Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/12215730.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M
  Fandom:
      Haikyuu!!
  Relationship:
      Iwaizumi_Hajime/Oikawa_Tooru, Iwaizumi_Hajime_&_Oikawa_Tooru
  Character:
      Iwaizumi_Hajime, Oikawa_Tooru, Aobajousai_Volleyball_Club, Kindaichi
      Yuutarou, Hanamaki_Takahiro, Matsukawa_Issei, Iwaizumi_Hajime's_Mother
  Additional Tags:
      Friends_to_Lovers, Friends_With_Benefits, Childhood_Friends, High_School,
      Explicit_Sexual_Content, Smut, Fluff_and_Smut, Anal_Sex, Blow_Jobs, First
      Time_Blow_Jobs, Bottom_Oikawa_Tooru, Riding, First_Time, First_Kiss, Best
      Friends, Oral_Sex, Face-Fucking, Anal_Fingering
  Stats:
      Published: 2017-10-15 Words: 5673
****** a natural progression ******
by cassisorange
Summary
     It’s a natural progression of events, or so they tell themselves.
     They’re friends - best friends, childhood friends - but friends
     nonetheless. Nothing more.
     “It’s because we’re best friends that I wanna do it with you, Iwa-
     chan,” Oikawa says pointedly. “There’s absolutely no way we’d end up
     dating!” He says it with such conviction that Iwaizumi barely notices
     the way the words cut into him deep and raw. Oikawa’s always been
     good at that - sugarcoating the harshness of his words with a sweet
     tone and a bat of his long eyelashes. Even after all these years,
     Iwaizumi’s somehow still not immune to it. Sometimes, he finds
     himself lost in Oikawa’s warm, brown eyes. His ears focus on the
     playful rise and fall of his voice rather than the actual words
     coming out of his mouth, and before he realizes it, Oikawa’s
     convinced him to do something he’d been adamantly protesting ten
     seconds ago.
Notes
     Starts off with a flashback to when they were in their second year of
     high school, but they're presently third years/18 years old (tagged
     as Underage just to be safe).
     UPDATE [10/15/17]: Fixed some weird formatting and added a teensy
     epilogue thing because the ending felt abrupt.
See the end of the work for more notes
It all started one year ago. Of course it Oikawa who brought it on; he was
always the one who initiated.
“Iwa-chan, you awake?” he asked out of habit.
He already knew from Iwaizumi’s unnaturally quiet breathing that he wasn’t
asleep yet. After years and years of sleeping over at each other’s houses, they
became attuned to each other’s habits, from the sound of their footsteps to the
way they took their shoes off when they returned home, and even the way they
undressed - Oikawa knew Iwaizumi liked to pull his shirts off from behind,
while Oikawa preferred to cross his arms and pull his shirts from the hem up
(“It keeps your shirts from stretching, Iwa-chan,” he said matter-of-factly).
It’s probably all these years of observing Iwaizumi so closely that’s led
Oikawa to become so perceptive of people in general. It’s not that Iwaizumi
isn’t expressive, though Oikawa has teased him about having Resting Bitch Face
before. It’s just that Iwaizumi tends to express himself through other means -
 the strength of his spikes, a slight furrow in his brow, the amount of force
he uses when he closes his locker - and it takes years of getting to know him
to pick up on all these subtle cues.
“Mmm,” Iwaizumi grunted in response. Oikawa gauged the level of irritation and
tiredness in his voice to be relatively low, so he pressed on.
“Do you get curious about sex?” he asked.
“Huh? Well... yeah,” Iwaizumi said. “Don’t you? Is this about today’s class?”
They were in their second year of high school, and earlier that day they
reached the reproductive unit in their health class. The two of them were among
the few students who listened to their teacher intently, amid the muffled
laughter at every mention of genitalia. The lesson only covered PIV sex, which
was understandable since the unit was on reproduction, but left much to be
desired.
“Do you masturbate, Iwa-chan? Do you watch porn?”
Iwaizumi felt his face grow hot, but he knew Oikawa would be persistent if he
didn’t answer.
“Y-yeah, I guess.”
