Thread by @GettFisted

░M░O░N░S░T░E░R░

🖤Taekook • Explicit
⚠️Sibling Incest • Tentacles

Jungkook hates himself for two reasons:
1. He's a monster.
2. He harbors lust for the one person he shouldn't.

•No replies, pretty please!
•Quote only
•I'd love you forever if you'd toss this a retweet.
•I'll be updating this in sections!

The accident is innocent enough. Jungkook is nine years old when he's playing a simple game of hide n' seek with Taehyung. He giggles as his brother counts, scampers around the abandoned construction site as they always do.

The wood creaks under Jungkook's weight as it always does, the scaffolding around him sways lightly as it always does. He hears Taehyung in the far distance yell, "Ten!", and as he does, Jungkook's small frame breaks through a sheet of particle board and he tumbles hard.

He crashes to the ground, hitting metal poles and broken plastic on his way down. When he hits the ground and dust clouds around him, everything goes dark.

He comes in and out of consciousness, each time more frightening than the last. He sees flashes of trees, the sun barely poking through, the dark shadow of someone nearby. He feels fire shoot up his arm and collect in his back, right between his shoulderblades.

He hears someone screaming, so loud and so terrified. As he ages, he'll realize it was himself. And inbetween it all, he sees nothing but an empty black where his consciousness should be.

When he finally comes to with a clear head, the sun is gone and he lays alone in the dirt and weeds in the middle of a small thicket. He recognizes it, it's not too far from the construction site he remembers being at last.

Jungkook blinks his tired eyes and shifts to push himself off the ground and immediately feels the pain in his back. He gasps, collapsing back to the ground. A scream rises in his throat as tentacles land around him, framing him.

The moment of realization is chaotic. At first he tries to scramble away, but they follow, and very soon after he realizes they're /attached/ to him. He tugs and he pulls and he screams until he succumbs to the hard fact he has to live with him.

As he calms himself, buries his head into his knees, the tentacles retract and hes just Jungkook, whimpering and afraid. When Taehyung finds him and hugs him close, crying and mad at him for disappearing, Jungkook swears to himself he'll never tell a soul the monster he's become.

●●●●●●

Jungkook's tentacles grow with him. They get thicker and longer, they ache too as Jungkook experiences growing pains and puberty. Jungkook hates them. He hates how they look, he hates how they feel, but most of all, he hates how they run his life.

He's sixteen and he has no friends, not really. He has people he sees at school, peers and acquaintances, but Jungkook is the definition of a recluse. He can't fathom the idea of anyone discovering what he is, and it's a burden that suffocates him.

The only person Jungkook really, truly has is Taehyung. And thank god for that. Taehyung keeps him company most days, and Jungkook finds all his comfort in his older brother.

But on the flip side of that, Jungkook has also come to realize he's festering awful feelings of attraction for Taehyung, too. He tries not to blame himself, knows it's only because he doesn't get enough exposure to other people, but it makes him feel dirty nonetheless.

It's a friday night, and Jungkook is home alone. Taehyung is off with friends and their parents have left for the weekend. It's times like these when Jungkook lets his tentacles out, feels the relief wash over him as he lets go and just sits in his room, free.

He's got his eyes closed, not quite sleeping, but not quite awake either. He doesn't hear the front door open, doesn't hear anything until Taehyung yells, "Jungkook!" from the hall. He sits up in a hurry, quickly tries to retract his shame.

But it's not a fast process. They retract slowly, and Taehyung is bursting through his bedroom door before they've fully sunk beneath his skin. "Kookie, I'm hooooome," Taehyung practically yells, obviously intoxicated. He sees Jungkook, and he bursts into laughter.

"I'm so drunk," he giggles, tossing himself onto Jungkook's bed. At this point, there are no tentacles to be seen anymore. "I totally saw-- nevermind, I'm drunk, don't listen to me," Taehyung says as he trails off into more giggles.

Jungkook laughs nervously along with him, cursing inwardly at two things: the stupid monster part of him he has to hide, and the way his stomach flutters as Taehyung drunkenly grins down at him.

He's not sure which is worse.

●●●●●●

The way Taehyung takes care of Jungkook never changes. When Taehyung decides it's time to move out, he takes Jungkook with him. At first, he wanted to decline. The thought of being alone withouy Taehyung meant no more constant hiding.

But the thought of being alone without Taehyung also made Jungkook feel instantly lonely. His stomach had flipped and churned and he rushed to accept.

