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"Puberty?" Jimin asks, skeptical.
"Yeah, exactly."
Jimin looks Taehyung up and down. A smirk tugs at his lips. "Taehyung-ah. You already—"
"Alien puberty!" Taehyung whines, realizing what Jimin is being weird about. They are, after all, in their early 20's. So yes, they've both been through that puberty before. "It's more about mating and- and breeding. Like a rut. I don't know how soon it will hit, but I already feel more sensitive, feels like." Taehyung pauses when the look on Jimin's face turns soft, and he nervously runs his fingers through his hair. "Feels like more than just being horny. Like I really need it."
"Tell me," Jimin says, taking Taehyung's hand, pulling him down onto the bed, and so Taehyung does.
—
Taehyung explains slowly, pausing to clarify when he uses words that Jimin doesn't understand, what will happen during his rut.
Jimin already knows about Taehyung's tentacles, of course. Even before they were a thing, just horny and curious in hotel rooms or under the covers when Hoseok was already asleep, they would explore. Hands down pants turned into Taehyung's shy tentacles slipping around Jimin's cock, around his own, jerking them off with a new, wet touch or playing with their nipples, even teasing down over Jimin's hole.
It was always giddy, forbidden fun, full of heat and trust and blossoming feelings, but Taehyung explains how this will be more intense.
"My, uh, biggest tentacle. My mating tentacle. It can release eggs now. When I'm in rut, that urge to lay them inside someone is— already I can feel it, how much I need it." Taehyung touches low over his stomach. He isn't sure exactly where the eggs form, but there's a heaviness already, deep inside him, near his groin.
Jimin's breathing is shallow, his cheeks pink. "You feel like you need to fill someone with them?"
Taehyung nods, cock jerking in his shorts. He hopes Jimin can't tell, is afraid to look at Jimin's lap to see if he's hard already too. "They're, ah, blanks. I'm on birth control, they can't actually be fertilized, but my body doesn't know the difference. They'll still come out, I'll still want to, you know." Taehyung flushes. "Fuck them inside someone."
"God," Jimin says, voice rough. "Taehyung-ah. Want that."
Taehyung goes still, lips parting in surprise. "What?"
"I want that, your eggs."
"You're- You're sure?" Taehyung hadn't dared to hope Jimin would say yes. He was ready to beg for a compromise, Jimin catching the eggs in his hands and pretending for Taehyung's sake or something.
"It's, ah. It's not the first time I've thought about something like that..." Jimin whispers, and Taehyung's eyes widen.
"Holy shit."
"Don't make fun of me! You watch hentai too!"
"Jimin-ah, oh my god, I'm literally an alien. I lay eggs. I'm not going to make fun of you," Taehyung whines, burying his face in Jimin's hair, breathing in the gentle human scent of him. "You have to tell me if it's too much, if you change your mind."
Jimin smiles then, a cute smile, and Taehyung gives in to the urge to kiss his soft cheek. "I will. But I love you, Taehyung-ah. Let me help."
—
Taehyung's rut hits a few days later when he's already holed up in his room, naked and sweating and aching, impatient. It hurts to keep his tentacles tucked away so he doesn't, and watches the heat in Jimin's stare when he undresses, climbing into bed with Taehyung.
"I'm here," Jimin says, and relief and excitement both wash through Taehyung, leave him warm and wanting, when their lips meet.
Taehyung's tentacles won't stop stroking at Jimin's bare skin, leaving wet trails of slick, Jimin's body glistening with it while they make out. Taehyung just sighs and gives up control to his tentacles. He could pull them back if Jimin asked him, he would in a heartbeat, but it feels so good to let them do what they want, too. To let them explore Jimin like they would a potential mate, finding out what makes him shiver, what makes him moan.
"Baby," Jimin laughs, not unkindly, when Taehyung won't stop whining. "Do you want to fuck me with them? Stretch me for this?" Jimin's hand circles around Taehyung's lowest tentacle, the thickest one, with a sensitive slit at the end for his eggs to come out.
Taehyung groans, deep and pained. "Please. Please, let me get you ready."
Even with the frenzied need clouding his thoughts, Taehyung is still careful. His tentacles pulse more slick, dribble and slip over Jimin's hole until he's moaning for it, muscled legs spread, a pretty blush trailing all the way down his chest.
