Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/885433.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M
  Fandom:
      Shingeki_no_Kyojin_|_Attack_on_Titan
  Relationship:
      Armin_Arlert/Eren_Jaeger, Implied_Reiner/Bertholdt, Eren_Jaeger/Armin
      Arlert
  Character:
      Armin_Arlert, Eren_Jaeger
  Additional Tags:
      Frottage, Mutual_Masturbation
  Stats:
      Published: 2013-07-16 Words: 3902
****** Doing What They're Doing ******
by Raevell
Summary
     Armin keeps getting woken up by sounds on the bunk below, leaving him
     to lie awake thinking of the boy who sleeps in the bed next to his.
Pairings: Eren/Armin, implied Reiner/Bertholdt
Warnings: NSFW, mutual masturbation and frottage.
One day I will write smut that doesn’t have a long build up, but today is not
that day.
 
 
                           Doing_What_They're_Doing
                                        
                                        
‘Not again…didn’t they just do this last night?’
Armin held back the groan of distress in his throat. It was late, a little past
midnight if he had to guess. The barracks were completely shadowed in darkness
except for the bit of moonlight that seeped in through a few of the windows.
Armin had always been a light sleeper. Even now, 3 years into training with
graduation right around the corner, he hadn’t yet adjusted. He was as easy to
wake as ever and it made sleeping in a room full of other men incredibly
difficult.
The door opening as someone snuck out, or a particularly loud snore, or someone
talking in their sleep; all of these things could wake him from his dreams.
Usually, he’d roll over and doze off again within minutes and it wasn’t that
big of a deal.
But this…he couldn’t roll over and ignore this.
He and Eren slept on the top bunk, a small gap between them the only thing
dividing the space, with Reiner and Bertholdt below them. There was no thought
given to it in the beginning. For a long time the arrangement had never been
something to think twice about.
Every now and then, the breathing below would start to pick up. There’d be a
small grunt or a mutter, the sound of rustling fabric. Again, this was no big
deal. It was easy enough to conclude that one of the boys on the bunk beneath
them was masturbating. Armin hadn’t really cared about that, there was a sort
of unspoken rule that this was acceptable. They were all teenagers and there
was no privacy to be found anywhere on base. There really wasn’t much of a
choice. Masturbation was a healthy form of stress relief and their training
pretty much ensured that everyone was stressed on a regular basis.
It was annoying how such subtle sounds could wake him. But again, not a big
deal, because usually he’d be tired enough to fall right back to sleep once it
ended. It’d last for a couple of minutes and then things would be quiet again.
It was easy enough to disregard.
But then something changed.
One night, as he and Eren lie in bed sleeping, the normal sounds had started to
pick up. The breathing, the sound of skin being stroked… Armin grumbled and
didn’t even bother to open his eyes as he awoke. He had simply rolled over with
a soft sigh. Nothing out of the ordinary, he thought, so he tried to focus on
blocking it out, figuring it would be over soon enough.
But then he noticed that the breathing wasn’t just coming from one person.
There were two very distinct voices, overlapping breaths. Occasionally, the
breathing would become muffled and there would be a soft, wet, ’smack.’ That
was the only way Armin could think to describe it. The sound of a kiss, that’s
what he had concluded it had to be after trying to convince himself otherwise
many times.
Armin had become frozen, curled up into a ball on his mattress as he listened
to the two below, and his mind became fully alert. A soft moan, a mumbling
voice, saying a name. Reiner, he heard  it that time. A little more, faster.
Armin couldn’t remember the last time he felt so hot when it didn’t involve
running laps out in the summer heat. His core temperature must have increased
by several degrees, he exaggerated.
All he could think of was Eren while all of this happened.
Eventually the noise all stopped. But Armin hadn’t gotten any sleep that night
regardless of how quiet the room had become.
The next day he couldn’t bring himself to talk to Eren about it, ask him if he
heard it too. Every time he considered it, Mikasa would come wandering over
suddenly or he’d open his mouth only to realize that he couldn’t find his
voice. Eren hadn’t brought it up either, so Armin assumed he must have slept
through it or had decided it was just better it not be discussed.
It wasn’t a big deal anyway, he told himself, tried to tell himself. A few days
passed without incident. But then one night it started up again. That time, as
soon as he had been awoken, Armin had peeked through the gap between his bed
and Eren’s, trying to get a look at just what was going on below. One bed was
empty, no surprise there, and he spotted movement on the next mattress over,
the one closest to the wall. But the two men were trying to be discreet
apparently, the covers thrown over the both of them, blocking what was actually
going on from any prying eyes.
Somehow, not knowing for sure just what was going on made it even more
enticing, because Armin’s imagination could fill in all the possibilities as he
replaced their roles with him and the brunette boy next to him.
