Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/2655194.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M
  Fandom:
      Katekyou_Hitman_Reborn!
  Relationship:
      Sawada_Tsunayoshi/Yamamoto_Takeshi
  Character:
      Sawada_Tsunayoshi, Yamamoto_Takeshi
  Additional Tags:
      First_Time_Blow_Jobs, Awkward_First_Times, Friends_With_Benefits,
      Katekyou_Hitman_Reborn!_Kink_Meme, Fluff
  Stats:
      Published: 2014-11-22 Words: 1708
****** Getting Used To the Idea ******
by blueberry
Summary
     Tsuna can't even talk properly about sex without starting to die of
     embarrassment. That's okay. Yamamoto thinks it would work better
     anyway to just have some.
Notes
     Request: "Yamamoto/Tsuna, and there are not NEARLY enough blowjobs in
     this meme" -- was what I started writing it for, but since I took
     ages finishing it, I ended up completing and posting it for basically
     the same request here.
      
It was one thing to say they'd do homework together, but with Gokudera begging
off to do dynamite maintenance, it ended up being fifteen minutes of staring at
incomprehensible pieces of paper and then shoving them aside. None of it was
due for the next day, anyway.

Tsuna lay on the floor, and Yamamoto leaned with folded arms over the low table
on which they should have been working. They talked about nothing much,
comfortable, until Tsuna choked on his own tongue as he tried to give a reply.

"I did that too," said Yamamoto. "Think I should've said yes instead?"

"No!" said Tsuna, and blushed. That was probably not a manly opinion. "It's
weird," he tried to explain himself. "She's not even in our class, so she
doesn't really know you - and anyway, you can't try to change someone's mind
about dating you by offering to ... do that!"

"For one thing, I still wouldn't have time for dating," Yamamoto said. "And
yeah, it's kind of weird."

Tsuna turned over the story in his mind, boggling. "It'd be embarrassing, too.
If you're going to do stuff like that, wouldn't it be better with someone you
know?"

Yamamoto nodded agreeably. "More comfortable. Although it'd be okay if it was a
stranger, and both of you agreed it was a once-off thing. That would be hot."

"Jeez," Tsuna muttered. Maybe it was hot to think of, but that kind of thing
would never happen to him, and anyway - "I think I'd still die of
embarrassment."

Yamamoto laughed. "It would be too fun for that."

Tsuna stared at the ceiling as his cheeks got hotter, and realised that he
couldn't even about it.

Yamamoto's face popped into his line of sight. "It's that bad?"

"Yamamoto," Tsuna said in general protest, and turned his head away to look at
the wall. He expected to get laughed at some more, but Yamamoto fell silent, so
he looked back, and Yamamoto had a thoughtful expression on his face. "What?"

Yamamoto sat back, leaning an elbow on the table and gesturing with his free
hand in a slightly awkward way. Not nearly awkward enough, as it turned out.
"Well... It doesn't have to be that embarrassing. We could ... get each other
used to the idea."

Tsuna tried to fight off knowing what he meant, but it was too much, and he
croaked, "Of blowjobs?"

"I can give it a shot." Yamamoto looked speculative - and then looked
speculatively at him, eyes going downwards and then up in a way that made
Tsuna's mouth dry out. "We'll work it out together. Tell me what feels good,
okay? Then I'll tell you." He got up and moved around the table to straddle
Tsuna, grinning like it was no big deal - almost the same as he did before
baseball matches, or when he was going into a big fight. Tsuna would have asked
if he was serious, but his expression was an answer on its own.

"You really don't have to be so worried," said Yamamoto. Like he'd said, he
looked a little embarrassed, but too excited to let it bother him. "Hey, you
wanna sit on the bed instead? It'd be easier than bending over like this."

Tsuna wished he hadn't said that. It made him think how instead of what the
hell and it was having a bad effect. He propped himself up on his elbows and
Yamamoto didn't move. They faced each other from inches away and Tsuna
whispered, "Are you sure?"

Yamamoto grinned. "Why wouldn't I be?"

So Tsuna ended up sitting on his bed, Yamamoto fiddling with his fly, and
wondered if he'd pass out from nerves. Then there was a hand at the opening of
his boxers, drawing him out, and Tsuna felt the crippling certainty that
Yamamoto would burst out laughing - which was dumb because they'd already seen
each other naked when they changed during swimming classes in PE, but—

"Um, I don't feel like getting started from scratch," said Yamamoto, getting up
and sitting beside him. "Is it okay if I..." His hand slid between Tsuna's
legs. Tsuna couldn't say anything, and just twitched his knees so his legs
spread a little more.

Yamamoto's hand was big, warm, and a little rough. Amazingly unfamiliar. Their
nearness became much more obvious, every twanging nerve in Tsuna's body telling
him all about Yamamoto: close, warm, bigger, broader, with breathing getting a
little louder and a faint smell of sweat and deodorant. Tsuna leaned into him
and spread his legs wider for more of the firm, steady touch.

"That's enough," he said, meaning that Yamamoto didn't have to do anything
else, but Yamamoto breathed, "Yeah," slid off the bed, and knelt in front of
him.