After that night, the topic of sex continued to make its way into their
conversations every now and then, when Oikawa’s mind kept him up late at night,
brimming with thoughts and feelings and unexplained urges. (“Iwa-chan, how many
times a week do you jerk off?” “Iwa-chan, what sites do you use?” “Iwa-chan,
what do you use as lube?”) And every time, Iwaizumi answered as casually he
could. That’s how their dynamic has always been. Oikawa was the talker;
Iwaizumi was content with listening. Even though Iwaizumi wasn’t one to return
the questions, Oikawa sensed his unspoken curiosity, and once in a while he
made sure he shared too, so that Iwaizumi never felt like their conversations
were a one-sided interrogation.
===============================================================================
It’s a natural progression of events, or so they tell themselves. They’re
friends - best friends, childhood friends - but friends nonetheless. Nothing
more.
Iwaizumi still hesitates at first. It was supposed to be just another typical
night. They alternated sleeping over at each other’s houses - tonight is his
turn to sleep over at Oikawa’s. Then it occurs to him that maybe Oikawa’s been
planning this, and he timed it with the next time Iwaizumi stayed over. Devious
asshole.
“It’s because we’re best friends that I wanna do it with you, Iwa-chan,” Oikawa
says pointedly. “There’s absolutely no way we’d end up dating!” He says it with
such conviction that Iwaizumi barely notices the way the words cut into him
deep and raw. Oikawa’s always been good at that - sugarcoating the harshness of
his words with a sweet tone and a bat of his long eyelashes. Even after all
these years, Iwaizumi’s somehow still not immune to it. Sometimes, he finds
himself lost in Oikawa’s warm, brown eyes. His ears focus on the playful rise
and fall of his voice rather than the actual words coming out of his mouth, and
before he realizes it, Oikawa’s convinced him to do something he’d been
adamantly protesting ten seconds ago.
“You’re just as curious as I am about sex,” he continues without batting an
eye. “Masturbating is great and all, but doesn’t it still feel like there’s an
itch that you can’t reach?
Now that we’re third years, we’re going to be even busier than before. We have
our captain and vice captain duties, and we’ll be practicing nearly every day
until preliminaries. There’s no way we’re gonna have time to find someone - you
remember what happened when I tried to date last semester with Ami. That’s why…
it has to be us!”
Clearly Oikawa’s given it some thought.
Iwaizumi tries to come up with a counter argument, but it’s too late. His
mind’s drawing a blank - he’s already picturing his best friend’s naked body,
flushed and writhing underneath him, and he blushes furiously. Wasn’t this
crossing a line? Was it normal for best friends to fuck casually? He briefly
wonders if Hanamaki and Matsukawa had sex. Then he shakes his head rapidly to
dispel the unholy thoughts of his teammates and mentally apologizes to them.
“Sorry, Iwa-chan,” Oikawa says suddenly. “I don’t wanna pressure you or
anything, I just-”
“... fine,” he mumbles.
“-thought you might be on the same p- huh?” Oikawa freezes.
“I said fine,” Iwaizumi repeats. The flame within him has already been ignited,
and he throws all caution to the wind. “Fuck it, let’s have sex.”
Iwaizumi’s not sure where the sudden rush of adrenaline comes from. Oikawa’s
not wrong; sometimes jerking off alone just doesn’t cut it. Iwaizumi’s just
never really thought about it that much, and he hadn’t even considered having
sex with someone as a possibility. His body’s moving faster than he can think,
and by the time his mind catches up, he’s already pushed Oikawa down on his bed
and scrambled on top, arms propped on either side of his head.
Then Oikawa opens his mouth and poses a question that momentarily snaps him
back to his senses.
“Do we- uh, should we… kiss?”
Iwaizumi looks into Oikawa’s eyes, trying to get a read on him. Should they? To
his understanding, what they were about to do was strictly physical and not
romantic. Kisses were romantic, to him at least. Maybe that was just him being
a sap.
“Nah.”
Iwaizumi tries to sound nonchalant. He leans down as if to kiss Oikawa, but
then veers off to the side and presses his lips to his neck instead. Oikawa
gasps softly at the contact, and his arms reflexively reach around Iwaizumi’s
back to pull him closer. He squirms as Iwaizumi trails light kisses all over
his neck and jawline. He slips his hands underneath Iwaizumi’s T-shirt and lets
his fingers roam, mapping the swells and dips of every muscle and bone in his
back.
“Iwa-chan,” Oikawa whispers breathlessly. “You can… I want you to leave marks.”