Taehyung wants him. Not just for this, for his rut, but for everything. Taehyung loves him so much.
"Yeah," Taehyung breathes out when the first tentacle pushes its way into Jimin's hole, the glide so easy with how wet Jimin is. Taehyung uses his hand to stroke Jimin's cock, loves that it's thick but smaller than his own, that his grip nearly engulfs it. "Yeah, there you go."
"Feels good," Jimin moans, his own voice low with his arousal, his breaths stuttered. "T- Taehyung-ah. More."
It feels good for Taehyung too, fuck, the clench of Jimin's hole around his tentacle. Not quite as sensitive as his cock but close, that hot, gripping tightness.
Taehyung eases in a second slender tentacle, watches Jimin stretch for it, feels the throb of Jimin's cock under his fingers.
He really likes this. Taehyung is fucking Jimin open with two tentacles, his body rocking into each thrust, and Jimin's moans are wild for it.
Taehyung pants through the intensity of the pleasure, the climbing heat. The urge to breed gets frantic, until there's a pressure beneath the widening slit of his mating tentacle, so sensitive, ready to release eggs.
The two tentacles draw out slowly from Jimin's hole and Jimin lifts his head, blinks up at Taehyung with a confused look. "Wait, what—"
"It's ready," Taehyung says, voice low and excited. "Jimin-ah, can- can I put it inside you now?"
"Oh." Jimin stares right at Taehyung's biggest tentacle, a little bigger than Taehyung's cock, and gives him a dazed smile. "Yes, please. Feels weird being empty, fill me back up, mmm." Jimin's head drops back and Taehyung watches as his mating tentacle teases and rubs at Jimin's hole, feels the way Jimin's body gives under the push to let Taehyung in.
He fills and fills Jimin, sinks into that clenching heat as arousal twists inside him, watching Jimin's head drop back with a groan, his swollen lips parted, eyes squeezed shut.
Jimin takes him so well, begging Taehyung not to stop, begging to be bred and stuffed with Taehyung's eggs.
And— fuck. It goes straight to Taehyung's cock, hearing Jimin's sweet, desperate voice ask for something so intimate, wanting it so badly.
The pleasure drags, searing hot with each egg that begins to slide down Taehyung's tentacle, the way Jimin tries to clench around him and gasps at the bulge.
"Oh, Taehyung-ah, it's—"
"Fuck, that's it, gonna breed you so full," Taehyung groans. It's so intense, almost burns when the slit of his tentacle gapes to let the egg through. But the relief is a new kind of bliss, feeling the egg pop out, knowing it'll be kept warm and safe inside Jimin, his soulmate, his mate.
Taehyung fucks Jimin full of all six of his eggs like that, each one sliding down, easing out of his tentacle with a shudder. Jimin writhes underneath him, comes with a gasp as Taehyung fills him, his cock spilling wet over his own belly.
"Don't stop, please don't stop," Jimin pleads when Taehyung starts to pull back, and Taehyung leans over Jimin's body, sucks a wet kiss over Jimin's flushed throat.
"I won't, but I have to use my cock now, angel. I'll fill you again, I promise."
Jimin sighs. When Taehyung straightens back up, Jimin is still hard, his hole wet and open enough that Taehyung can drag his tentacle out and sink his cock right inside.
The eggs are in deep, but the head of Taehyung's cock still nudges at the clutch of them when he thrusts. He wonders if Jimin feels the fullness of carrying Taehyung's brood or if he's too lost in the thick drag of Taehyung's cock, the overstimulation of getting fucked when Jimin has already come.
Taehyung works himself up to his own orgasm, is awash in heat and need and breeding pleasure, fucking Jimin roughly and choking out how beautiful he is, how tight, the perfect mate to carry his young.
"Please," Jimin begs, legs wrapped around Taehyung's hips, back arched off the bed. Jimin is flushed, sweating, face scrunched in pleasure, and Taehyung—
Taehyung can only moan when he starts to come, spilling inside as his hips jerk, flooding the eggs with cum that his instincts believe could fertilize them.
Jimin takes it all so well, belly bulging a little with how much Taehyung has filled him. His eyes are heavy, lips parted and wet, sinfully pretty. "Oh..."
"Can you feel them?" Taehyung asks excitedly, still trembling from the intensity of his orgasm. Jimin nods, his smile dazed, so sweet.