Now Jungkook is 20 and he lives in a small two bedroom apartment with Taehyung.

It's nothing fancy, definitely nothing to write home about, but it's theirs and that's what matters. The kitchen is small and cramped, but they cook all the same. The bedrooms are cluttered and lacking, but they sleep all the same.

Their living room fits only one couch, but it still fits /something/, and that's the point.

Taehyung is easy to live with as a person, all of Jungkook's unhealthy obsession aside. He's tidy enough, quiet enough, and rarely has company.

Jungkook is somewhat sated, he finds his life to be just a little more cushy, and that makes him feel so much better about breathing.

They have separate bedrooms, Jungkook's far more dark and cozy, as Taehyung calls it. Jungkook feels like sometimes it's a little overbearing, but Taehyung likes it, so the decor never changes.

He's in this bedroom the first time Taehyung brings someone home. It's late, far past Taehyung's usual arrival home after work. Jungkook hears them stumbling through the door, all laughter and rowdiness. They make a quick venture into Taehyung's room and his door slams shut.

If Jungkook were to say he issn't trying to eavesdrop, he'd be lying. He pulls his blankets up to his chest and holds his breath, listening intently. Part of him knows what he's about to hear, but it doesn't stop the jealousy he feels when Taehyung asks, "How do you want me?"

He stews in festering jealousy as Taehyung fucks someone else, another man that isn't Jungkook. He imagines Taehyung's hands gripping sheets, imagines persperation on his skin. He hears how perfectly arousing Taehyung sounds and it's ultimately why he caves.

Touching himself to Taehyung is nothing new for Jungkook, he's been doing it for years. But this, getting off to the real, live sound of Taehyung and sex, is new.

At first it's simple. He jerks off like a typical person, fist around his cock, legs spread. He bites his lip to keep quiet and focuses on the way Taehyung moans for someone else.

But eventually, inevitably as always, his tentacles begin to creep.

He knows he's controlling them, but it's a subconscious effort. He gasps into his own touch as one warm appendage crawls up his chest, ridges brushing over his nipple. Another curls around his front and down to slither along the underside of his balls.

Its not something he actively thinks about, but this is one of the few positives of his monster side. It joins him in quiet, dirty moments like this and it takes everything in him not to cry out. He bites his lip a little harder, tastes the faintest amount of blood on his tongue.

The tentacle below goes just a little farther down, and a shiver runs up Jungkook's spine as he debates if he'll go /that/ far tonight. But then Taehyung is begging, and Jungkook decides. He let's out a shaky breath as the tip dips inside, no more than a fingers width.

If he goes any further, he knows the stretch will burn and the ridges will catch on his rim. He hasn't prepared for this, it wasn't even on his radar. But then Taehyung is undoubtedly coming, the sound of his climax overwhelming in its own right.

Jungkook takes a deep breath and let's it out in one big steady woosh as he pushes past his own resistance and sinks deep inside of himself. A choked sob rips its way out of him and the sound mixes with Taehyung's.

There are tears in Jungkook's eyes and rolling down onto his pillow as he comes, desperately trying to keep his chanting of Taehyung's name at a level only he can hear.

Coming down from his high means an absolute plummet. He goes from pure bliss to deep, aggressively self loathing in a matter of seconds. He slips out of himself with a wince through his soft crying and curls in on himself. Cum sticks to his blanket and he feels filthy.

He listens to the pair of men redress and eventually Taehyung is saying goodbye. From the sounds of it, the man is a coworker and Taehyung will see him on Monday.

Jungkook sobs as he listens to Taehyung clatter around the kitchen.

He's almost cried himself to sleep when there's a loud knocking on his bedroom door.

"Kook! I made midnight pancakes! Come eat some before you go to sleep or I'll be super duper sad."

And Jungkook? He's whipped.

He grins through his tears and for a moment, he forgets that pain, because Taehyung wants his company, and that makes his heart beat faster.

And maybe if Jungkook weren't so blinded by that, he might've had the sense to realize that Taehyung's words meant he knew the younger was still awake.

●●●●●●

"You look like shit," Taehyung tells him casually four mornings later over coffee.

Jungkook's not even surprised. He's barely slept night after night, nothing but guilt and masturbating and more guilt. There's hardly room for sleep.

"Thanks," he mumbles back.

"I'm serious," Taehyung says, and there's an annoying smirk on his lips that Jungkook wouldn't mind kissing away. "Are you not sleeping?"

Jungkook shrugs. "Sorta."

"Sorta?"

