
Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/2776472.
  Rating:
      Explicit
  Archive Warning:
      No_Archive_Warnings_Apply, Underage
  Category:
      M/M
  Fandom:
      Haikyuu!!
  Relationship:
      Tsukishima_Kei/Yamaguchi_Tadashi
  Character:
      Tsukishima_Kei, Yamaguchi_Tadashi
  Additional Tags:
      incubus!Yamaguchi, PWP, Plot_What_Plot/Porn_Without_Plot
  Stats:
      Published: 2014-12-15 Words: 2178
****** I Promise ******
by Crazy_Gaze
Summary
     An incubus…Tsukishima racks his brain for the familiar term.
     A male sex demon.
     Oh.
     Shit.
Notes
     I have an analysis to write so this is unedited (read: YOLO) and
     posted within minutes after I finished ok.
     God, I have so many problems and prioritizing fanfic is so many of
     them. ( ;-;)
     I feel like every fandom should have an incubus or succubus, ya feel?
     Soo Incubus!Yamaguchi is happening and I know incubus-es, incubi??
     are suppose to 'prey' on women while they sleep but aha fuck tha t
     noise I want Yama with a lovely scent, hella gay, and asking for
     consent (◡‿◡✿)
See the end of the work for more notes
The blond is abruptly startled to consciousness when he hears a loud thud. He
sits up and looks around his room blearily before deciding he must’ve dreamt it
and falls back on his pillow, his limbs sluggishly drag the covers back up and
he yawns.
Tsukishima approaches sleep again before he faintly picks up an alluring scent.
What a nice smell…
Tsukishima knows he’s dreaming but it feels all too real. He inhales and the
sickly sweet smell is stronger but he can’t be bothered to figure out what it
is. He breathes in deeply and sighs, the scent seems to envelop him and he
can’t get enough of it. What is it…?
He feels the bed dip and then there’s the weight of something atop of him.
There’s a pair of hands running over his chest and he slowly opens his eyes
unhurriedly. He doesn’t feel panicked or fear surprisingly just calm and
breathing in that wonderful scent and letting those warm hands explore.
Not surprisingly, he can’t see shit. It’s dark and the only light is moonlight
from the open window on the left side of his bed.
“Who are you?” He asks, his voice breaks and is thick with sleep.
“Hmm, I can be whoever you want…” The hands go up his chest and caress his neck
and jaw lightly.
“I can be a celebrity, a crush, a lover, anyone…” Warm breath skims his jaw and
the person carefully stretches out on top of Tsukishima’s body. He spots
something moving behind the person. What the fuck is that.
Tsukishima squints slightly and discovers that it’s a tail. A tail with the
point at the end. Just like a demon?
“Oh no, I’m not a demon…sort of, I’m not here for your soul or anything. I just
need to eat a bit today is all”
The demon is not a demon. Well that’s reassuring.
There’s a light airy laugh and suddenly there’s light kisses at the side of his
jaw. Tsukishima tilts his head one way and unconsciously gives them more room.
“You have no one in mind? Well that’s okay I guess. I’ll be in your care,
Tsukki” What type of name is that he scoffs.
The blond offhandedly notes how the room is slightly brighter and he can kind
of see the person now. The faint moonlight filters through the window and
bathes the person’s body in a pale glow. He watches as the sleek black tail
swish back and forth like a feline’s. “What are you then?” The blond asks.
“Mmm, ever heard of an incubus?” He feels them nuzzle deeply into his neck.
“You smell very nice” They purr.
An incubus…Tsukishima racks his brain for the familiar term.
A male sex demon.
“No, no, don’t worry, Tsukki. Your virtue is safe, I told you-” The incubus
taps him on the nose. “-I just need a little meal today. Got a big day tomorrow
y’know?” He chuckles and presses a small kiss to the blonds’ lips.
“This is all a dream you’ll forget about in the morning, Tsukki. Will you feed
me for tonight?” His question takes a second longer to register with the blond.
A dream, huh?
Tsukishima shrugs and nods in the slightest. The other makes a happy noise and
gives him a longer, grateful kiss.
“C’mon, you’re allowed to touch too.” He nudges Tsukishima’s arms that are
still lying beside him.
Hesitantly, the arms rise up and rest at his bare hips. His skin is soft and
silky to the touch. Tsukishima runs his hands up his back, and feels a shiver
go down the other’s body. “What am I suppose to call you? You already know my
name and gave me a stupid nick name to boot.”