Armin had eventually settled back down onto his mattress and chewed on the
inside of his cheek. Just listening to them had been enough to cause him to
become fully aroused. It wasn’t so much because of the sounds, it was more due
to what imagery began to pop into his head because of it; of doing the things
they were doing, whatever they were, but with Eren.
Armin’s eyes had settled on the back of Eren’s head. His friend was turned away
from him. He had to be asleep, he must have been to lie there so still with
what was happening.
Armin lowered a trembling hand, running it down over his own stomach before
reaching the edge of his pants. It felt wrong to do this while thinking of him,
lying next to him, but the desire was too strong to ignore. His hand started to
slip beneath the waistband of his pants.
But then Eren’s voice grabbed him, causing Armin to go rigid.
“…Armin…it’s not just me that’s hearing that, right?” his tone was soft, and
hushed, but it caused the exact same feelings of anxiety as though he were
yelling at him.
His hand came back up and grasped the edge of his pillow immediately.
“…n-no, I hear it too,” he finally answered after deciding against ignoring
Eren and pretending to be asleep. He knew him too well, Eren would have never
fallen for it.
“Wow,” Eren muttered, his back still to him. “They really think we can’t hear
them?”
“Who knows,” Armin shut his eyes tightly. There was no way he could do anything
to relieve the tension below his waist now. Just like last time, he wouldn’t be
getting any sleep.
That was all that had been discussed between them that night about the
situation and the next day neither of them brought it up. Armin was left groggy
and irritable due to the lack of sleep, earning him twice the amount of yelling
from Keith about how he was only good for titan bait.
Then Armin realized it, Eren was getting yelled at for once as well. “What the
hell was that, Jaeger, you wanna end up as titan food with blondie?!”
It was like he had a lot on his mind. Armin wondered if it had anything to do
with what had happened, if Eren was still thinking of it.
When Armin caught Eren staring at Reiner and Bertholdt during a break and his
face turned bright red, he felt that was proof enough that it was indeed on his
mind.
That night, he and Eren had climbed into bed as usual and again nothing about
what had happened was talked about. The lights went out, they curled up under
their covers, and tried to get some sleep.
But then it happened again. He had been sleeping relatively peacefully, but
Armin’s eyes opened immediately as the same sounds as last night began, the
same images of Eren popped into his head, his heart raced and his temperature
rose.
He hadn’t gotten any sleep last night due to the sounds they had made
influencing his thoughts with images of the boy sleeping next to him. He tried
once again to think of something else, think about anything other than Eren,
but each time he heard a soft moan or that sound of a kiss, he would go right
back to the ideas he was trying to avoid.
 He didn’t think he could do it, go two nights in a row without sleep.
His mind was in such a state of disarray as he was forced to listen to them
again that night, he didn’t even notice it at first, a voice saying his name.
“Armin…” it was only due to the fact that he felt a light puff of warm air hit
against the side of his neck that he realized Eren had moved from his mattress
and over onto his, lying down right next to him.
It was the last thing he needed. Armin was as stirred up as last time as he
listened to the two men underneath him and thought of the boy now lying behind
him. Eren’s warmth spreading out over his back did nothing to help calm him.
His breath hitched and he kept his lips drawn together, not wanting Eren to
hear him panting. It left him feeling like he wasn’t getting enough air.
“W-what is it?” he questioned, eyes shut tightly.
“…do you think it’s weird?”
“Do I think what’s weird?”
“What…they’re doing,” Armin knew right away whom he was talking about.
He wanted to respond in the least awkward way possible, but he was convinced
his brain lacked the necessary amount of blood right then to function fully. He
felt he couldn’t really ponder the question Eren had posed, so he just started
talking, mostly to try taking his mind off of everything that was going on
around him.
“N-no, not really. I mean, it feels good doing stuff like that on your own, so
of course it feels even better doing it with someone else. R-Reiner and
Bertholdt trust each other, it makes sense they’d feel comfortable doing things
like that with one another.”
Eren was quiet and the silence seemed to linger, making Armin’s muscles feel
taut. He had just been sharing his initial surface thoughts, perhaps he should
have considered at least attempting to dig deeper and come up with a better
answer to the question.
Finally, his friend spoke again. “…even though they’re…guys.”
It didn’t ring as a question to Armin’s ears, perhaps more of a remark of
acceptance.
He tried to put more thought into what he said next. “In a few months we’re
going to be out there, likely fighting titans, at least those of us who aren’t
going to be accepted into the Military Police. So much time has passed since
the fall of Wall Maria and there hasn’t been any success when it comes to
retaking it. Everything just feels…” he clenched his bed sheets. “…hopeless. It
feels hopeless. There’s so little happiness out there, if you can find even a
bit of it by being with someone else, then who cares if they’re a boy or a
girl.”
The conversation had probably taken a more serious turn than Eren had intended.