"Yes, Taehyung, sorta! Get off my back," Jungkook snaps.

Taehyung raises his hands by his head. "Woah, sorry. Just wanted to make sure you're okay. Mom'll have a bird if she finds out I'm not taking care of you."

Jungkook sighs. "I'm fine, okay? I promise. And I'm not a baby. You don't need to take care of me."

Taehyung picks up his coffee and chuckles into his mug. "You're my baby. Deal with it."

Jungkook almost chokes on his coffee, but he holds composure. Maybe his cheeks redden a little, but he hopes Taehyung doesn't notice.

Taehyung softens a little, pushes the bag of so-not-breakfast-food between them closer to Jungkook and spins it so the opening faces the younger. "You can talk to me, y'know. Work problems? Crush? Murdered someone?"

Jungkook glares from across the other end of the couch.

"I said I'm fine."

Taehyung huffs and grabs the bag back. "Fine. But I'm here if you need me."

Jungkook's heart swells.

A moment of silence passes betwen them, just the sound of morning game shows from the television, before Taehyung turns to face Jungkook.

"Can I tell /you/ something?"

Jungkook perks up, shovels a few more pieces of candy in his mouth. "Shoot," Jungkook says around the mouthful.

Taehyung's eyes grow wide with glee.

"Okay, so there's this girl that works nextdoor to my work. She makes the best sandwiches. Anyways, I think she kinda digs me?" Taehyung says, almost in disbelief. "I mean, it's pretty rare for me to find a girl attractive like that, but...I think I do?"

Jungkook's heart sinks into his stomach and all he can do is hope it doesn't show on his face.

"Yeah?" He asks, cursing the quiver in his voice.

"Yeah, she's like...really pretty? And I'm almost positive she'd say yes to a date if I asked."

Jungkook scrambles in his head to find the appropriate response. What would a brother who doesn't get off to their sibling say on this situation?

He plasters on a smile that he hopes sits straight on his face. "Why don't you...ask her out?"

He facepalms on the inside.

Jealousy is bubbling in him like molten lava, and it burns just the same. He feels his tentacles beneath his skin twitching, almost vibrating, and he struggles to keep a lid on himself from all angles.

Taehyung smiles at him, although it looks misplaced and concerned. "Thanks, Kook. I guess I will," he says quietly, and Jungkook blindly nods back. He's not even in the conversation anymore.

"I gotta...I have a stomach ache," he says, shaking his head as he stands. Taehyung watches him eith furrowed brows.

"Do you need me to run out and grab some tums or someth-"

"No! No. I'm fine. I-I just need to- Yeah. I'm fine," he stammers, giving Taehyung a quick tight-lipped smile before he's hurrying into his bedroom.

He closes the door behind him and exhales heavily.

And then he cries because Taehyung will have another date anyday now.

And then he cries because that upsets him.

●●●●●●

Taehyung's date happens later than Jungkook expected. Two weeks pass by and he's almost forgotten entirely. If anyone were to ask him, he'd say Taehyung must have never asked.

But then he catches Taehyung getting ready, and his heart sinks. He knows.

"Where you goin'?" He askes, propping himself against the bathroom doorframe. Taehyung glances up at him in the mirror and smiles.

"My date!" He says brightly, and when Jungkook frowns, he frowns too. "Did I not tell you?"

"Negative," he says quietly. Taehyung shrugs and goes back to buttoning his shirt.

"My bad," Taehyung says. "Must've slipped my mind."

"I guess so," Jungkook replies, the taste of bile in his mouth so very prominent.

"You want me to bring you home anything?"

"Nah, I'm good," Jungkook says shortly as he turns on his heels to leave.

"Hey, woah, stop," Taehyung says quickly, "What's wrong? I'm sorry I forgot to tell you, but it's not a big deal?"

Taehyung's eyes are wide and curious as he stares at Jungkook, like he's challenging the younger to give him a good reason.

Jungkook inhales and exhales.

"You're right, it's not a big deal. Have fun tonight, okay?"

Taehyung frowns at him. "Okay."

●●●●●●

It's almost two in the morning when Jungkook hears their apartment door open. As he expected, he hears a girls voice trail with Taehyung's.

Jungkook's heart sinks despite already knowing. He should've just gone to sleep, let slumber protect him from what he's about to endure.

She's all giggles and compliments, high pitched and flirty. Jungkook can picture her tucking her hair behind her ear or touching Taehyung's arm softly and playfully.

He buries himself deeper into his blankets as he waits for them to head to Taehyung's room.