The low rumble of Iwaizumi’s growl goes straight to his groin. Oikawa lets out
a needy moan as Iwaizumi’s lips latch onto his neck and begin sucking. He feels
a little shameful at how aroused he is just at the thought of being covered in
hickeys and bite marks the next morning. Then Iwaizumi parts his lips and bites
the juncture of Oikawa’s neck and he almost screams - he has to clap a hand
over his mouth to muffle the sound.
Iwaizumi scoots lower and lifts Oikawa’s shirt up to reveal his pale, slender
torso. He continues to leave biting kisses along his collarbone and chest and
then swirls his tongue around a nipple. Oikawa’s mind is hazy with pleasure,
but he’s also taking note of all the discoveries he’s making about his own
body, sensitive points that he didn’t know existed and wouldn’t have been able
to find on his own. He wonders if Iwaizumi’s known about them somehow, or if
he’s just stupid lucky.
Iwaizumi sits up and his eyes trail down Oikawa’s body hungrily.
“Strip,” he growls.
Despite being captain, Oikawa knows that Iwaizumi is just as capable of taking
charge. He doesn’t realize it, but he’s able to lead the team in ways that
Oikawa can’t. He’s blunt and assertive, and it’s times like these that Oikawa
is more than happy to hand the reins over to his right hand man. He hastily
slips the T-shirt over his head and tosses it aside. Then he wiggles his hips
and lets his pajama pants slip down so that he can kick them off.
“So lazy, Trashykawa,” Iwaizumi snorts, reaching behind his head to pull his t-
shirt off.
“Mean, Iwa-chan.” Oikawa sticks his tongue out.
Slipping into their usual banter puts them both at ease. Once Iwaizumi’s
sweatpants are off, he resumes his position straddling Oikawa’s hips and runs
his hands along the length of his body. Oikawa bristles with anticipation.
Beautiful, Iwaizumi almost says out loud.
“You need to bulk up a little,” he huffs instead, but there’s an appreciative
look in his eyes.
Oikawa’s lower lip juts out defiantly - Iwaizumi can practically hear the sing-
songy response in his head (“I’m still hot no matter what~”) - and he wants so
badly to kiss the pout away.
“You need to grow taller,” Oikawa teases. It's a low blow - the five centimeter
difference in their heights is one of the few things Iwaizumi is openly
insecure about.
“You need to stop talking.” They’re still in their boxers, and Iwaizumi grinds
their clothed, half hard lengths against each other. They both groan at the
long-awaited friction. It’s good, but it’s not enough.
“Make me,” Oikawa challenges. The two words are enough to make something in
Iwaizumi snap. He sits up on his knees and scoots all the way up so that his
crotch is just above Oikawa’s chin.
“Suck,” he says evenly.
Oikawa nods wordlessly and removes Iwaizumi’s boxers with a sharp tug, reveling
in the way his dick springs up. It’s not their first time seeing each other
naked, but this, this is different. Oikawa takes a moment to just stare at the
dick that he’s about to take in his mouth. It’s thick, and the head is already
shiny with pre-cum.
A sudden realization hits Oikawa: he’s never given head before.
Sensing Oikawa’s panic, Iwaizumi reaches forward and threads his fingers
through Oikawa’s soft brown hair in an attempt to reassure him.
“Just… uh, don’t use your teeth,” he says gruffly. “I’ll tell you what feels
good. This is a first for both of us, so don’t worry so much.”
Oikawa nods again and tentatively swirls his tongue around the head, making
note of the taste, Iwa-chan's taste. It’s a little salty, a little bitter, but
not unpleasant. He parts his lips and guides the head into his mouth. He hears
Iwaizumi let out a shaky breath and looks up at him.
Iwaizumi wants to burn into his memory the sight of Oikawa’s lips stretched
around his dick and the way he’s looking up at him, the adorable uncertainty in
his round eyes contrasting with the dick in his mouth.
“You’re doing good,” he murmurs, and Oikawa takes it as a cue to open wider and
let Iwaizumi sink down. He takes in about two thirds of Iwaizumi’s length when
he feels the head touch the back of his tongue. He glances up at Iwaizumi and
he nods in understanding.
Oikawa begins bobbing his head up and down, letting Iwaizumi’s cock slide in
and out of his mouth. He’s barely using any suction though, and as endearing as
he looks right now trying his best, the sensations aren’t enough for Iwaizumi.
“Oikawa,” Iwaizumi says gently. “Suck harder.”