One hand wrapped around the base of Tsuna's cock, and then - Tsuna couldn't
look as Yamamoto's mouth approached the tip, and his gaze slammed back to the
ceiling. Maybe the split second's uncertainty between the sight and the touch
was what made him moan so loudly; the sound sprang out of the bottom of his
throat, shocked and adoring.

At first the sensation was pure wetness and heat, and then Yamamoto slipped
over the loose skin of the head of his cock and started sucking like he was
having a lollipop, and Tsuna would have laughed if the feeling didn't slam into
him like something solid. Yamamoto's tongue and hand moved, eager, fluttering
and squeezing and everything at once, finding sensitive spots and sliding away
from them too quickly for Tsuna to speak. He clenched his duvet and tried not
to thrust. It was hard to remember as the ceiling swam in and out of his sight,
as if he was forgetting to see as he felt.

Awareness came back full force at the tightness building below his belly, and
he realised what was happening. He tried to warn Yamamoto, but the name was
stuttered and strangled. Yamamoto made a satisfied, amused sound on him - it
jerked Tsuna out of control and deeper into Yamamoto's mouth, coming so hard
that sight and sense whited out again.

And then:

"I'm so sorry," Tsuna told the ceiling.

"Hey, it's okay." Yamamoto put a hand on Tsuna's head and tousled his hair
vigorously, and when he looked down he saw Yamamoto smiling. "Tasted weird, but
it wasn't that bad. I kind of ... got stuck because I didn't want to get any on
my face, once you started..." He blushed. "I'll warn you in time." He got up
and sat on the bed, grinning expectantly, his legs wide open.

"Right," Tsuna muttered as he fastened his trousers, and forced down his nerves
long enough to undo Yamamoto's. "I guess I'll have to - oh." There was no need
to get Yamamoto started.

"You make these really cute noises," Yamamoto said, by way of explanation.

Tsuna started talking, realised that everything he could say sounded dumb, and
got onto his knees before he exploded of embarrassment.

Yamamoto sighed like he didn't want any air left inside him when Tsuna's lips
touched him and then rounded and tightened to fit his shape. "Um. Yeah," he
said. "Just ... careful, 'cause your teeth will scrape your lips if you move
too hard. And ... don't go too deep, or ... and..." Yamamoto let out another
deep breath, and Tsuna thought he couldn't be doing too badly.

Yamamoto's fingertips trailed across his cheeks, feeling the way they were
hollowed with sucking, and then slipped to his lips and the way they moved up
and down, spit-slick, on him. "Oh," he said, like he'd realised something. "Oh,
fffuck."

Tsuna felt his cheeks burn and ignored it as best he could. He took one hand
off Yamamoto's hips and touched where his mouth couldn't reach, and it was a
while before Yamamoto could speak again.

"Okay, okay, careful ... it's going to come out." Tsuna closed his eyes
briefly, then bent forwards to find an angle where he wouldn't choke. Yamamoto
had done it for him, and it was only fair to do it back.

Yamamoto's hips quivered, and then - wetness, salt and hot and bitter in his
mouth. "Hey," said Yamamoto in protest, but his fingers felt Tsuna staying
where he was, dipped to his throat to feel him swallowing, and Yamamoto groaned
deeply enough for Tsuna to feel it buzz under his skin. He came thickly, and
when Tsuna pulled back he had to wipe trickles of it from the corners of his
mouth.

At least Yamamoto didn't see. He fell back onto Tsuna's bed, flopping over like
a dazed rag doll.

"Nice catch," he sighed.

Tsuna kneeled for a second longer, disbelieving, and then stood up and stared.
Their eyes met. Then Yamamoto blinked, and burst out laughing. "I don't know
why I said - oh, jeez." He put a hand over his face.

Tsuna laughed too. He looked away, still snickering as Yamamoto tucked himself
back and wondered what the etiquette was in this situation. He was a little
sticky and wanted to clean up, but should he leave the room and let Yamamoto
have first go at the tissues, as a guest? Or they could do it together, since
they'd already...

A hand clamped around his wrist and tugged him onto the bed. "Huh?" he said,
steadying himself with one hand, and Yamamoto pulled him down with an arm
around his waist and wrestled him into a hug.

"I guess you're right. It is better with someone you know," Yamamoto said,
snickering again. "A lot less embarrassing." He fell quiet, but stayed wrapped
around Tsuna like a blanket.

"Yamamoto?" Tsuna said. "Do you just want to lie here?"

"Mmm." It was a yes kind of sound, and a little sleepy. Then Yamamoto looked
more awake, and moved back to look at him. "You don't mind, do you?"

He shrugged, and Yamamoto settled back with his head facing into Tsuna's neck,
his breath warm little puffs.

"Tsuna," he said for no reason, merely as if describing a situation that he was
happy with.

It wasn't what Tsuna had tentatively suspected he would imagine his first time
to be like. The fluttering in his stomach eased and he relaxed, letting his
head rest against Yamamoto's, and he didn't mind at all.
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