But they don't. They're in the living room. Taehyung offers her a drink and she accepts, telling him how gentleman of a host he is. She giggles and he can picture Taehyung grinning.

Glasses clink, they chatter about their date. Good food, good music.

And then it falls quiet, and Jungkook strains to listen, even though he knows it'll make him feel like shit. He feels his tentacles twitch beneath his skin as if they know he's about to sin.

The first sound Jungkook hears is a soft, womanly sigh, as if Taehyung is planting kisses in all the right spots on her skin.

The second sound he hears is her quiet whine, as if Taehyung has touched her in all the right places.

The third sound is clothes hitting the floor.

Taehyung is /actually/ going to sleep with a woman in their living room.

God, Jungkook, hes so mad. He feels the anger bubbling over and he wants to scream. But the thought of Taehyung so openly fucking in their living room makes Jungkooks dick twitch with masochistic interest.

He shuts his eyes and takes a deep breath.

No. He will not touch himself. Not when he's this angry. He already feels his tentacles begin to emerge and he tries to hold them back.

"No," he whispers to himself. "No."

In Taehyung's bedroom is one thing, but in their living room? Where Jungkook eats his lunch?

Or at least, that's what Jungkook tells himself has him so angry. He's too cowardly to admit his real problem.

He sits up in bed.

He's gonna go out there. He's gonna go out there, he's gonna wander into the kitchen, because hey, people get thirsty at 2am. He's going to ruin their good time, and he's gonna feel perfectly fine doing it.

Jungkook gets out of bed and quietly pads across his room. He twists the knob quietly and tiptoes down the small hall towards the kitchen. He has to pass the living room to get there.

He tells himself he won't look, but who is he kidding?

The minute the living room is in eyesight, he turns his head.

She's on her back, ankles tossed over Taehyung's shoulder as he fucks her in slow, deep thrusts. She's still moaning like it's the first time she's been touched in years.

Jungkook wishes he could look away.

But all he can do is stand there, frozen, watch Taehyung's naked body move the way that it does, sensual and far too practiced for the likes of a random woman.

All he can do is stand there and watch as Taehyung lifts his head only slightly, just enough to catch his gaze.

Jungkook's heart beats wildly in his chest. He's been caught staring and he needs to run. Now. But his feet won't move. He needs to figure this out now or-

Taehyung smirks.

Taehyung smirks at Jungkook, and he picks up his pace, thrusting noises out of the woman below him.

He holds Jungkook's gaze as he does so, as tiny grunts leave his throat.

And without breaking eye contact with Jungkook, not even once, Taehyung asks, "You like that?"

Jungkook whimpers in the back of his throat, so quiet only he can hear it over the sound of skin on skin.

He stares wide-eyed at Taehyung, doesn't move a muscle. The only part of him that responds is his traitor of a dick.

The woman under Taehyung responds, chanting a cheap mantra of "yes yes yes" under her breath, but she's the only person in the room who thinks the question was for her.

Taehyung looks amused beyond all comprehension. He's giving Jungkook an open-mouthed smirk that has his skin breaking out in goosebumps.

Is this the ultimate version of eyefucking? Surely this isn't normal by any person's standards?

Jungkook's mind is reeling. What's happening?

He shakes his head. He's not sure what he's shaking it for, but he shakes it nonetheless. Taehyung pays no mind to that, just keeps on holding gaze and pace.

Taehyung's breathing picks up, and Jungkook notices the falter in his hips. Taehyung tosses his head back, the very first time he breaks eye contact. "Fuck, I'm coming," he groans to the ceiling.

And that's Jungkook's cue to leave.

He wants to see it, wants to see it more than anything, but he absolutely cannot. He could never erase that from his mind.

For once in his life Jungkook does himself a favor, and he finds it in him to move. He turns on his heels.

"Look at me," he hears Taehyung demand, and it goes straight to Jungkook's groin. He shudders on the spot before he heads to his room and doesn't look back.

As soon as Jungkook closes his door behind him, his knees hit the ground, spread as wide as his pajama pants will let them. His hand is in his pants before he can even process the thought, stroking quick and deliberate.

His tentacles begin to appear and they travel around him, reaching for any extra pleasure points they can find, but it's too late. Jungkook is already coming with a loud moan he doesn't even bother to stifle, covering his hand in sticky and slick.

Outside his bedroom is shouting, but the ringing in his ears makes it hard to decipher. She sounds mad, he sounds apologetic. She's yelling and he's talking in a rush. The only thing Jungkook catches is, "I'm sorry, I'll call you."

