Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/923560.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      Multi
  Fandom:
      Shingeki_no_Kyojin_|_Attack_on_Titan
  Relationship:
      Mikasa_Ackerman/Armin_Arlert/Eren_Yeager
  Character:
      Mikasa_Ackerman, Eren_Yeager, Armin_Arlert
  Stats:
      Published: 2013-08-12 Words: 3232
****** How to Treat a Lonely Heart ******
by 13ofstars
Summary
     There's not much time to spend together when they're training and it
     doesn't strain their relationship but it definitely puts stress on
     them as teenagers in love.
Notes
     there is not nearly enough love for these three, especially on
     tumblr. especially for erenmikasa, what's up with that?
See the end of the work for more notes
All of the trainees were given one day a week free from training, probably so
they all stay sane. Most of the kids went into the town nearby to relax and
some stayed back in the camp to train on their own. Of course, if someone came
back to camp drunk, there was hell to pay for all the trainees so everyone
usually behaved. Even the cabins, which were not separated by gender, were
expected to be full of well-behaved kids. Everyone knew sex wasn't prohibited,
but, anyone who did have sex with someone else was likely to be overheard or
interrupted. Not only that, but they would most likely stay in late sleeping
and that was never a good thing for anyone. Just one fuck up by one person
spells trouble for everyone. They learned this quickly after their first month.
Of course, this made things harder for Mikasa and her small family. She was
left to sharing a bed next to Sasha, with Krista and Ymir above them. Not only
was she in different classes as Armin and Eren, but her bed was on the other
side of the cabin from them. They rarely came to talk and she rarely went to
see them too. The times they really spent together were when they ate, the few
classes they shared, and their free day.
Those were Mikasa's favorite days. Normally, they wandered around camp, talking
and sharing stories of the week. Sometimes, they sparred a bit. Rarely, they
went into town. It was one of the last things they wanted to do since the
chances of running into someone was high there and getting into fights wasn't
against the rules. Mikasa and Armin both had silently agreed that Jean and Eren
should be kept apart on their off days. They didn't want to share him when they
finally all had the chance to hang out anyway.
It's a couple months before they get to graduate and nearly everyone is out in
the town, celebrating how close they are. Personally, Eren thinks to himself,
no one should be celebrating just yet, there's so much left to do. But, he
never mentions this to anyone, since none of them would be there if they
weren't ready to be fighting Titans. Mikasa nudges his arm once to bring him
back to the conversation.
"So, where should we go today?" Armin's asking.
"What is there to do?" Eren mutters. The sun's hot and he's been in a sour mood
all morning. To be honest, none of them are feeling all that great. Maybe it's
just one of those days, or maybe it's just all the exhaustion from classes and
training getting to them. Mikasa stops them from their aimless wandering, a
hand on their arms.
"We could just," she starts, turning a bit to look back towards where they came
from. "Take a nap. Rest. It's been a long week." Armin glances nervously at
her, taking in the lines on her face and the shadows under her eyes. The week
was hard for everyone, but Mikasa's been stressed out for a while, he noted. It
goes without saying that he was really worried about it. He was worried about
all of them, yes, but he never expected Mikasa to look this bad.
"That sounds nice," Armin offers, looking at Eren. Eren's quiet for a moment
and then shrugs and they all head back to the cabin. Eren immediately heads
towards the bunk he and Armin share. Mikasa's up the ladder last, with Armin
offering a hand to her as he gets to the top in case she needed it. "This is my
bed and Eren sleeps over there." He points over to Eren's bed and Eren's
already flopped down on his bed, covers a mess under his legs. Armin nudges
Mikasa over to Eren's bed and grabs his pillow and cover as well to bring with
him. They all squeeze into the bed, Armin trying his best not to fall into the
small slip of space between the beds. It's like when they were younger, Eren in
the middle with Mikasa on his right side and Armin on his left. No one says
anything for a long time. Armin's the first to say something and he hopes he's
not overstepping the thin line between him and Mikasa.
"Hey, Mikasa," he starts. He waits until she answers.
