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Lessons and First Times

Summary:

Hiiro walks in on Rinne and Niki having sex, which quickly turns into a lesson for the inexperienced teen.

Notes:

This is a far cry from my other Enstars stories and has absolutely no relation to any of them, but the brain-prompt just wouldn’t leave me alone. Also my first time posting explicit sex, so advance apologies if it’s bad. Uh, incest and a threesome, if you didn’t read the tags.

…What am I doing with my life?

(See the end of the work for more notes.)

Work Text:

“Nii-san?”

Niki yelped at the sound of his roommate’s voice. Not just his roommate, though, but the little brother of the one currently fucking him on his bed.

Rinne slowed his pace, but didn’t completely stop. He smirked up at his brother. “Otōto. You’re back sooner than we expected.” This was accompanied by a grind of his hips, his cock hitting Niki’s prostate in such a way that drew an unwilling moan from the silver-haired teen.

“Rinne-kun, st-ah! Oh fuck!” Niki tried to tell the older Amagi to stop, but every word he tried to say was stopped by a moan or expletive as Rinne moved in various ways to send pleasure through his body.

“What… are you doing?” Hiiro asked, walking in slowly from where he’d been standing near the door, eyes watching the scene before him.

“What does it look like? ‘M giving my dear Niki-kyun a good fucking.”

Hiiro was silent for a moment. “I thought sex happened between a man and woman?”

Rinne paused in his movements, bringing a whine out of the panting Niki. “I know you’re naive, Otōto, but you’re not stupid. Come here.”

Hiiro, as always, was quick to obey his brother. Rinne patted a spot on the mattress next to them, gesturing for Hiiro to sit. The older Amagi massaged circles in the skin of Niki’s hips. “Ya okay with us givin’ ma brother a little lesson, Niki-kyun?”

Niki threw an arm over his eyes. “I don’t even care anymore, Rinne-kun. Just fuck me, please.”

Rinne chuckled as he began to slowly thrust again. “Fuckin’ a guy in the ass can provide just as much pleasure as for a woman in her cunt. Though it’s tighter, so ya always gotta prep with yer fingers first. Loosen them up a bit before ya use yer cock. An’ always use lube. Ya wanna make it as smooth as possible to enter.” Rinne emphasized his words by giving a deep thrust that made Niki moan. “Ya can also use yer hand or mouth to pleasure their own cock. I want ya to practice with your mouth on Niki, ‘kay Otōto?”

Hiiro hesitated for a moment before crawling up on the bed and hovering above the silver-haired teen’s erect member. He looked at his brother, who gave him a nod, then carefully licked the head. Niki moaned again, hands gripping the covers tight.

“Use yer tongue, Hiiro. Take the head in yer mouth, but be careful ta keep yer teeth back. And take it slow. If ya go too fast, you’ll end up gagging.”

Hiiro took a breath before following his brother’s directions. It was a weird feeling, but he thought he must be doing something right based on the sounds Niki was making. Between being fucked and having his cock sucked off, even if by an amateur, it wasn’t long before the chef was coming.

Hiiro pulled away in surprise, his face getting splattered with cum. His expression scrunched slightly at the taste of what ended up in his mouth.

“Fuck!” Rinne moaned, thrusting a few more times before finishing inside Niki’s ass. He took a look at his brother and cackled. “Yer suppose ta swallow it, Otōto. Though I guess Niki was bein’ a little mean by not warning ya.”

“You try speaking coherently while being double stimulated.” Niki protested weakly, trying to regain his breath after the intense orgasm.

“It tastes weird.”

Rinne laughed again. He used his thumb to gather up the cum still on his brother’s face, pushing it towards his brother’s mouth that opened obediently despite his distaste. “Yeah, it does. But ya get used to it. Always make sure ya swallow if ya suck a guy off though, Hiiro. It’s less of a mess.” Hiiro nodded. “M’kay, next lesson. Take off yer clothes.”

This time Hiiro didn’t hesitate to obey, though there was an inexperienced kind of awkwardness to his movements. Rinne pulled him onto his lap and ran a hand around his ass, fingers barely brushing against his hole. “Niki, can ya grab the lube?”

Having regained some of his energy, Niki sat up and grabbed the bottle on the bedside table. “Mhm, you look delicious, Otōto-kun. Can I do the honors, Rinne-kun?”