Oikawa obeys and hollows his cheeks experimentally. Iwaizumi groans and
tightens his grip in Oikawa’s hair. He tries to pick up the pace, but it’s
tiring on his neck, so he ends up propping his head up with a pillow and lets
Iwaizumi fuck into his mouth. He looks up at Iwaizumi and watches him intently.
His eyes are lidded and he’s panting lightly. Oikawa knows he’s not faking, and
he feels a sense of triumph knowing that he’s the one drawing these reactions
out of Iwaizumi.
Unfortunately his jaw is straining to stay open, and he taps Iwaizumi’s thigh,
signaling for him to pull out.
“Sorry, Iwa-chan,” he apologizes. “My mouth is tired.” There’s a slight rasp in
his voice, and his lips are wet with saliva and pre-cum. Iwaizumi wants to
trace those lips with his dick. Next time, he thinks to himself.
“So… how is this gonna work?” Iwaizumi asks. “Who’s doing who?”
Oikawa giggles despite himself.
“I’ve been fingering myself, so I think it’ll be easier if you fuck me.”
Iwaizumi’s brain short circuits and he almost comes from the mental image
alone. He takes a moment to collect himself and then narrows his eyes at
Oikawa.
“You’ve been planning this,” he says.
Oikawa just grins mischievously and motions for Iwaizumi to move aside. He
reaches into the nightstand and produces a small bottle of lube along with a
string of condoms. Iwaizumi simply watches in stunned silence as Oikawa flips
over onto his knees, his ass on full display. He coats his fingers with the gel
and begins by inserting his middle finger. Even though he’s done this a couple
times, it’s still uncomfortable at first, and he grunts at the intrusion.
Iwaizumi wonders if he should be helping. He feels like he’s watching something
that isn't meant for his eyes, but he can’t seem to look away.
“Relax,” he says, because he has no idea what else to say.
“Easy for you to say,” Oikawa retorts, but he does relax now that the silence
has been broken. “You’re not the one- ah- getting something shoved up their
ass.” His voice hitches when he inserts a second finger and begins stretching
his hole.
The thought of bottoming for Oikawa briefly crosses Iwaizumi’s mind, and he’d
be lying if he said he wasn’t even the slightest bit curious.
"You sure you're okay?" he asks.
Oikawa curls his fingers and starts wiggling them around. He thinks about how
his hole’s going to be filled within the next minute or two, and his dick
twitches. He wants this so, so badly. He’s about to respond to Iwaizumi when
his fingers find his prostate and instead he lets out a sharp cry.
“Found it,” he laughs breathlessly. He adds a third finger and continues to rub
at the spot. After several more thrusts, he pulls out his fingers and passes
Iwaizumi a condom.
Iwaizumi’s sure Oikawa can hear his heart thudding as he tears open the foil
and rolls the condom down his length, fully hard now after watching Oikawa
finger himself. He inches forward and positions himself behind Oikawa’s ass,
placing a hand on his hip to steady him.
“Ready?” Iwaizumi can feel the tremors running through Oikawa’s lithe body. “We
don’t have to do this if-”
“Yes,” Oikawa says quickly. “Please.”
Iwaizumi tentatively touches a finger to Oikawa’s lubed hole, wondering how the
hell he’s going to fit even after Oikawa stretched himself. He takes hold of
his dick and traces his head against the opening. Oikawa braces himself as
Iwaizumi slowly pushes in, the tip breaching the ring of muscle.
“Iwa-chan.” Oikawa's voice is strained. He knows it’s going to be a tight fit
with how thick Iwaizumi is, but he takes a shaky breath and tries his best to
relax his tense muscles.
Iwaizumi groans at the tight heat enveloping the head of his dick. He bends
down and presses a kiss to Oikawa’s spine in an effort to calm his nerves. He
can feel Oikawa begin to loosen up after taking deep breaths and he begins to
continue pushing forward bit by bit until his hips are flush with Oikawa’s ass.
His dick twitches reflexively and Oikawa whimpers at the unexpected movement
inside him.
Now that Iwaizumi is fully in, it takes every ounce of self control in his body
to not start ramming into Oikawa. He tries counting backwards from ten to try
to distract himself and give Oikawa time to get used to the intrusion. He feels
Oikawa tighten experimentally and the sensation sends a wave of heat down his
groin.
“You can start moving, Iwa-chan,” Oikawa says finally.