Armin wasn’t even sure where the words had come from. Not from his brain, he
told himself.
Armin felt Eren’s hand on his shoulder. He urged him onto his back, pushing him
down against the bed. Armin was too stunned to consider resisting the motion.
Eren kept that hand on his shoulder while the other rested next to the side of
Armin’s head. The blonde boy found himself in a momentary stupor as he stared
up at his friend and even in the dim light he could see the intensity in his
green eyes.
“Can…” Eren swallowed and glanced off to the side. Just as Armin was going to
prompt him to continue, Eren looked back at him and took a deep breath. “Can we
do it too?”
He must have missed some crucial part of the exchange. From what he had
gathered so far, he alleged that Eren wanted to do what Reiner and Bertholdt
were doing. With him. He had to have missed something.
“Do…do what, now?”
Eren let out an irritated huff. Swinging his leg over Armin’s hips, he lowered
his body down onto his. Armin squeaked like a chew toy that had been squeezed
as he felt the firmness between Eren’s legs press against his stomach, when he
felt the warmth of Eren’s body up against him as well.
“You said…that two people who trust each other can do this type of thing,
right? Make…each other feel good instead of doing it by themselves?”
Armin gnawed on his bottom lip. The pressure of Eren bearing down on him made
his whole body tingle. He was losing what remained of his coherent thought
process. His hands quivered as he lifted them up to Eren’s face. He felt warm,
his cheeks possibly even hotter than his own. Could this really be happening?
It seemed too good to be true.
“You…you really want to?” he held his face between his hands firmly, not
wanting Eren to look away from him as he answered.
Armin didn’t consider himself to be attractive. He thought Eren had always been
far out of his league. Even if they were close friends, it was difficult to
accept he would want anything more from him when he was certain there were
plenty of others who would be willing.
Eren didn’t waver in his response. “I really want to. With you, Armin,” Eren
leaned down, pressing his forehead against his. “You’re…the only one I want
to…with,” it had been a while since he saw his friend look so nervous. “Is it
okay?”
Armin inhaled slowly, the sound of his racing heart was loud in his ears. He
wanted to weigh the pros and cons of this more thoroughly but he couldn’t get a
response from his brain. Of course it was okay, Eren meant everything to him,
if he could truly provide him with some comfort in this world he wouldn’t
hesitate.
No, that wasn’t entirely right though. He wasn’t being selfless,
he wanted Eren. This was just as much about himself as it was about him.
“I-it’s okay. It’s more than okay,” he finally managed to respond, voice
shaking. He moved his hands along his face and tangled his fingers up in the
brunette’s hair. “I want to. No have no idea how badly I want to.”
Eren’s shoulders seemed to relax. Had he really been bracing himself for
rejection? Armin reached for him, wrapping his arms around Eren’s neck and
pulling him down even further against him. Eren sighed against his neck and the
sensation made Armin shiver. Eren’s arms slid under his back, hugging him
tightly in return. They stayed like that for a moment, simply enjoying each
other’s warmth.
Eren was the one to move first. Armin’s arms slid off of him, letting him go,
and Eren sat up, straddling his legs. They were both completely inexperienced,
but at least Eren had the courage to try regardless. He reached for the edge of
Armin’s pants and started to tug them down. Armin was glad that it was still so
dark in the room, feeling the embarrassment would be too much to take
otherwise.
“You’ll have to…uh, guide me, you know? I don’t…know what you like,” Eren
muttered. It made Armin feel better knowing Eren was lacking in confidence as
well, they were both on the same page.
“R-right, you too,” Armin nodded.
Copying what Eren had done, he reached forward to pull the front of his pants
down, just enough to expose him. Sucking in another deep breath of air, he
brushed his fingers over the tip, perhaps as a form of testing to make sure it
was really all right.
Eren moved a bit closer to the contact. In response, his fingers rubbed over
Armin with a gentle motion. Armin bit down on his bottom lip quickly to stifle
his moan. The intensity of the sensation was surprising for such a mild touch.
Armin enclosed his fingers around Eren’s shaft. The more his mind started to
cloud with fervor, the deeper any embarrassment sunk below the surface of his
emotions.
Taking the initiative again, Eren’s hand closed around Armin as well. Unlike
Armin there was no reluctance, he began to move his hand, stroking down to the
base and then back up. Armin’s bit into his bottom lip again, struggling to
keep quiet; he was starting to understand why Reiner and Bertholdt made as much
noise as they did. It wasn’t so difficult when it was his touch alone but doing
this with Eren… The feeling was just too powerful. Eren didn’t let up, rubbing
him up and down, his strokes slow but thorough, touching every inch of him.
“How’s that?” Eren asked softly.
“G-good,” it was the only way Armin could describe it at that point, thoughts
too jumbled to come up with anything more expressive.
