Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/906002.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M
  Fandom:
      Kuroko_no_Basuke_|_Kuroko's_Basketball
  Relationship:
      Kasamatsu_Yukio/Kise_Ryouta
  Character:
      Kasamatsu_Yukio, Kise_Ryouta
  Additional Tags:
      Anal_Sex
  Stats:
      Published: 2013-07-31 Words: 1266
****** Belated Birthday ******
by cyparissus
Summary
     The day after Kasamatsu Yukio's birthday.
          “Senpai, tell me to stay here with you forever,” Kise says,
          propping himself up on his elbows to peer at Kasamatsu over
          the top of his textbook.
          “What, you’re still here?”
Notes
     I meant to write something for Kasamatsu's birthday, but didn't get
     around to it until the day after his birthday, so I made the fic
     about the day after his birthday, haha.
     Also this takes place while Kasamatsu is in college and Kise is still
     in high school (hence the underage warning).
When Kise emerges from the bathroom with only a towel around his waist there’s
a petty irritation hovering around the edges of his mind. He doesn’t have his
complete beauty product collection at Kasamatsu’s apartment; he has his travel
case with him, which only has the bare minimum of his usual products. He
reminds himself that he has to go back home today, and he comforts himself by
imagining his extensive assortment of hair and skin products in his bathroom at
home.
That comfort evaporates however when Kise turns the corner into the bedroom and
sees Kasamatsu sitting up on his bed. His back is against the headboard and his
knees are drawn up with a textbook resting on them; he’s shirtless as well,
wearing only a ratty old pair of sweatpants that Kise remembers from Saturday
pick-up games. Kise is overwhelmed temporarily by a wave of affection and
hovers in the doorway, his heart heavy with how lucky he is.
There are bags under Kasamatsu’s eyes and he’s scowling a little: symptoms of
the hangover he is no doubt sporting from the handful of drinks he’d had at the
party last night. It was his birthday party after all; people had spent the
whole night pressing drinks into his hands. Still though, Kise takes the
hangover as a compliment—the party had been a surprise for Kasamatsu (who could
be unpredictable about surprises) and Kise had been nervous about whether or
not Kasamatsu would actually like it. Initially he had threatened Kise with
grievous bodily harm, but he’d had a good time in the end, judging by the eager
and loudly appreciative way he’d pushed Kise into bed and fucked him senseless
after they got home.
It was still early in the day, but Kise had to be back home by that evening and
felt abruptly guilty for wishing he was home, especially when Kasamatsu made
him feel more at home here than anywhere else he’d ever been.
With that in mind Kise finally moved out of the doorway, flopping on his front
onto Kasamatsu’s bed with an overdramatic sigh.
“Senpai, tell me to stay here with you forever,” Kise says, propping himself up
on his elbows to peer at Kasamatsu over the top of his textbook.
“What, you’re still here?” Kasamatsu returns immediately, but his eyes are
twinkling as he shifts the book up to hide more of his face.
“You’re so cruel, Senpai!” Kise wails and rolls over to cling to Kasamatsu’s
legs, completely losing his towel in the process.
“Hey, hey! I’m trying to do homework here!” Kasamatsu squawks, but his protest
is weakened considerably when he moves the textbook out of the way and leans
toward Kise. Kise meets him in the middle and kisses him softly, humming
contentedly as he pulls back.
“I love you,” Kise whispers just to see Kasamatsu blush and smile softly.
“Put some clothes on,” Kasamatsu says back, glancing over Kise’s shoulder to
where Kise’s rear is exposed. Kise grins and arches his back, sticking out his
ass and wiggling it a little.
“But I thought you likedmy ass, Kachimatsu,” Kise says, affecting his most
cheerful, innocent voice. The pink tint of Kasamatsu’s cheeks turns crimson at
the memory of his drunken declarations last night. Kasamatsu doesn’t have an
immediate denial or insult, probably because he’s still staring at Kise’s ass,
and Kise’s grin turns into a devilish smirk.