Iwaizumi exhales and begins thrusting shallowly, inching his hips back ever so
slightly and then pushing back in. It’s painstakingly slow and isn’t nearly
enough friction for either of them, but it’s their first time and he wants to
savor the moment - the last thing he wants to do is inflict pain on his best
friend. Once Iwaizumi feels like Oikawa’s gotten used to his ministrations, he
begins to pick up the pace and starts bucking his hips faster, pulling out more
and thrusting back in sharply. Oikawa has to stop to readjust his hips every
once in a while but eventually Iwaizumi manages to reach Oikawa’s prostate and
he has to bury his face in his pillow to muffle the moans spilling from his
lips.
At some point, tears start forming in Oikawa’s eyes. They aren’t face to face,
so Iwaizumi doesn’t notice at first but then he realizes Oikawa’s moans are
turning into sobs and he abruptly halts his movements.
“Oikawa, are you hurt?” he asks worriedly. Oikawa shakes his head rapidly.
“Keep… keep going,” he half-sobs, half-gasps. It’s not pain that’s making him
cry - on the contrary, it feels amazing and he’s so, soclose to cumming. The
sensations, the intimacy, it’s all so new to him and he’s brimming with all
sorts of emotions that he can’t even begin to unpack.
He comes with a sharp gasp and his entire body shudders as he clenches around
Iwaizumi and rides out his orgasm.
Once they’re all cleaned off, Iwaizumi rejoins Oikawa in his bed. They’ve
gotten used to sleeping separately whenever they sleep over each other’s
houses, so the bed is more crowded now, but neither of them complains.
Even though Oikawa’s taller, he inches down on the bed so that he can tuck his
head under Iwaizumi’s chin. They wrap an arm around each other’s backs and
press their bodies together. Somehow this position just comes naturally to
them.
Without thinking, Iwaizumi brushes Oikawa’s bangs away from his damp forehead
and plants a soft kiss before he remembers their arbitrary no kissing rule.
This was fine, right? It’s not like it was a kiss on the lips, he rationalizes
with himself. Oikawa sighs contentedly.
“Are you okay?” Iwaizumi asks.
“Mhmm.” Oikawa knows it’s not a sufficient answer, but he’s hoping Iwaizumi
doesn’t pry. He doesn’t feel like talking right now.
===============================================================================
In the morning, their bodies are miraculously still slotted up against each
other. Iwaizumi wakes up first, as he usually does. The first thing he feels is
the weight and warmth of something - someone - clinging to him. He blinks a
couple times and wriggles himself free, causing Oikawa to stir.
Their eyes shoot open and they stare at each other, taking a moment to reorient
themselves and recall last night’s events.
“Oh my God,” Oikawa whispers, eyes wide. “Iwa-chan took my virginity.”
Iwaizumi blushes and averts his eyes. He looks down Oikawa’s body and his jaw
drops. Oh shit, oh shit, oh shit-
“W-what is it, Iwa-chan?” Oikawa asks anxiously. “Iwa-chan, say something. Was
I bad? Did you not feel good? I-”
“No, dumbass,” Iwaizumi manages.
It’s too early for words. He gives up and simply gestures to the full length
mirror propped up against the wall.
Oikawa slides out of bed and stumbles towards the mirror, a dull ache in his
hips and thighs. He’s still stark naked, and Iwaizumi looks away out of habit.
He squawks when he finally makes it to the mirror and sees his reflection - his
neck and collarbones are littered with deep red hickeys and bruises.
“Oh my God. Oh my God.Wow, Iwa-chan, you really went to town-”
“Shut up, Shittykawa,” he groans, blushing at the memory. “You can cover it
with makeup, right?”
“Yep.” Oikawa makes an OK sign with his hand. “You use the bathroom first, Iwa-
chan. I’ll deal with this.”
Iwaizumi nods and swings his legs off the bed. He rummages through Oikawa’s
drawer and finds a pair of his own boxers. They’ve got so much of each other’s
clothes in their houses from all the years of sleeping over, they’ve stopped
trying to keep them separate. Their bottoms are slightly easier to tell apart -
Iwaizumi wears boxers while Oikawa prefers boxer briefs, and Oikawa’s pants are
a tad longer and slimmer than Iwaizumi’s. Everything else though is fair game,
especially T-shirts and hoodies.
After Iwaizumi enters the bathroom, he stares at his reflection in the mirror
for a good ten seconds.
Hajime, what the fuck have you gotten yourself into?
He tries to not make a big deal out of losing his virginity. After all,
virginity’s just a construct, and who you lose it to doesn’t really matter.