Wanting to reciprocate, he began a slow pace with his own hand. Eren sighed
quietly and the sound made Armin’s eyes light up. Something about it caused his
heart to leap. His grip became more firm as he thought of how exactly he would
touch himself. It seemed as good of a base as any to start with.
“Ah—“ he saw Eren clench his teeth and he realized he must have been fighting
to stay quiet as well.
As though the pleasure he was receiving encouraged him, the hand he had wrapped
around Armin began to move a bit faster. Armin gasped, unable to keep his lips
together when the feeling hit him, the jolt traveling through his body and
making his toes curl. He wasn’t going to last long at this rate.
“E-Eren…” he couldn’t keep his voice steady as he spoke. There was something he
wanted even more than this and he thought he better ask for it before he
returned to his senses. “Kiss me.”
He saw the brief widening of Eren’s eyes. “You…you really want me to?”
Armin nodded. “P-please.”
Placing his other hand back down on the bed, he kept most of his weight off of
Armin as he leaned down. As he looked back into Eren’s eyes, Armin wondered
what he was thinking, wished he knew.
Eren closed the distance slowly. Noses bumped before lips met. Eren pulled back
and mumbled something about it being dark. Before Armin could take another
breath, he tried again. Eren tilted his head to one side this time, allowing
their lips to touch.
It was gentle, tender, causing a pleasant, warm, feeling to flood Armin’s
senses. Eren didn’t seem satisfied though, grumbling again as they parted. He
leaned down once more and this kiss was firm, more certain, sealing their lips
together. The heat intensified and Armin moaned in response. It surprised him
how dizzy he felt from their lips connecting.
As Eren’s body pressed into his, their hands collided, still wrapped around
each other’s arousals. Armin wasn’t sure what he liked better, Eren’s touch or
the feel of his lips.
He let go of the other boy and moved his arms around his shoulders again,
realizing he wanted more kisses, more of that heat and breathlessness. Eren
followed along with his desires, letting go and circling his arms around
Armin’s waist. Their hips met and a gasp came from both of them when their
erections brushed together.
They caught one another’s gaze and Armin noticed the spark in Eren’s eyes. Eren
placed his hands back on the bed to brace himself. When he leaned down into
another kiss, his hips bucked forward. Armin cried out and was grateful for the
other boy’s mouth dampening the sound.
Armin’s hold on him became tighter and he couldn’t stop trembling as Eren
continued to rock back and forth, rubbing them together. There was something
about the heat of their skin and the way Eren moved that sent Armin’s mind
spinning. He wanted more of his warmth, he wanted more of him. He felt as
though he couldn’t get enough.
Lifting his own hips, Armin attempted to mimic Eren’s movements, building even
more friction between them. They were no longer being very quiet but Armin
couldn’t have cared less right then if they woke the whole room. Eren moaned,
the bed sheets bunching up beneath his clenched hands. Armin thought to himself
how that sound was more alluring than anything he had heard before.
The pace was quick to pick up. Armin grabbed Eren by his hips, steadying him as
thrusts became more frantic, making sure each motion stroked them together.
“Don’t stop…Eren…!” Armin managed to beg between gasps and kisses. The air in
the room felt thin, his muscles ached from his efforts, but the pleasure
overshadowed any discomfort. He felt so close to the edge, he just needed one
final push.
When Eren’s hand wrapped around them both, squeezing them together gently as he
continued to move his hips, Armin found himself completely overwhelmed. Being
encased by his hand again, the tight grip, the warmth… The feeling of him
grinding against him as his lips captured his over and over, it was too much.
It felt too good. He arched up, crying Eren’s name against his mouth as he
spilled into his hand.
It wasn’t long before Eren followed, gasping Armin’s name in return as he
shuddered and tensed.
Armin sighed contently and leaned up to touch their lips together in a faint
kiss as they both tried to catch their breaths. He felt dazed, blissful. He
probably had the stupidest smile on his face, he thought, but right then he
didn’t care.
Eren moved off of him, laying down at his side, still a bit winded. Armin
rolled over to face him and curled up against him.
Eren smiled back at him and pulled the blonde boy closer, into his arms. “It
definitely feels better, doing it with someone else.”
Armin tried to keep his laugh quiet despite the fact he was certain they must
have awoken a least a few people already. “It does,” he agreed and the blush
returned to his face. “But…I think it only felt as good as it did for me
because it was with you.”
“Yeah,” when Eren agreed without pause, Armin’s heart felt like it was
fluttering. “Because it was with you, the person I trust the most.”
Armin couldn’t remember a recent time when he felt so light. This world was
bleak, full of so few good things to hold onto, but in that moment he was
reminded of the hope he felt when he was with the person most important to him.
Armin found himself wondering, as he often did, about what his friend was
thinking, but somehow he felt that he already knew; right then, they were
thinking the same thing.
Sleep, for once, came easily this time.
 
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