bring his swim trunks.
He got to the shore, tossing a handful of small rocks into the water,
signalling to Derek he was back. Derek appeared a moment later, watching as
Stiles stripped out of his shirt. He kicked off his shoes and began to wade
into the water slowly. Derek moved, watching him. “Come on!” Stiles shouted.
“Don't make me swim alone.”
Stiles moved forward, making it up to his waist, before Derek met him. He
jumped slightly at the feeling of a tentacle wrapping around his leg. “You
really like touching?” He asked more to himself than Derek.
Derek rose up, until they were the same height. Stiles reached out slowly,
letting Derek see his actions. He ran his hand over Derek’s chest. It was hairy
and warm. They could be mistaken for two men standing the water, if it wasn't
for the tentacles he could feel moving around him. He felt one wrap gently
around his waist, pulling him in. “Stiiiii.” Derek hissed. “Maaaaaaeeee.”
Stiles nodded slowly, not exactly sure what the second part meant. Derek said
it a lot though. Derek leaned forward, dragging his nose against Stiles throat.
“Sttiiiii.” He said, before licking the skin of Stiles shoulder.
 The younger man gasped out, hands coming up to hold Derek’s shoulders. He
licked the skin over and over, moving from place to place. Stiles felt Derek’s
tentacles flex and move, wrapping tighter around him. “Fuck.” Stiles hissed,
feeling himself start to get hard, as Derek gripped his waist.
Derek moved back, before kissing him roughly. His tongue moved into Stiles
mouth, and Stiles moaned loudly. His hands began to roam Derek’s torso,
reaching down to grab at Derek’s tentacles, letting his fingers trail down the
one that was wrapped around his waist. Derek growled loudly, pulling back and
panting. “Stiiiii.” He hissed.
Stiles had done enough research to know where to go, he found the smallest
tentacle. Male octopus usually used that one as a sex organ. He ran his fingers
over it, and Derek jerked back, mouth open. It came to wrap around Stiles hand,
as two others moved around slipping up the legs of Stiles trunk.

 Stiles shivered at the feeling, the thick tentacles moving against this flesh.
They pressed forward, one rubbing gently against Stiles hole, as the other
moved under and wrapped itself around Stiles hard dick. “Derek.” He gasped,
rocking slowly.
Suddenly, they were moving, Derek dragging them closer to shore. He moved
Stiles on to his hands and his knees. His head and torso were out of the water,
but his lower half was still under it. Derek moved behind him, and he felt his
shorts being pulled off. They went soaring over his head and onto land. He
spread his legs wide, feeling the tentacles wrapping around his legs and torso.
He felt like he was being surrounded by Derek and he loved it. He felt a
tentacle prod against his hole as Derek used his hands to hold Stiles cheeks
apart. He gasped as something slick and warm touched his hole, even in the
water he could feel the lube like substance. The tip rubbed against him
insistently before pressing in slowly. He gasped out, feeling himself stretch.
It wasn't like he hadn't fucked himself before, but this was different. His
dildo was not like this. Derek slowly pressed him, wrapping himself tighter
around Stiles. Stiles gasped out, as the tentacle began to pull out and push
in. Fuck, he was being fucked by a tentacle. No weird hentai could have
prepared him for this. Derek’s hands roved over Stiles, touching him. Another
tentacle came up, wrapping itself around Stiles cock, stroking him. He felt
surrounded, completed. As if Derek was everything he needed. He felt himself
getting closer to the edge. “Derek, please.” He gasped. “Fuck me harder.”
Derek grunted above him, the tentacle around his torso, slipped up against his
face. The tip touching his chin, he dipped down sucking it into this mouth.
Derek growled, thrusting harder, his body rocking Stiles forward. He leaned
forward, biting Stiles hard on the shoulder. The younger man gasped, coming
hard, and body seizing up in pleasure.
 Derek above him stilled, and he felt himself fill up with warmth.
“Stiiiiillllesss.” He said, coming inside of him.
It was hot, hotter than Derek felt. Derek slowly slid off of him, moving back.
Stiles fell over, crawling up a little further to the shore. He felt the
tentacle slip out of his ass, the cool water taking its place. He rolled over,
looking at Derek who seemed to be shaking. His eyes were blue, and wide. His
mouth opened and closed. The man fell back into the water with a splash. Stiles
yelled, jumping up and moving towards him. He grabbed at Derek, pulling him up
and towards the shore. “Are you okay?” He asked, trying to make sure Derek
wasn't hurt.
That was until he looked down and saw legs. “What the fuck?” He shouted,
clearly seeing human anatomy.
Derek held onto Stiles, trying to stand up. Stiles helped him up, trying to
avoid eye contact with the new dick and balls Derek had. “Stiles.” Derek said
roughly. “I’m human?”
Stiles nodded stupidly as they both stood naked in the water. Derek moved
forward wrapping his arms around Stiles. He pressed his face against the young
man's neck. “I knew you could do it.” He murmured. “Mate.”
Stiles was speechless, holding Derek back. The webbed hands had disappeared,
and even the gills. They stood their holding each other, until Stiles forced
Derek to leave the Lake.
 He ended up helping Derek walk back to the jeep and giving the man a pair of
sweats to wear before driving him to the Sheriffs station to inform his father
that he had found Derek in the woods.
 