"You filled me so well, Taehyung-ah. Bred me so full."
Taehyung moans and nuzzles at Jimin's neck. He reaches down between their bodies to rest a hand over Jimin's tummy, indulges his weird emotional connection to the eggs even if he knows they're just blanks. They're still his blanks and Jimin took them so well, would keep them safe as long as Taehyung asked him to.
Taehyung sighs. He presses sweet kisses at the side of Jimin's neck, all warm and tingling from how happy he is, his instincts satisfied.
"Jimin-ah."
"Mmh?"
"Do you think you can push them out now?" Taehyung asks in a whisper.
"Push..." Jimin's eyes go wide, his pink lips parting. "I have to— they don't come out on their own?"
Taehyung huffs out a laugh. "Not really, it's better to get them out now. But it shouldn't hurt or anything, my cum makes it all slippery."
"Are you going to watch?" Jimin asks, voice small, and Taehyung kisses his soft cheek, whines a little because Jimin seems distressed. Suddenly shy.
"I'll help. I won't leave you to do it by yourself, I don't care how embarrassed you are."
"'m not embarrassed..."
Taehyung pulls back, his softening cock slipping from Jimin's hole. "Then sit up a little against the pillows? And spread your legs wide for me."
Jimin does, face blushing pink. He rests one hand low on his belly as well, maybe not even consciously, and a fierce kind of protectiveness surges through Taehyung.
God, he really wishes he could raise young with Jimin. Maybe some day.
Taehyung can already see some of the mess leak from Jimin's hole, a slow dribble of it, and his tentacles — even more than his spent dick — ache with the desire to fuck Jimin again. Taehyung hopes Jimin will let them, even when he's out of his rut. He has a feeling, after Jimin's hentai comment, that the answer is yes.
"I'm going to jerk you off," Taehyung explains, "and when you come it should help start to push them down, just inside."
"Okay," Jimin breathes out. His toes curl and his thighs tremble slightly when Taehyung starts stroking Jimin's cock, pushing gently at his belly too until Jimin blurts out it might make him pee.
(Taehyung actually, really wouldn't mind that, but Jimin doesn't sound too sure about it, so Taehyung mentally files that away as a conversation to have later.)
The fingers of Taehyung's other hand trace gently over Jimin's hole, rubbing at his rim and smearing cum and slick as he does.
It doesn't take Jimin long to come. His breath hitches and his moan is drawn out, high, his cock pulsing in Taehyung's grip and spurting a smaller amount of cum than before over Jimin's belly.
"I think—" Jimin is still gasping for breath, hips shifting.
"Can you feel them moving inside you?" Taehyung asks. It's— fuck, it's so hot, watching Jimin shake through his orgasm and fight to keep his legs open. Taehyung lets two of his tentacles grab hold of Jimin's knees, keeping them spread, and Jimin's head drops back with another moan.
"I think it's coming, a- ah—"
Taehyung moves his thumb until it's brushing the sensitive skin above Jimin's rim, gently massaging it, and then he watches and waits.
The first egg comes slowly, the tiny gape of Jimin's used hole opening slightly for it before it sinks back inside, and Taehyung can't help smiling, fondness and arousal. "Jimin-ah."
"It's so close," Jimin whines. His eyes are squeezed shut, cheeks an even brighter pink than before. "Feels too big."
"It's not, I promise. They only swell a little bigger than golf balls."
"Fuck."
"Push again, try for me. Not too hard, just let it open you."
Jimin's cock twitches. Taehyung loosely strokes it to help distract Jimin from what he's doing, and realizes Jimin still hasn't gone soft, even after two orgasms.
Jimin's moan sounds like it's torn from his throat, and then his hole is stretching again, widening with the peek of the egg.
"There you go, there you go," Taehyung babbles, low and excited. The egg doesn't sink back in this time.
It pops out from the little clench of Jimin's hole and onto the towel on the bed, slick and pale, probably so warm to touch from the heat of Jimin's body.
Taehyung's heart pangs, but he ignores it. Not babies, they're not really his babies.
"There's more," Jimin chokes out, reaching down to brush his own small fingers over his hole like he's trying to feel for them. "How many...?"
"Five more to go."
"Oh god."
"You're doing fine," Taehyung tells him, stroking Jimin's cock slowly, watching his hips shift and his hole start to stretch again for the next egg. "Yeah, just like that, you're perfect, see? A natural at this."