An answer doesn't come. He lifts his head to look over at Mikasa and he
realizes she fell asleep. Probably as soon as she lied down, considering she
hadn't even pulled the covers up. Eren's awake though and he's looking at
Mikasa too.
"Hey, Eren," Armin says. Eren's eyes move to meet his and he shifts so he's
lying on his side to face Armin.
"Yeah?"
"Does Mikasa look... bad to you?" he asks. Eren raises an eyebrow at that. "No!
I mean, like, tired, stressed, worried...?" Eren's face turns thoughtful and he
sits up to look at Mikasa now.
"You're right. Normally, just talking would wake her up," he says.
"Do you think, maybe, she missed you?" Armin asks. His eyes meet Eren's. Their
relationship was never discussed. Truth be told, Armin wasn't really sure what
they even were.
"You kno-" Eren starts but Armin stops him with a huff and an incredulous look.
"We all know she loves you more. Don't even try to lie to me, Eren," Armin
warns. "Look, I know it's not that she doesn't like me, but we all know she
likes you more. It's not a bad thing." Eren's silent for a while before he
sighs, rubs the back of his head, and then replies.
"Yeah, I think so. Sasha told me she's been acting more differently. When
they're going to bed and stuff," he murmurs. "I didn't really notice." Armin
smiles at him. He knew that already. Eren doesn't notice much, to be honest. Of
course, he's not stupid! He just worries more about other things.
"We should... spend more time with her?" he suggests. But that honestly sounds
like a stupid idea and he regrets saying it the moment the words fall. Eren
looks at him dumbfounded.
"We spend all the time we possibly can with her," he says. Armin's face turns
slightly pink as his anger and embarrassment rises.
"I know, I just, I don't know why I said that," he grumbled.
"Could you stop talking about me and just sleep?" a voice mutters on their
other side. They both blush as they look at her and she's staring at them.
"Sorry," Eren apologizes as he lays back down, scrambling down so his head is
actually on his pillow and not the block of wood above his bed. Armin stays
where he is, propped up on his elbow.
"So, why have you been feeling down, Mikasa?" he asks, heart in his throat. It
takes a lot of bravery to ask something like this to a person like Mikasa. She
stares him down for a moment and Armin can see Eren's look out of the corner of
his eye and he's pretty sure he has the same exact look of horror. He grits his
teeth though and refuses to back down. Mikasa's eyes move back to staring at
the bunk above them.
"No particular reason," she says.
"That's bullshit," Armin spits and both Eren and Mikasa look at him sharply. He
purses his lips. Mikasa goes back to staring at the bunk, sighing.
"You're so far away," she murmurs. And Armin knows she's talking about Eren and
how they aren't as close as they used to be.
"We can't help that," Eren grumbles. Armin's heart twists.
"We're sorry," he offers. Mikasa turns to look at him and smiles softly.
"I know." Armin leans over Eren to plant a kiss on Mikasa's forehead. He's
blushing, he can feel it all the way to his ears, and Mikasa's cheeks light up
just a bit as well. She pulls his face back down to hers to kiss him deeply.
"Hey, hey, not on me please," Eren says nervously. He grabs Armin by the waist,
pulling him over his own body to lay on top of both him and Mikasa. "Nap time
is over." Armin glances at Eren, as he leans close to kiss Mikasa as well.
Armin shifts around to throw both of the covers from underneath all of them and
throw them onto his own bed.
"Uh, do you think someone will come in?" he asks nervously.
"Everyone's in town or outside, no one comes in at this time," Mikasa murmurs
against Eren's lips and it takes Armin a moment to understand what she said.
For a moment, Armin's left awkwardly to watch Eren and Mikasa. Then Eren
abruptly sits up, moving down her body to tug off her pants. Mikasa reaches for
Armin and he takes Eren's old spot, kissing her. His tongue softly traces her
bottom lip before she pulls him in deeper with a soft sigh. Suddenly, she
jerks, pulling away from the kiss to take a deep breath and bite her lip. Armin
looks back to see Eren, face pressed against her groin, her thighs over his
shoulders. Needless to say, the sight and the sound of Mikasa's soft groans did
things to him and it would haunt his dreams. He presses back down to kiss
Mikasa's lips, tongue encouraging her to open up to him and she eagerly does
so. She's aggressive now, pressing back at Armin and he can feel her move under
where he's sitting on her stomach. Her hands tangle in his hair and he groans
appreciatively. She breaks away for a moment to take a breath and then she's
claiming his lips again. He can taste her moans, feel them tickling his lips as
they force themselves out.