Rinne cackled once more. “Ya wanna fuck my little brother, Niki? M’kay, then.” He gripped Hiiro’s thighs and pulled them apart, leaving him completely exposed to the silver-haired man.

A blush adorned Hiiro’s face and he gasped when Niki touched him. “Nii-san?”

“Trust me, Hiiro. It’s gonna feel weird and a little uncomfortable at first, but I promise you’ll feel good.”

Hiiro bit his bottom lip but nodded, leaning back against his brother for some kind of stability. Niki pressed a lubed finger against the younger’s exposed hole and slowly slipped it inside one knuckle at a time. Hiiro gasped again and tensed. “Relax.” Rinne stated, massaging against Hiiro’s thighs and layering his neck and shoulders with gentle kisses.

Hiiro shuddered at the feeling of Niki’s finger slowly thrusting within him. He forced himself to relax, focusing on his brother’s touch. Niki cursed under his breath. “Fuck, you’re so tight… I’m gonna put another finger in now, okay?” A mix of a whine and a moan escaped Hiiro’s throat with the addition. It felt weird, but not really in a bad way. Then Niki crooked his fingers up at the end of a thrust and Hiiro saw stars. “Found it!” The chef said, a satisfied smirk on his face upon hearing the loud moan escape the younger’s lips.

Hiiro tried to raise his hands up to cover his mouth, to smother the sounds, but his brother grabbed them and kept them pinned to his sides. “None of that, Hiiro. We want to hear everything.”

Between Niki’s attention to his prostrate and the scissoring motion he was using to stretch him out, Hiiro quickly became a mess. Sounds of pleasure spilled from his mouth and it was only Rinne’s hold on him that kept him upright. Niki added a third finger without warning and it was enough to bring Hiiro over the edge, breath catching on his loudest moan yet as he came, release spilling over onto his stomach and dripping down onto Niki’s hand, still three fingers deep in Hiiro’s ass.

Rinne’s laugh reverberated within the room. “Damn Otōto, I didn’t even touch ya.”

“He’s very sensitive, Rinne-kun.” Niki said with glee as he continued to pump his fingers in and out of the younger redhead’s hole.

“Not really a surprise there, Niki. I doubt he’s even touched himself before. But I think he’s about ready for ya now.”

The short conversation went over Hiiro’s head, still foggy with bliss. He didn’t register anything until Rinne was shifting him to lay on his back, arms secured above his head. He whimpered when Niki pulled his fingers out. It was strange how… empty he felt without them. It was but a fleeting thought, vanishing with a gasp as he felt something distinctly not fingers poke at his entrance.

Hiiro’s breath hitched and he felt a whine escape his throat as the head of Niki’s cock breached his ass. A sob bubbled out of his lips and it was only Rinne’s hold on him that kept him from trying to move away. He managed to open his eyes, looking up at his brother’s face. “Nii-san…” he gasped, shaking as more of Niki’s length entered him. “Nii-san, it hurts…”

Still using one hand to keep his arms secured, Rinne brought his free hand up to card through Hiiro’s hair. “The first time always hurts a bit. It’ll feel better soon, I promise.”

Rinne’s words could only provide so much comfort. Even though he trusted his beloved brother indisputably, he couldn’t stop his cries as Niki’s length stretched him more than he thought possible. Hiiro felt tremors run through his body, accompanying the spikes of pain as Niki went deeper inch by inch. The chef’s hands were massaging patterns on his thighs in an attempt to help him relax. It felt like an eternity before he bottomed out, stilling to allow Hiiro to adjust to the feeling.

“Fuck…” Niki huffed. “You feel amazing, Ototo-kun. Tell me when you’re ready, m’kay?”

Rinne brushed his brother’s hair away from his face, placing a brief kiss to his forehead. “Breathe, Hiiro. Relax and let your body get used to the feeling. Niki’s not gonna move until ya say it’s okay.”

Hiiro gave a jerky nod, trying to even out his breathing. Now that Niki had stilled, the pain began to dull and he started to feel an oddly satisfying fullness. It was such a strange feeling, much like when Niki’s fingers were in him but a lot more intense. It wasn’t bad… It wasn’t really good either… Just strange. But Hiiro trusted his brother, and if Rinne said it would feel good then surely it would. He took another shaky breath. “You can… you can move, Niki-san.”