"It feels—" Jimin cuts off, licking his lips.
"Feels good?"
Jimin nods. His eyes flutter shut again when the egg stretches him wider just before it's squeezed out. "Fuck. God. They press right into that- that spot inside, you know. Feels, nng."
From the tension in Jimin's muscles, the way he bears down, Taehyung can tell he's pushing. He imagines what it feels like for Jimin, to have them pressing at his walls, if each time Jimin clenches up it's just to squeeze the eggs into his prostate.
Taehyung forces himself to stop imagining Jimin stimulating himself with the eggs before he gets hard again. Thankfully, one orgasm is enough to wear Taehyung out for a while, when he's in rut like this.
"That's it, push them all out for me, just don't strain too hard. They'll come out when they're ready."
"H- How many more?"
"Four more." Taehyung gives Jimin's cock a tight stroke. "Do you want to come again?"
"Don't ask me that, oh, I'm not trying to—" Jimin's voice has gotten so raspy, his belly heaving with his short breaths.
"Trying to what?"
"Get off on this!" Jimin gasps. The third egg starts stretching him then, the shiny head of Jimin's cock drooling pre-cum as his rim widens for the egg, the gripping tentacles keeping Jimin's trembling thighs open for when the egg slips out.
Jimin pants. He looks more wrecked than ever.
"So beautiful," Taehyung tells him with complete sincerity. "I'm so lucky you took my eggs, Jimin-ah."
"TaeTae," Jimin whines. There are tears at the corners of his eyes. "I don't know if I can, it's- it's so much, they feel like too much."
Taehyung strokes Jimin off faster. "You can."
Jimin groans and Taehyung watches his rim clench, wonders where the remaining eggs sit inside him now, if they're all just inside his hole or still deeper.
Taehyung sees a glimpse of white of the fourth egg and then Jimin is coming, crying out, the egg sinking back inside as Jimin's hole spasms.
"Fuck!" Jimin moans, body shuddering through his orgasm, the tentacles the only thing keeping his legs open. Taehyung can feel the strain, how much Jimin's thighs want to close. "Oh god, it's just- just there, Tae—"
"Push," Taehyung says. He lets go of Jimin's cock and spreads his cheeks wide with his hands, keeping him open.
"If they're shoved into your prostate right now they're probably close, yeah? Just give me some little pushes, baby, work those eggs out of your tight hole."
Jimin whines and nods, and Taehyung could groan in pleasure at the sight of it, when the next egg pushes through, stretching Jimin wide, gaping.
Another egg follows right behind it, but Jimin clenches up before the last one can slip out. Taehyung saw it, knows it's tucked just inside, ready to be pushed out.
"One more," Taehyung coos. "Just one more, you can do that. I know you can."
"Hurts," Jimin says, tone pouty, and Taehyung isn't surprised to see that Jimin is overwhelmed, oversensitive. "It's sore now, ah."
Taehyung rubs above Jimin's rim, the skin below where his balls are still drawn up tight, and Jimin keens. "C'mon, angel. You wanted to take my eggs, I need you to lay them for me, okay?"
Jimin blinks down at Taehyung and then nods, shuddering when he grabs at his own thighs, pulling them up to his chest.
It's so hot, fuck. Jimin puts himself on display and then huffs out little breaths for the final pushes, the last egg stretching him wider than the others.
Maybe the size of this egg burns inside Jimin's used little hole, from the sound of Jimin's whimpers, and Taehyung coos again, kisses the inside of Jimin's calf. "Just like that, almost there. Doing so well for me."
The egg stretches him and stretches him until finally it's squeezed out with a weak cry from Jimin, joining the others on the towel. Jimin's hole is left gaping and red and his thighs shake, whole body trembling as the tentacles let go of him so he can close his legs.
Taehyung ignores the sad pile of not-eggs and moves up Jimin's body to kiss him, his forehead and cheeks and lips.
"You did so well," Taehyung tells him fiercely. "My beautiful mate, you did perfectly for me."
Jimin looks dazed, sleepy, worn out. His eyelashes are wet from his tears. "Yeah?"
"Yes," Taehyung promises, kissing the tip of Jimin's nose. "So perfect. My eggs are only for you from now on, Jimin-ah."