After stripping off his soiled pants, Jungkook crawls into bed amongst the commotion. He pulls the blankets up high, takes a deep, shuddering breath, and retracts his tentacles. They try to resist, but ultimately, away they go.

The apartment falls quiet and the only thing that's making any significant noise is Jungkook's heart in his ribcage as Taehyung pads down the hall. His footsteps aren't heavy, but Jungkook has come to learn them.

He doesn't say anything when he enters Jungkook's room, doesn't even knock. He just closes the door behind him gently and crawls into Jungkook's bed next to him.

Jungkook knows he should feel awkward, but no matter what, Taehyung is comforting to him, and he feels relaxed.

Taehyung crawls under the blanket and tosses an arm around Jungkook and it feels like a ray of sunshine beating down on him on a hot summer's day. Jungkook feels a lump in his throat as that thought crosses his mind.

"Sorry, that was weird," Taehyung whispers.

Jungkook wants to agree, he wants to disagree, he wants to laugh or maybe thank him, but instead he coughs to clear his throat and awkwardly says,

"I'm not wearing pants."

Taehyung huffs a laugh that ruffles the hair on the back of Jungkook's head. "That's okay. Your bed, your rules."

A few moments of silence pass by. Jungkook is waiting for Taehyung to say something, anything, but he's quiet. So Jungkook takes the plunge.

"Tae... Taetae, what just happened?"

Taehyung's fingers on his tummy draw small, comforting circles that make it hard for Jungkook to keep his eyes open.

"What do you think just happened?" Taehyung asks kindly.

"I-I don't know. I just wanted water and you-"

"That's bullshit." Taehyung says abruptly, but just as kind.

Jungkook stops short, and breathes a tiny, "What?"

⚠️[Slight dubious consent ahead]⚠️

Taehyungs hand on his stomach trails over Jungkook's hip and down his leg nestled against his brother. His lips are on the back of Jungkook's neck, leaving small, light kisses that make Jungkook feel dizzy.

He's suddenly very painfully aware oh how bare his lower half is.

"If you tell me to stop, I'll stop. I'll go to bed and when we wake up, we're just brothers. But if I've had any awareness over the past few years, you won't tell me to stop."

"Tae-"

"I don't think you could if you tried."

"Why?" Jungkook asks, but he already knows the answer. The fear in his belly is alive and his body tenses under Taehyung's touch.

Taehyung knows.

He wonders if Taehyung feels his trembling under his fingertips.

Taehyung inhales deeply, one hand still massaging the skin of his leg while the other tangles gently in Jungkook's hair and tugs, just enough for Jungkook to gasp.

"Because you want me."

Unable to respond, Jungkook simply whimpers pathetically. He does, he wants Taehyung, wants him so bad. And now Taehyung knows that too.

And Jungkook is confused, because almost everything that's happening is telling him that Taehyung wants him too.

But the fear of rejection keeps him quiet, keeps him almost frozen in place, unsure and insecure. He's hard and he's leaking and he's embarrassed and he's terrified. He feels like he's losing control over himself, and if he does, he knows his monster will emerge.

"Tell me I'm wrong. Tell me you didn't get off to the sounds I made last week. Tell me you didn't cry afterwards because it wasn't you."

"Tae, I- I-"

Taehyung's hand travels from the safe skin of his hips to the front of his thigh, dangerously close to sin.

"Tell me you didn't walk out there tonight just to see what it looks like. Go on, tell me, baby."

Jungkook heaves a sob as it all becomes a little too much. Baby...

"I can't," he rasps, and Taehyung hums, placing a kiss just behind Jungkook's ear.

"Can I tell you something then?" He asks into that ear. It's rhetorical, and Taehyung continues.

"I think about you a lot. I think about you finally giving in and begging me to touch you. All desperate and cute and just for me."

He does it without thinking. Jungkook grinds back into Taehyung, who easily grinds right back and Jungkook moans as if he has nothing to be ashamed of.

"There you go, darlin'. Take what you want," he whispers.

He's losing it. Jungkook is losing his mind.

He starts to panic as he feels the appendages under his skin begin to move. He wonders if Taehyung can feel it too, and that's what has him sitting up in a panic.

"No!" He says loudly and Taehyung quickly retracts his hands, also propping himself up in concern.

"Okay!" Taehyung says gently. "We can stop, Kook. I'm sorry, I genuinely thought-"

"Fuck. Fuck fuck fuck," Jungkook whimpers, and there's nothing he can do. He can't get out of bed fast enough. He's barely got one leg near the edge of the bed.