"Are you close?" Armin whispers against her lips and she nods, eyes still
closed. He leans down to bite at her jaw and neck, leaving marks everywhere he
can. With her scarf, no one should notice. He can feel her hands tighten in his
hair as her breath hitches and she stiffens to let out a soft moan. He doesn't
really know if she's finally reached an orgasm until she ruffles his hair
softly before leaning up to pull Eren in for a kiss. She pulls Armin around to
hug him to her as she continues to press kisses to Eren's neck. Her hands are
reaching down to Armin's pants, unbuttoning them to reach down and squeeze his
dick. He gasps, hands tightening in Mikasa's shirt. He can hear the wet sounds
of Mikasa and Eren kissing in his ear and he's fairly sure he's going to have
wet dreams of this for months. He rolls his hips up into Mikasa's hand and she
tightens her hand for a moment before pulling her hand back. He groans and
Mikasa's lips are soon on his and he can taste Eren on her tongue, along with
what he assumes to be the taste of her.
"Get up a bit, Armin," Eren whispers in his other ear and Armin shivers before
doing so. It always feels like Mikasa and Eren share the same mind when they
start to move in sync, Eren pulling Armin back to lean against him and Mikasa
pressing forward, her knees between Armin's and her chest pressing against his.
Eren pushes Armin's pants down to his thighs, one hand wrapping around his dick
and the other pressing against his stomach. Armin can feel Mikasa's hands
snaking around and pushing Eren's pants down as well before the wet heat of
Eren's dick is against Armin's backside. Eren bites down hard on Armin's
shoulder, groaning as Mikasa works him over. Armin gasps, hands reaching behind
to tangle in Eren's hair and Mikasa presses forward to pull him into a kiss.
Eren's hands are reaching around to tug on Armin's dick. Armin winces a bit. He
appreciates how eager Eren is, but there is absolutely no need to be handling
his dick so roughly. He does enjoy the pain though, surprisingly, and it keeps
him on the edge of cumming. He openly moans into Mikasa's mouth and he knows
they both know he's getting really into it. Mikasa's hand leaves Eren's dick to
reach around and under Armin to grab his balls and lightly rub them for a
moment and then her hand is going back, palming his ass as she goes back to
jerking Eren off. Eren bites down again, harder on Armin's shoulder and Armin
groans loudly, dick jerking in Mikasa's hand.
"Don't bite so hard, you're going to make me bleed," Armin hisses but they both
know he would be fine with that. By this point, Eren is rolling his hips up
into Mikasa's hand and Armin can feel every movement on his back and he's so
close. Soon enough, Eren cums, moaning loudly against Armin's shoulder. The
feel of Eren's cum splattering on his back has Armin shivering and a soft moan
tumbles from his lips, but he hasn't cum yet, not with Eren roughly touching
him. Mikasa's knocking his hand away quickly and lightly touches Armin's dick,
her hands soft and gentle. Eren's biting softly at his neck now and Mikasa only
has to tug on his dick a couple times before he's spilling onto her stomach.
For a moment, they're all pants and huffs before Mikasa is pulling up Armin's
hand to kiss his palm. And, then, to his surprise, she sucks in two of his
fingers. He presses a kiss to her forehead and nudges her back to fall back
onto the bed. He nervously glances over at Eren.
"I haven’t done this before. I don't really know what to do," he whispers. Eren
just nudges him before leaving his place to sit next to Mikasa so he could lean
over her to kiss. Armin takes that as a "go with it". So he does. He sits
between Mikasa's thighs, pressing kisses to her stomach and pushing her shirt
more and more up until he just unbuttons her shirt. He won't lie, he loves her
breasts. He presses his hands to her ribcage, lips lightly kissing one nipple
before leaving to swirl his tongue around the other and then lightly biting it.