“Is it really that important?” The incubus hums casually.
Tsukishima feels a hot wet tongue licking stripes up his neck and he moans
softly. “You can read my mind, I’d like to think it’s only fair.” He remarks
with slight irritation. The demon nibbles lightly on his ear lobe and sighs.
“I don’t usually give people my name…Maybe if you could convince me?” the
incubus leans back just enough that Tsukishima can barely see the other’s face.
He can make out brown hair, freckles and a coy smile. “Troublesome…” He
mutters. His hands move down from the sharp shoulder blades and travel lower
and lower. Tsukishima can feel hotness flooding his cheeks but it’s dark so at
least the other can’t see him.
His fingers spread apart and take in the roundness of the other’s ass. He
squeezes experimentally and the incubus, who is back to biting his neck, gives
him a murmur of approval.
He gropes his ass with less reserve now, he gropes, pinches, pulls them apart,
and within minutes, the incubus is rocking on top of him with soft noises
slipping out of his mouth. The blond can definitely feel a hardness press down
on his own groin.   
“Name.” He states, his hands travel to his lower back and rakes his nails up.
Tadashi arches beautifully with a sharp breath.
“You can call me Tadashi.” He kisses the blond with a smile on his lips. “C’mon
Tsukki, I want you nice and hard for me… Please?” The boy groans.
Tadashi shifts lower, bringing the blanket with him. He smoothes his hands over
the front of Tsukishima’s pants and the blond watches him quietly with a dazed
embarrassment. He places a kiss on it before nuzzling him through his pants
fondly. Tadashi parts his lips and set it over the thin pajama pants and
boxers.
Tsukishima covers his mouth as he groans. He can feel the brunette’s tongue
soak through the fabric.
Shamelessly, Tadashi licks at the wet spot and smiles when he sees Tsukishima
grow hard. “I can’t wait Tsukki.” He now has one hand palming the growing
erection and he looks up at Tsukishima with a lustful and hungry look. “I can’t
wait till you so deep in my throat, it’ll be so good, Tsukki. Big and hard in
my mouth, can’t wait, Tsukki” He moans.
The blond tries to act like those lewd words don’t affect him but his dick
twitches and grows harder with every slide of Tadashi’s palm. His head is
tipped back and he’s panting, Tsukishima groans softly when the other goes back
to licking him through the fabric. The alluring scent from earlier is now thick
and heady in the air.  
Tadashi pulls away and licks his lips, gingerly reaches for the waistband. He
pulls the pants down and bites his lip when he sees Tsukishima’s stiff erection
stand in the open air. He looks up at Tsukishima and smiles fairly innocently
for something that’s planning to go down on him. “Thank you for the meal” He
sings.
Tsukishima is about to remark but he throws his head back and his hips buck.
Shit, Tadashi just went straight down. He groans and tries to still himself but
it’s difficult. Not when Tadashi keeps humming, and the vibrations are going up
and down his dick.
The other pulls off and surely that pitiful noise didn’t come out of his
throat?
“Tsukki…” Tadashi purrs and he rubs his cheek against his slick erection
affectionately.
“You can move. I won’t choke, I promise I won’t.” He sighs happily and press
kisses up to the crown where he suckles on the moist tip of his cock.
Tsukishima watches him with his breathing coming out fast and shallow. Tadashi
looks up at him with slight amusement. Tsukishima narrows his eyes.
Fine then.
Boldly, Tsukishima reached down, tangling his fingers in the messy brown hair.
He quirked a small smile and tightened his grip on Tadashi’s head. He tilted it
back and nudged his cock between Tadashi’s plump lips again, the other watching
him heatedly and accepted him in his mouth.
“Ready?” Tadashi had a second before Tsukishima’s cock was deep in his throat.
He let out a muffled noise of surprise and Tsukishima smirked as he fucked into
his mouth.
True to Tadashi’s word, he didn’t choke. He sucked with fervor and moaned as if
he was the one getting sucked off.
God, he was so happy to suck his cock wasn’t he? Tadashi made a noise of
confirmation and Tsukishima cursed loudly.
His orgasm hit him quickly and his hips stuttered against Tadashi and he
covered his moan with his free hand. The incubus’s nose pressed to his blond
curls and Tsukishima feels him swallowing everything, his face lewdly happy.
“Fuck, Tadashi” He croaked.