His tentacles emerge through his shirt with a vengence, almost painfully so. Every bit of strength Jungkook has crumbles and he moans loudly at the sensation of being released, even if against his wishes.

"Taehyung, you need to go-" he tries, but it's useless.

Taehyung gasps as the six long and dark tentacles stretch out around him, searching for something unknown.

Jungkook is in hysterics. "Please, Tae. Please, don't hurt me, please don't-"

"Holy fuck, Jungkook," Taehyung breathes, eyes wide and mouth agape.

The tears on Jungkook's face burn on the way down. He scrambles off the bed to put distance between them, paying no mind to how half-naked he is.

"I'm so sorry, Taehyung. I'll leave, I will, just please don't tell anyone, I can't-"

"Shhhh," Taehyung soothes, slowly making his way off the bed. "I'm not going to hurt you and I'm not going to tell anyone, okay? You're okay," He says softly.

Jungkook watches, trembling and horrified as Taehyung stands and steps into his space, reaching a tentative hand out to lightly run a finger along the end of asingle tentacle. It twists around his finger and Taehyung smiles.

"I always hoped you'd show me someday."

"You knew?" Jungkook asks weakly, hands shaking at his sides.

Taehyung smiles fondly at him. "Since you were sixteen years old."

Another sob forces it's way out of Jungkook. A sob of relief and disbelief. "What?"

"You don't remember?" Taehyung asks.

The older strokes a little higher along a tentacle, watching Jungkook carefully for any signs of discomfort.

Jungkook just blinks at his brother, dazed as he witnesses Taehyung, well, pet him. It's something he never imagined he'd see in his wildest dreams.

"You were sixteen," Taehyung explains, "and I busted into your room like a drunken fool."

Jungkook remembers now. His shoulders sag as relief washes over him. Taehyung has known since he was /sixteen/.

Taehyung has know for four years, and in those four years, Taehyung has loved him, protected him, taken care of him.

The younger buries his face in his hands, and the next sob to leave him is a happy one.

"Hey, it's alright," Taehyung coos, gently prying Jungkook's hands away. He lifts Jungkook's head with two fingers and smiles. Jungkook realizes how much closer he's gotten. "I've got you, ok?"

Jungkook sniffles and nods obediently.

Taehyung smiles again. "I told you you were my baby. Deal with it."

And then Taehyung kisses him, so softly it tickles the slightly chapped skin of Jungkook's lips. It really does feel like all of Jungkook's birthdays have come at once.

Deepening the kiss is as easy as breathing. Taehyung is inviting and shocking. He's the exact opposite of what Jungkook expects. Initiating. Leading. When Taehyung takes a step back, Jungkook can't help but follow.

A tentacle reaches out and brushes along Taehyung's cheek, and Jungkook knows it's a subconscious desire. Taehyung leans into the touch with closed eyes.

"I've thought about these too, you know," he sighs.

"How?" Jungkook asks, and it's completely innocent. He's never believed anyone could think of them in a positive way, and he's not about to start now.

The skin of Taehyung's cheeks darken and Jungkook can feel it heat up under his foreign touch.

Taehyung takes a moment, hums in contentment before he opens his eyes, instantly seeking out Jungkook.

"They're kind of hot," he says, and Jungkook balks.

"They're not hot, Tae," Jungkook replies hesitantly. "They're disgusting."

Taehyung turns his head and plants a single kiss on the smooth side of the tentacle against him. A shiver runs up Jungkook's spine.

"Can you feel that?" Taehyung asks curiously.

"I can."

"Can you control them?"

"Most of the time."

"Can you touch me?"

Jungkook's breath hitches in his throat, because he honestly can't think of anything he'd rather do. He eyes Taehyung carefully for a moment, sees how unwavering Taehyung's confidence is.

And then he runs a tentacle down Taehyung's chest.

It's slow, so slow, and Taehyung groans as it glides against his clothed chest. It travels down until it reaches the hem and then it dips below and back up, and the noise Taehyung makes, this sort of choked whimper, makes Jungkook's cock twitch back to life.

"Just like that," Taehyung encourages softly and Jungkook listens as best he can. He explores Taehyung with his tentacles, feels the dips and curves and harder lines of Taehyung, spots he always fantasized of touching like this.

"You can undress me," Taehyung says. It's a husky statement that feels more like a demand. Jungkook only hesitates slightly, just enough for Taehyung to nod encouragingly.