Except it’s Oikawa, his childhood friend, his best friend, and he does matter.
He matters a fucking lot.
When he returns to the bedroom, Oikawa’s still in front of the mirror,
meticulously dotting concealer on his neck and blending it in with his fingers.
“Um… sorry,” Iwaizumi mumbles bashfully, rubbing the back of his neck.
“No need to apologize, Iwa-chan,” Oikawa grins wickedly. “I asked, and you
delivered.”
Iwaizumi blushes furiously as he slips into his school uniform.
===============================================================================
Iwaizumi and Oikawa are in different classes, giving them some time apart.
Iwaizumi tries to keep his mind occupied by paying closer attention than usual
and fully immersing himself in his schoolwork. Once in a while, he slips up
while the teacher is droning on and on. Images from last night flash through
his mind - Oikawa sucking his dick, Oikawa fingering himself, Oikawa getting
fucked, Oikawa snuggling up against his chest. He mentally berates himself and
turns his attention back to his textbook, willing his blood to rush up to his
brain and not down south.
Oikawa, on the other hand, is an utter mess. Even though he did a decent job
concealing the hickeys, he still feels incredibly self-conscious when he’s
talking to his classmates and teachers. Typically, he enjoys idle chatter and
being the center of attention, but today he’s cursing himself for his extrovert
tendencies. He just wants to go home and curl up next to Iw-
Oikawa stops that train of thought before it can go any further.
The school day passes uneventfully. Iwaizumi and Oikawa meet up with the other
third years for lunch, and then for volleyball practice after school. Oikawa
takes extra care to not smudge the makeup on his neck when he changes into his
jersey but otherwise, practice begins as smoothly as always. They start with
light stretching and jogging before getting into drills.
Halfway through, things start going downhill.
Both Iwaizumi and Oikawa are slightly distracted, and it’s evident once they
start their 4v4 practice game. Oikawa’s lacking his usual grace - his movements
are a bit shaky and restrained. He makes up an excuse about how the two of them
stayed up late to do homework, and the team looks skeptical but they don’t push
it. Iwaizumi and Oikawa redouble their efforts to compensate, jumping higher,
spiking harder, running faster, and soon enough, they’re both dripping with
sweat.
“Kindaichi,” Oikawa calls. “When you block, make sure you’re keeping your
fingers closed.”
“Yes, Oikawa-”
Kindaichi’s eyes widen and he claps a hand over his mouth. His face is beet
red.
“Kindaichi? What’s wrong?” Oikawa asks.
Matsukawa whistles. “Holy shit.”
He points to Oikawa’s neck, where the makeup had melted off from the rigor of
their practice. Oikawa gasps and tries to pull the collar of his T-shirt up to
hide his neck, to no avail.
Everyone slowly turns to Iwaizumi, who’s pinching the bridge of his nose and
wondering if transferring schools during his senior year is possible.
“Homework, my ass,” Hanamaki smirks.
The entire team completely botches the rest of the practice, and Coach Irihata
makes them all do penalty drills as punishment.
===============================================================================
It’s been a week since they first had sex, and they’re itching to go at it
again.
They're both athletes to the core, and throughout the week they've been
mentally replaying their first time over and over, trying to find ways they can
improve their performance.
“Did it hurt last time?” Iwaizumi asks. Today they’re in his room; he’s already
shucked off his pants and tossed it in the general direction of his hamper.
“A little,” Oikawa admits. “In the beginning.” For the most part his hickeys
have faded away, save for a handful of pale brown spots. After that day at
practice, Iwaizumi vows to never leave them where they can be seen. It’s hard
though, when Oikawa’s pale, slender neck is so enticing and so damn sensitive.
“I wanna try riding you, Iwa-chan,” he proposes.
At first, Iwaizumi doesn’t like being pinned under Oikawa’s weight and having
his range of movements limited. He feels restricted and unsure of what to do;
his natural instinct is to take over. But then Oikawa sinks down onto him, and
once he’s gotten into a steady rhythm, Iwaizumi forgets about everything except
for the tight heat clenching around his length. He discovers how much he loves
squeezing Oikawa’s round, perky ass, pulling apart his cheeks and pushing them
back together.
When Iwaizumi feels himself getting close, something compels him to slap
Oikawa’s ass. Oikawa gasps, clenches harder, and comes all over his and
Iwaizumi’s torsos.