Tadashi pulled his mouth off his limp dick and lapped at the twitching head
coaxing the last bit of white essence out. He pressed one last kiss to it and
carefully tucked him back into his boxers and pants and smiled up at
Tsukishima. “That was a lot Tsukki, thank you for feeding me!”
Tsukishima scoffed and slid his hand from the top of Tadashi’s head to his
cheek where he pinched and pull it. “You’re surprisingly polite for a sex
demon. Cheeky too.” He ignored the protests of ‘Chukki iff hurfs, Chuukki!’
When Tadashi finally pried his pinching fingers off his face he mock glared at
the blond while rubbing his sore cheek. “I suck your dick and this is how you
thank me?”
“Technically I didn’t ask you to, you came here on your own.” Tsukishima points
out.
“Y-yeah, well…” Tadashi stutters. Tsukishima rolls his eyes and tugs the other
up to his chest. “Are you still hard?”
“O-oh um, it’s okay. I’ll manage, I always do.” He waves off his concerns.
Tsukishima frowns. “Let me jerk you off. As thanks.” He adds dryly.
“Nono, it’s okay Tsukki, you don’t have to-” “I want to.” He interrupts.
Tadashi turns slightly pink.
“Um, okay. Thank you, Tsukki” He says with a grateful smile.
“I’m just jerking you off; it’s not a big deal.” The blond mutters, avoiding
eye contact. Tadashi crawls off to the side and Tsukishima sits up crisscrossed
with his blankets pooling around him. “C’mere” He pulls the blanket aside and
pats his lap. He’s being uncharacteristically nice and affectionate but he
brushes the thought away. It’s a dream…only a dream.
Tadashi climbs into his lap and Tsukishima pulls the blanket over them. “Don’t
you get cold being naked all the time?”
“I’m not naked all the time, Tsukki. Just when I’m on the hunt for some dick.
Or pussy. I dunno, depends on the day.” Tadashi leans back into his chest and
inhales deeply.
Tsukishima rolls his eyes again and he brings his hand to Tadashi’s face.
“Lick.” He feels his wet tongue lick wetly at his palm and if he hadn’t just
came a minute ago, he would’ve gotten hard again.
His hand pulls away and finds its way to Tadashi’s throbbing erection. He holds
it in a light grip and the other rests on Tadashi’s smooth stomach.
“Ah, Tsukki…” He sighs and Tsukishima begins jerking him off. It doesn’t take
long for Tadashi to become slick with precum and Tsukishima’s hand moves faster
up and down his cock. Tadashi curls in on himself with soft moans and squirms
in Tsukishima’s lap.
His fingers run over a particularly sensitive spot on the underside and “Mmm
there…A-ah” He pressing back and the blond rubs that area with a little more
zeal. Soon, clutching Tsukishima’s pants, Tadashi spills all over his hand with
a small cry.
While Tadashi is panting and taking a moment to recover, Tsukishima reaches
over to his desk and grabs some tissues. He cleans up his hand then wipes up
Tadashi silently. They sit together for a while before Tsukishima begins to
feel drowsy again. The incubus yawns and shifts off his lap, leaving him cold
and bare.
Tadashi moves to get up from the bed but Tsukishima’s hand shoots out to hold
his wrist. “Stay. Till I fall asleep.” He says and he can feel Tadashi
hesitate. He takes this moment to pull him back and they both fall back into
his bed. Tsukishima brings the covers up and pulls Tadashi close. He feels
tentative hands wrap around him and snuggle closer.
“Just till you fall asleep” Tadashi whispers and Tsukishima can already feel
the tendrils of sleep envelop him. He just barely registers the light kiss
pressed to his lips.
LITTLE EPILOGUE OHO
Tsukishima sat at his desk and stared out the window, bored, as the teacher
called out names for attendance. In the back of his head he hears the teacher
make an announcement. There’s a new transfer student.
“Introduce yourself young man.” The teacher ushers him to the front.
“R-right, um. Hello nice you meet you all, my name is Yamaguchi Tadashi.”
Tsukishima’s ears perked up and his eyes darted to the figure at the front of
the classroom. There was one thing last night that the incubus said but didn’t
promise.
“I hope to get along with you all.” Yamaguchi smiled impishly and looked with
knowing eyes to where the blond sat staring.
He didn’t forget.   
End Notes
     IM SUCH A LOSER I NEED TO DO MY HOMEWORK HOLY BALLS IT'S LATE,
     GOODNIGHT EVERYONE
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