His tentacles begin to descend again.

"No," Jungkook says firmly, and Taehyung startles. "Sorry, I was talking to them," Jungkook says with a sheepish smile, and Taehyung seems to relax as Jungkook reaches forwards with his hands to pull Taehyung closer by the loops of his jeans. "I wanna do it."

Taehyung hums as Jungkook fumbles with the zipper. "How long?"

"How long, what?" Jungkook asks back absentmindedly.

"How long have you wanted this?"

"Longer than I care to admit," Jungkook replies with only a quick, flitting glance into Taehyung's eyes.

Taehyung's clothes hit the floor with so much care, the moment almost feels like it's allowed to happen, like nobody would ever question what they're about to do because the intimacy is so heavy and so real. Jungkook feels Taehyung's presence softening the dirty and the taboo.

He has very little control over the way his extra extremities instantly seek out Taehyung's warm, bare skin. If it was up to his guilt, he'd still be standing there, just looking at best, but it's the feral part of him that takes no moment to consider.

If his soft little sounds of appreciation are anything to go by, Taehyung doesn't mind in the slightest. His cock is hard already, maybe he was already hard to begin with. But either way, Jungkook thinks Taehyung looks like he could be devoured.

Taehyung heads back to the bed, beckoning for Jungkook to follow. Jungkook strips his ruined shirt off (with a little difficulty) and climbs into Taehyung's lap, straddling his brother with a tinge of embarrassmemt.

"Feels weird," he mumbles. Taehyung laughs.

"It is weird, Kook. But don't worry about it, ok? Let me make you feel better."

Jungkook swallows thickly, glances down at his aching, leaking cock that brushes against Taehyung's abdomen.

Taehyung takes the hint quickly, wraps a hand around it and strokes Jungkook gently.

"Is this what you want?" he whispers, and Jungkook nods, choking back a moan somewhere in his throat. "What else, baby? Tell me what you want and I'll give it to you."

"What about what you want?"

Taehyung takes a long, meaningful glance at the tentacles that still explore his body freely, then back to Jungkook. "Next time," he says simply, but deliberate in a way that reassures Jungkook there /will/ be a next time. "You're captain tonight."

For a moment Jungkook considers what he wants. There's been so many fantasies, so many options. Once he's settled on one, butterflies rage inside of him as he reaches into his sidetable drawer for his lube. Taehyung watches him quietly.

Jungkook squirts the liquid into his palm and raises a tentacle to coat it. Taehyung seems curious as Jungkook does so, as if he's expecting the slicked appendage to come for him. But instead, it twists back around behind Jungkook, and Taehyung's eyes widen.

"Jungkook, are you-"

"Hhhn god," Jungkook groans as the tip of the tentacle barely pushes inside himself. It works slowly, in and out, little by little, working him open with practiced care.

Taehyung seems at a loss for words as he watches Jungkook's face closely.

He keeps stroking Jungkook through it, not enough to overwhelm him, but just enough to accompany the discomfort.

Jungkook feels the lube gathering on his rim, dripping down the inside of his thighs slowly. He used way too much.

When he feels like he's done enough, he lifts himself up on his knees, reaching behind him to wrap a hand around Taehyung's cock.

Touching Taehyung for the first time like this makes him falter. His cock is warm in Jungkook's hand and it makes his heart beat faster.

Taehyung seems to notice his hesitation. "It's okay," he reassures.

"No it's not," Jungkook whispers, so quietly he's not even sure if Taehyung heard him, and then his tentacle slips out and he lines Taehyung up.

There isn't a sound in the room as Jungkook sinks down, neither of them are even breathing. He feels Taehyung stretching him, filling him inch by inch, and it's nothing short of euphoric.

"Hhhh-fu-uck," Jungkook stammers when Taehyung is bottomed out.

Taehyung exhales sharply, jaw tense, his hand unmoving on Jungkook's cock. He holds Jungkook's gaze, eyes dark and fond all at once.

"Say something," Jungkook pleads quietly, his confidence rapidly plummeting as Taehyung stares.

Taehyungs one hand leaves Jungkook's cock and they both find his hips. He lifts Jungkook with his legs, hold Jungkook steady with his hands, and pulls out slowly, watching carefully as Jungkook's eyes flutter shut, and then he thrusts back in.

"I'm gonna take care of you." Jungkook nods, places his hands on Taehyung's chest to hold himself up as he's fucked. "Always have, and I always will," Taehyung grunts.