>>>>>
 
It took a few months for everything to settle down after that. The Hales flew
back from New York where they now lived. The official story is that Derek had
hit his head and gotten lost. He lived off the land, not being able to find his
way back.
Stiles told his dad he had found him by accident and brought him back to
civilization.
It took some convincing, but Derek refused to leave Beacon Hills with his
family. They ended up buying him a loft. Stiles hung around, a lot. Even though
his father advised against it. Derek went to therapy, to try and make up for
lost time. Seeing as he preferred to growl and hiss, instead of talk at times.
It had taken a year to finally convince people that Derek was adjusted enough
to make his own decisions. He got a job in the library shelving books, and
cleaning. All that time didn't stop Stiles and Derek from seeing each other,
Derek had explained how he pissed off a woman who turned out to be a witch. She
faked the drowning, instead turning Derek into that creature. She laughed,
telling him true love would break it, thinking no one would want him. That was
until Stiles came. Stiles liked to say it was the power of Disney love that had
saved him. Derek was similar to the Derek from before, though more quiet at
times.   
 
>>>>>
 
“I’m back!” Stiles shouted, slamming the loft door behind him.
Derek poked his head out of the office door. He raised an eyebrow at Stiles.
“I’m not deaf.” He said simply, moving his way to the younger man. “Everyone in
a mile radius heard the door slam.”
Stiles skipped over to him, flinging himself against the other man. Stiles
snorted. “Stop being a sourpuss.” He teased, kissing his boyfriend lightly.
“That’s not what you called me this morning.” Derek huffed. “I think ‘sex god’
was the term you used.”
 Stiles laughed, leaning back. “Don’t use my words that I said in the heat of
the moment against me.”
“I’ll use anything I want.” Derek said, teasing.

 He let go of Stiles, moving towards the counter where a box was sitting.
“That’s for you.” He told Stiles, standing next to it.
Stiles moved forward. “Oooh did you get me a present?” He asked, opening it up.
He stilled when he saw what was inside. “Did you?” He asked, reaching down and
pulling out a tentacle dildo. “I can't believe you got this.”
Derek rolled his eyes. “You said you wish we could do it again.”
Stiles grinned, leaping at Derek and kissing him. “We are using this right
now!” He said, grabbing Derek’s hand and dragging him towards the bed.
“Of course.” Derek grinned, following Stiles to the bed. 
 
End Notes
     Hope you enjoyed, I havent written anything like this before. I cant
     say I didnt like it, cuz I did.
     Hit me up on tumblr if you want to talk to me about anything
     @hecklin.
     -D
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