She groans and a hand reaches down to pat his cheek. His hands knead the
muscles of her stomach, the soft fat that pads her hips, her breasts, her
waist, anything he can reach. He sneaks a hand down toward her groin, his
fingers brushing against the coarse hair there. His fingers lightly tap against
her clit and she bucks her hips up with a gasp. He presses back harder now,
moving his fingers in a circle. His lips find a spot right on the underside of
one of her breasts to leave a hickey. One of Mikasa's legs lift to settle on
his shoulder and he eagerly presses a hand against it, pushing it farther up.
He leaves kisses on her stomach in a trail down before he plants a kiss on her
clit, hard. The fingers he had used to rub her clit earlier he touches to the
entrance of her vagina.
"Mikasa?" he asks nervously and she and Eren break their kiss so she can look
at him and groan in reply. "Is this... okay?" He doesn't know how to word this
but he knows she'll get what he’s trying to say. She nods vigorously before
pulling Eren down against her neck. She's panting hard and Armin thinks she's
beautiful. He slowly presses a finger inside her, slowly. He slowly rocks it in
and out of her, pressing kisses to her clit. Soon, another finger joins and he
sucks at her clit. She groans her other leg hooking over his shoulder so both
of her heels press on his back. It doesn't hurt. He curls his fingers upwards,
over and over, until she jerks and presses her hips down against his hand. He
glances up at her and she breaks away from Eren.
"Again, harder, more," the words spill from her lips breathily before she
tangles a hand in her own hair and the other pressing against a breast. He's a
soldier who follows the orders he's given, so he smiles, gently nipping at her
clit and curling his fingers in her over and over as she rocks her hips onto
his fingers. It’s not different or hard, he just does what he remembers they
would do to him and what he knows she likes from previous times with Eren.
Soon, her body tenses and he can feel her squeeze his fingers as waves of
pleasure roll over her and a soft groan is rumbling in her throat. Eren's
lightly pressing kisses to her face and Armin slowly and carefully curls his
fingers a couple more times to let her ride out the orgasm before he slowly
pulls his fingers out. He watches her pant as she tries to catch her breath,
one hand on her chest. He presses a kiss to her stomach before moving back to
his bed to grab a sheet.
"Can someone help me?" he asks, wiping his stomach and dick clean from cum.
Eren's up, grabbing the sheet and swiping it over his back and then his own
dick. Then he takes care of Mikasa, swiping her stomach and between her legs.
Armin leans over Mikasa to press a light kiss to her lips and he can feel her
smile slightly against him before she kisses him back.
Armin and Eren curl up on her side, leaving the covers and random articles of
clothing on Armin's bed. It's hard sharing Eren's one pillow but they make it
work, with Eren and Mikasa's heads on the pillow and Armin resting his on
Mikasa's shoulder.
"I'm sleeping in your bed tonight," Eren mutters. Armin looks up to stare at
him.
"But, I don't want to sleep here," he whimpers. Eren gives him a look.
"We can just share your bed," he points out. It's something that they did
sometimes. Armin shrugs and lies back down. Honestly, it's a little too hot
lately for two people to be so close and having the three of them is almost
unbearable but he's too happy for the closeness they rarely get to share. It's
quiet for a long time as they rest, slowly cooling off and falling back into
drowsiness.
"I missed you two," Mikasa whispers very faintly. Armin smiles and he can feel
Mikasa ruffle his hair a bit.
 
Two nights later, after the lights are out, Mikasa feels her bed shift and she
figures maybe Ymir or Krista had gotten up to pee or something but the person
stops at her bed, rolling into her bed. They quickly crawl under the covers and
reaches for her hand and then she realizes it's Armin. She leans forward,
pressing a kiss to his face (where exactly, she's not sure), before giving him
some of her pillow. She wakes him up in the morning so he can get back to his
bed before anyone else woke up and Armin's face nearly disappears before he
pops back up and leans forward for a kiss with a soft smile. Mikasa smiles back
at him and presses forward, pressing a soft kiss to his lips as he leaves.
End Notes
     i apologize for this fanfic.
Please drop_by_the_archive_and_comment to let the author know if you enjoyed
their work!