Jungkook is overwhelmed. Everytime Taehyung thrusts into him, he feels a part of him crumble.

"You don't have to hide anymore," Taehyung says, slowing his thrusts, making them deeper, more precise. "You're not a monster."

"Tae-" Jungkook sobs, nails digging into the soft skin on Taehyung's chest.

Taehyung holds Jungkook firm, and he rolls them over with ease. The air rushes out of Jungkook's lungs as his back hits the pillowy mattress, his tentacles splayed around him like artwork. For a moment they seem stunned, too, and then they're back to reaching for Taehyung.

Taehyung grins down at Jungkook, gives him a cocky wink that makes Jungkook roll his eyes.

Taehyung pushes Jungkook's knees to his chest, and thrusts sharply. Jungkook means loudly, all sense of playfulness knocked out of him.

As his brother fucks him, Jungkook's mind starts to white out. He's so sensitive, so overwhelmed, so taken by that fact this is actually happening.

Taehyung is dedicated and attentive and the sounds he makes are enough to distract him.

So it's Jungkook's fault he doesn't notice. He doesn't notice that his tentacles have grown more aggressive at a steady pace, no longer simply petting Taehyung's skin.

It's his fault he doesn't feel them begin to seek out penetration.

⚠️dubcon / noncon⚠️
[idk what to tag it as, but its not pleasant]

It's his fault he barely registers the "Jungkook, wait-" before Taehyung wails into their dark room, a loud, pained sound the snaps Jungkook back to reality.

The reality where Taehyung is collapsed on his chest with a tentacle deep inside of him.

It pulls back slightly and goes right back in, another cry from Taehyung. "Jungkook, please-" he sobs.

Jungkook feels panic rise in his chest. He tries to stop, but the onslaught persists. "I can't!" He says hurriedly.

Jungkook's not sure why he can't. His tentacles have never done anything he didn't want to do. They've always been a part of him, always doing exactly what Jungkook needs, even if Jungkook couldn't admit it.

He thinks Taehyung knows this too.

And so it's with great guilt that Jungkook finally realizes he can't stop...because somewhere, no matter how deep, he doesn't want to.

He runs his hands through Taehyung's hair gently. "I'm so sorry," he whispers. He feels Taehyung's tears gather on his chest.

"It hurts," Taehyung says weakly as a particular thrust has Taehyung jerking slightly.

"I know, I know it does," Jungkook says back. "It'll feel better, I swear, I promise, Taehyung."

Taehyung lifts his head to look at Jungkook, who looks back at him. "I love you," he whispers, "and you're still not a monster."

Jungkook laughs bitterly, feels a bubble of anger rise in him. His monster is hurting him and Taehyung is /still/ taking care of him.

"Yes I am, Tae!" And as if on cue (and it probably is), the tentacle that's penetrating Taehyung goes so hard, Taehyung moves up Jungkook's body with a gasp that rattles Jungkook's bones.

Taehyung's brows furrow as he concentrates on allowing the intrusion, desperately trying to find a way to ease the burning stretch.

Jungkook keeps stroking his locks of hair, it's all he can do.

And when Taehyung lifts himself up on two shaky arms on either side of Jungkook's body, Jungkook watches carefully.

He's breathing heavily, so heavy Jungkook is afraid he might pass out. And then Taehyung smiles, ever so slightly.

Jungkook's eyes are wide and attentive, concerned. Taehyung hangs his head, his body rocking slightly as he's penetrated, small puffs of air being knocked out of his lungs.

"It's okay," he whispers, "it's okay, give me more."

Jungkook shakes his head. "No, Tae-"

"I'm fine, I'm fine now. Come on, Kook, you can do better than that."

Still buried inside of Jungkook, every rock of Taehyung's body makes Jungkook feel alive. He contemplates it only for a moment, and then he gives in.

The way Taehyung moans as the tentacle pushes inside of him impossibly deeper makes Jungkook moan too. Taehyung pants above him, takes the rough fuck so, so well.

He wraps a hand around Jungkook's cock, a sloppy, unfocused handjob.

Not that Jungkook's complaining. It still feels like heaven. It still feels like Taehyung's hand around him, and Taehyung buried inside him.

He comes so suddenly he can't even give warning. It hits him hard and he sees stars in the back of his eyelids.

A moan tears its way out of him and he's forced to rip his eyes away from Taehyung as his head tips back onto the pillow with the force of it.

Taehyung strokes his cock still, dragging the cum down his shaft. "Fuck," his brother curses as Jungkook's chest heaves.