Once they’re settled in bed, Iwaizumi drapes an arm around Oikawa’s waist and
absentmindedly reaches down to fondle his ass.
“Iwa-chan, you really like my butt, huh?” Oikawa teases.
“Yeah, I do,” Iwaizumi says simply, punctuating his words with a firm squeeze.
“Assikawa.” Oikawa blushes, caught off guard by his bluntness.
Eventually, they fall into a routine. They go from doing it once a week to
twice a week, and with each time they gain a little more confidence. They’re
still learning, but they’re no longer awkward and nervous. They’ve gotten
comfortable with having sex and talking about it, and they have an idea of what
their preferences are.
They still don’t kiss.
After the hickey incident, they learn to be more subtle. Their teammates
haven’t forgotten about it, but they let it go. They notice the little things,
like the way Oikawa walks and sits gingerly the day after he and Iwaizumi have
sex. With Iwaizumi it’s not as obvious - he’s more energetic, and there’s a
spark of somethingin his eyes. Sometimes the other members catch glimpses of
bruises and scratches on their bodies while changing in the locker room but
they train themselves to avert their eyes.
===============================================================================
One morning, Iwaizumi’s mother pops her head into her son’s bedroom to wake
them up for school. At first, she’s confused by the lack of a futon on the
floor where Oikawa would normally be found, long limbs sprawled in all sorts of
directions. Then she looks to her son’s bed and sees the two of them holding
each other tightly, Oikawa’s face buried in Iwaizumi’s chest. It’s the exact
same position they slept in back when they were kids, she recalls, smiling to
herself. She quietly slides the door shut and then knocks, telling the boys
it’s time for them to wake up.
She can’t help but pry, as mothers do.
“You and Tooru have been having lots of sleepovers lately,” she casually
comments later that evening. Iwaizumi’s father is working late tonight, so it’s
just the two of them having dinner.
Iwaizumi continues shoveling rice into his mouth wordlessly.
“Are you two finally dating?”
Iwaizumi nearly chokes on his food.
“First of all,” he coughs. “What do you mean by ‘finally’?! There’s no way in
hell we’d date. We’re best friends.” He’s simply repeating what Oikawa had
said, but the words feel strange and foreign coming out of his mouth.
Iwaizumi’s mother chuckles.
“Hajime, you can be best friends with someone and love them romantically too -
they aren’t mutually exclusive. Your father is my best friend andmy love.”
Iwaizumi can’t believe he’s actually getting dating advice from his mother.
It’s awkward as hell, but he supposes there’s no one else he can really talk to
about these things.
“But isn’t it… weird?” he asks. He’s still trying to wrap his head around the
thought of being more than just friends with Oikawa.
“Why would it be weird? If anything, it makes it easier when you’re best
friends, since you already know each other so well. You just have to stop
thinking of friendship as the endpoint. If you ask me, I’d have thought you and
Oikawa were already dating for a long time,” she laughs. “Would anything really
change once you two start dating?”
Iwaizumi knows deep down that she’s not wrong. If he’s being honest with
himself, he and Oikawa are so deeply intertwined at this point, they’ve far
surpassed being just friends. The sex is pleasurable, without a doubt, but it’s
the post-coital moments afterwards that strike something deep within him. He
finds himself looking forward to holding Oikawa in his arms as they fall
asleep, feeling the rise and fall of Oikawa’s chest against his. He looks
forward to their hazy, morning-after moments. Iwaizumi’s always the first to
wake up, and he loves watching Oikawa stir and blink blearily as he comes to
his senses.
“You love him,” his mother says. It wasn’t a question.
Iwaizumi’s emotions are a whirlwind and he feels restless, even after taking a
long, hot shower later that night. He hates thinking too hard, being alone with
his thoughts - he needs to act - so he invites himself over to Oikawa’s house,
sending a text that simply says, “I’m coming over,” and once he sees Oikawa’s
thumbs up emoji he heads out.
“Is something wrong, Iwa-chan?” Oikawa asks when Iwaizumi enters his bedroom.
He must’ve already bathed as well; there’s the faint scent of soap in the air,
and he’s wearing his glasses in place of contacts. Damn it, he’s cute, Iwaizumi
catches himself thinking. They sit down on Oikawa’s bed, and Iwaizumi feels his
palms starting to sweat. He doesn’t really know what to say, so he just blurts,
“Oikawa, I’m going to kiss you.”
He wants to confirm his own feelings - and hopefully Oikawa’s too.