Instead of moving though, Niki leaned down and pressed his lips to Hiiro’s own. His lips were soft and the kiss short, barely more than a peck. But it was distracting enough that Hiiro didn’t realize Niki had pulled back until he thrust inward again. Hiiro’s mouth opened with a silent gasp. The pain he’d felt before was just a background twinge. Niki was going slow, but each subsequent thrust built up that strange feeling coursing through his body.

It was on the next push that Niki hit that same spot his fingers had found before and Hiiro was once again seeing stars as he moaned. The chef made a point of driving his cock just right as to keep hitting his prostrate, sending the redhead wave after wave of pleasure, easily drowning out any discomfort he’d been feeling before. A mixture of cries, gasps, moans, and sobs escaped Hiiro’s mouth, all deriving from pleasure instead of pain as Niki’s thrusts picked up speed, slamming into the previously virgin hole with fervor.

Rinne laughed. “You’re bein’ so loud, Otōto. It feels good, yeah? Just like I promised.”

Hiiro could do little more than nod his agreement, mind too overwhelmed to form a coherent thought.

“Ah, you feel so good around me, Otōto-kun.” Niki moaned in tandem with his thrusts. “So pretty, laying there and taking it. You want me to cum in you? Come on now, I need an answer. Let me hear your pretty voice.”

Hiiro let out another gasp, trying to get his mouth to form words. It was much more difficult than he expected, his mind simply wanting to continue to let the pleasure overwhelm him. “What… whatever… whatever Niki-s-san… w-wants- Ah!”

Niki’s thrusts came faster upon his answer and that was all it took for the redhead to come to his own climax. Hiiro tightened reflexively as his orgasm washed over him and then there was the feeling of warmth as Niki came to his own peak, burying himself deep in the younger and filling him up.

There was a moment of stillness in the room, with only gasps for breath from both Hiiro and Niki as they came down from their highs. A whine escaped Hiiro as Niki pulled out. The chef watched in satisfaction as his cum began to leak out of the teen’s fucked out hole. Hiiro didn’t even have the energy to move, evidenced by the fact that his arms were still bent above his head despite his brother releasing them a few moments before.

Rinne had a hand around his own cock, jerking off to the scene before him. Niki smirked at the older redhead. “Mmm, let me help you out with that, Rinne-kun.” Despite his own exhaustion catching up to him, Niki didn’t hesitate to wrap his mouth around Rinne’s hard member.

Hiiro watched in a daze, his mind subconsciously noticing how at ease Niki was with a cock in his mouth and how much deeper he was able to take it. It didn’t take much at all for Rinne to finish and Hiiro watched as Niki expertly swallowed every drop of his brother’s cum before pulling away with a smirk.

“You’re so fuckin’ sexy, Niki-kyun.” Rinne said, leaning down to kiss the silver-haired man. He then turned his attention to his brother. “That was pretty intense. How ya feelin’, Hiiro?” Hiiro sluggishly opened his mouth to respond, but all that came out was a tired cry. Rinne chuckled. “Yeah, that’s to be expected. Come on, we need to get ya cleaned up, then you can take a nap.”

Hiiro wrapped his arms loosely around his brother’s neck when Rinne lifted him up bridal style, carrying him to the bathroom. He doesn’t remember being cleaned or dressed. The next thing he’s aware of is being laid in his own bed. He catches his brother’s sleeve as Rinne turned to walk away. “Thank you, Nii-san.” He said, a yawn catching the end of his words. “It did feel… really good… Can we do it again sometime?”

Rinne leaned down and captured his brother’s lips in a possessive kiss. When he pulled back, his signature smirk was on his lips. “‘Course we can. Plenty more I can teach ya. Besides, I’ve yet to fuck ya myself. Yer in for treat.”

Hiiro smiled even as his eyes began to drift closed. “Hmm, good. I love Nii-san… I wanna feel him… inside, too.”

Rinne could only watch as his brother fell asleep. He ran a hand through his hair and huffed out a short laugh. “Fuck, Otōto. Yer gonna be the death of me.”

Notes:

Hope you enjoyed? I mean, if you’re into this kind of thing. I’m probably going to hell, but I can just see Rinne and Hiiro being the kind of brothers that could be incestuous. I won’t lie and say I haven’t read any Rinne/Hiiro stories and liked them. Again, this has no relevance to my poly!ALKALOID series or any of my other Enstars works.

… Seriously, what am I doing here?

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