“I think you’ve got a belated birthday present coming,” Kise purrs, rising up
on his hands and knees and crawling over Kasamatsu, loving the scandalized look
that comes over his face. He stretches out his legs and glances down Kise’s
body, looking halfway between eager and embarrassed.
“But—you gave me too many presents already,” Kasamatsu says, apparently unable
to cover the waver in his voice as Kise’s lips hover millimeters away from his,
“And aren’t you—sore? From last night?”
“Let me spoil you, Senpai,” Kise says, capturing Kasamatsu’s mouth in a
passionate kiss and palming his way up Kasamatsu’s thighs—Kise can’t help but
make a little pleased sound when he feels that Kasamatsu is already hard inside
his sweatpants.
“And besides,” Kise adds, giving Kasamatsu a few good strokes before he pulls
away to grab the lube from the bedside table, “I like it when I can feel you
for days after I go home.” Kasamatsu moans helplessly at that, his fingers
gripping tight at Kise’s hips. Kise slicks his fingers and shifts up onto his
knees to reach around and slide two fingers into himself. The preparation is
mostly perfunctory; Kise is still mostly loose from last night, but he knows
Kasamatsu will complain if he skips it. Kise works his fingers in and out of
himself, adding a third finger until he’s biting his lip and whining at the
sensation. When Kise finally removes his fingers and looks down, Kasamatsu is
looking up at him like he’s amazing, and when Kise makes eye contact Kasamatsu
scrambles for the lube.
Kise makes impatient noises while Kasamatsu slicks his cock, shifting his hips
restlessly until Kasamatsu growls and grabs Kise by the arms and drags him down
into a fierce kiss. Kise laughs into the kiss, reaching down to hold
Kasamatsu’s cock steady while he lines up and pushes down without breaking the
kiss.
Kise shoves his hips down, taking Kasamatsu down to the hilt in one stroke, and
Kasamatsu makes a sound like he’s been punched in the gut. It burns, but Kise
imagines thinking of this moment every time he sits down for the next couple of
days and that makes Kise move, gyrating his hips and gasping.
Kise braces both hands on the headboard and uses the leverage to fuck himself
up and down on Kasamatsu’s cock, breaking away from Kasamatsu’s mouth so he can
breathe.
“I’m not—not gonna last,” Kise gasps out, “You feel so good, Captain.”
Kasamatsu squeezes his eyes shut and groans, planting his feet on the bed and
pushing up to meet Kise’s thrusts. Kise can tell by the flush spreading all the
way down Kasamatsu’s chest and the fingers gripping his hips too tight that
Kasamatsu is right there with him, and Kise moves one hand down from the
headboard stroke his cock.
It only takes a handful of strokes before Kise’s thighs are trembling, right on
the edge of orgasm but desperately holding back, waiting for Kasamatsu first.
“Kise,” Kasamatsu says in a low, wrecked voice and holds Kise’s gaze, “Come.”
Kasamatsu’s eyes are so dark and his voice is so full of emotion that it shocks
Kise’s orgasm out of him, his back arching and tossing his head back as he
makes a high-pitched sound that he would be embarrassed about if he wasn’t so
busy with the ecstasy.
Kise is dimly aware of Kasamatsu thrusting in deep and coming, but mostly it’s
lost to the white noise in his head.
Kise collapses onto Kasamatsu’s chest, still panting and feeling totally
boneless, fucked-out and exhausted, and so, so happy.
“Happy birthday, Senpai,” Kise says, and Kasamatsu laughs breathlessly.
“Yeah, it was,” Kasamatsu says, putting his arms around Kise’s shoulders and
holding him there, probably too heavy and too warm.
Soon they’ll have to get up, and Kise will need another shower, and then
they’ll go out for lunch before Kasamatsu walks Kise to the train station and
Kasamatsu will tell Kise not to cry and Kise will cry anyways. Soon, but not
now, and for now Kise is perfectly happy to bury his nose in the crook of
Kasamatsu’s neck and grin.
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