“H-huh? Wh-“
Before Oikawa can respond, Iwaizumi leans forward and presses their lips
together in a chaste kiss. He’s a bit too eager though, and lightly bumps into
Oikawa’s glasses. Iwaizumi’s heart is pounding, and he wonders if Oikawa can
feel it where their lips are connected.
When they pull apart, their faces are flushed. Oikawa’s eyes are wide with awe
and his lips remain parted.
“Iwa-chan…?”
“Oikawa, I’m in love with you,” Iwaizumi says quietly. “Have been, for a long
time - since we were kids, probably. I know we were supposed to be having sex
with no feelings involved, but thinking about it now, it was impossible from
the start… at least for me.”
Iwaizumi’s usually not one to think this deeply about his own feelings and
voice them out loud, and it catches Oikawa by surprise. Part of him almost
feels a sense of triumph, knowing that he was able to draw out this confession
from Iwaizumi, even if not intentionally.
“When did you get so cool, Iwa-chan,” he muses. “This isn’t at all how I
pictured this would happen.”
Oikawa rests his head against Iwaizumi’s shoulder. His pillar, his Iwa-chan.
“I felt it too, you know? Something was missing whenever we did it, but I was
too afraid to say it… and now I feel like I’ve lost to you, Iwa-chan.
I liked that kiss,” he says softly. “I’d like to do that more.”
“Just kissing?” Iwaizumi asks, almost teasingly.
“Well, whatever else people do when they’re… in a relationship…” Oikawa
mumbles.
“To be honest, there’s not much we have to change,” Iwaizumi laughs dryly,
recalling his conversation with his mother. “I’m pretty sure the team thought
we were dating ages ago. My mom, too.”
“So… we’re dating now?” Oikawa asks tentatively. He lifts his head to meet
Iwaizumi’s eyes.
“We could be,” Iwaizumi says, raising his eyebrows expectantly. “But I don’t
think I heard a confession from you.”
“Mean, Iwa-chan!” Oikawa whines. “You know that I love you.”
Definitely not what Iwaizumi had in mind, but he still blushes despite himself.
He kisses Oikawa again, and this time he tilts his head to avoid bumping noses.
===============================================================================
They’re settled in bed, bodies comfortably pressed one another. Iwaizumi feels
giddy, weightless, and he can’t stop peppering kisses all over Oikawa’s face,
starting with the top of his head and trailing down to his eyelids, cheeks,
nose, and then finally his lips. Oikawa adores this affectionate side of
Iwaizumi. He happily leans into the crook of Iwaizumi’s neck, basking in the
attention.
“Who would’ve thought you’d be so touchy feely,” Oikawa chuckles. “You’re like
a dog, leaving kisses all over my face.”
“Is that a complaint?” Iwaizumi huffs. “I’m just making up for all the kisses
we didn’t have before.”
“Oh my God, you’re such a sap, Iwa-chan.”
The next day at school, the two of them are still riding their newly
established relationship high. They keep the PDA down to a minimum but they've
both got a rosy flush in their cheeks whenever they're together. Iwaizumi is
very noticeably more cheerful than usual, almost to the point that it creeps
out Hanamaki and Matsukawa. During practice, they're both in top form, and
after a particularly satisfying spike, Iwaizumi and Oikawa reflexively run
towards each other. The team is expecting them to do their usual high-five or
fist bump, but to their shock, their captain and vice captain embrace and share
a kiss, right in the middle of the gymnasium. The first and second years' faces
turn red, their mouths agape, while the third years are whistling and whooping
in the background.
"Nice kiss, Iwa-chan!"
End Notes
     PIV (sex) = penis in vagina
     I'm such a sucker for friends w/ benefits even though they pretty
     much always end predictably, heh. Despite that I still tried to make
     this one a teeensy bit different from the usual. I just love their
     relationship so much. *clenches fist passionately* They truly are
     kindred souls.
     This_is_the_art_that_inspired_the_way_they_sleep_in_bed. /dies of
     tenderness overload
     I've had this fic in the works for about a month now, but I was stuck
     on the smut & the ending (and then I started my new job) so it took
     me a while to finally complete it. I'm still not 100% satisfied with
     it, but I've reached the point where I just want to move on and work
     on something new. ;u;
     As always comments & kudos are greatly appreciated and you can find
     me here on tumblr.
Please drop_by_the_archive_and_comment to let the author know if you enjoyed
their work!