Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/8177053.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      F/M
  Fandom:
      名探偵コナン_|_Detective_Conan_|_Case_Closed
  Relationship:
      Kudou_Shinichi/Mouri_Ran_|_Edogawa_Conan/Mouri_Ran
  Character:
      Kudou_Shinichi_|_Edogawa_Conan, Mouri_Ran
  Additional Tags:
      i_still_don't_think_it's_fluffy_enough, it's_exactly_2400_words, how_did
      i_manage_that, can't_believe_I_wrote_this
  Series:
      Part 1 of the_sinran_project
  Stats:
      Published: 2016-10-01 Words: 2338
****** there's a first time for everything ******
by dustofsinnamon
Notes
     So, I'm putting this up for Prompt #3 of the 30-Day OTP Challenge
     (NSFW) on Tumblr. (#03: First Time)
     (And also because there's just. Not enough of these two.)
     Yes, that title was a pun. Yes, it was awful. No, I have no regrets.
She supposed it wasn’t exactly  surprising  that things had moved so quickly.
They had always been close, and really, wasn't this just another way of
expressing that?
She didn't regret anything they'd done, after all.
Pausing in her thoughts to relax into the strong arms holding her close, she
smiled.
She recalled how they had gotten into this position.
She had been in the library of his house when the tiny detective declared that
he was going to visit the professor.
Perhaps an hour later, she had been dusting one of the bookshelves out of
boredom when someone hugged her from behind.
She tensed until, a moment later, she heard his voice.
Until he said the words she had waited so long to hear.
“It's me, Ran. I'm here, I'm home, I'm not going anywhere this time.”
“Shinichi…”
“Yeah?”
She didn't move.
She didn't want to, because what if she was dreaming again and when she woke up
she was still waiting?
So she didn't move.
He placed his hands on her shoulders, turning her to face him.
And then he kissed her.
It wasn't anything like she had imagined it would be.
It was clumsy, awkward and betrayed the fact that he was still adjusting to
being back to his normal size.
But none of that mattered, because he was here and he was  kissing her  and she
wasn’t sure she could comprehend it.
She did the only thing that came to mind - she kissed back, relaxing as his
arms wrapped around her.
She wasn't sure how long they stayed like that, but eventually they stumbled
their way up the stairs to his room.
Their intentions, she recalled, were still mostly innocent at that point.
They talked for a while, skirting around the topic of the kiss, about what they
were going to do now .
Eventually, she found herself sitting in his lap, her head resting against his
shoulder.
One hand played with her hair, while the other held her close to him.
She wasn't aware of the noises she was making until he pointed them out to her.
“Ran, what are you doing?”
“Hm?”
“You keep making weird noises.”
“If it bugs you so much, then stop doing that.”
“It doesn't bother me at all,” he assured her.
She wondered what sort of sounds she could get him to make, before clearing her
head of those thoughts.
Before long, the conversation drifted back to them.
Specifically, to what had transpired between them earlier that afternoon.
“Shinichi…”
“What is it?”
“Why… Why did you kiss me?”
“Why? Did you not like it?”
He shifted to regard her face, looking concerned.
She realized his face was flushed scarlet, and felt the need to reassure him.
“N-no! That's not it, it was f-fine… Actually, I liked it. I was just wondering
why you did it so suddenly…”
“You looked like you were going to cry.”
“Huh?”
“When I saw your face, you looked like you were going to cry. You've cried more
than enough because of me, Ran… So I did the first thing I could think of.”
She wasn't sure what to say to that, so she kissed him again.
He responded instantly, shifting to a more comfortable position for them both.
That first kiss turned into several more, and that was most likely where the
innocent intentions disappeared, replaced by something else.
Something  very  different.
Within moments, he had her pinned to the bed.
They both knew she could move if she wanted, but she made no effort to do so.
Still, he seemed concerned.
“Ran… Is this okay?”
“Yes, it's fine,” she assured him, using the hand in his hair to pull him down
for a kiss.
Before long, soft kisses trailed across her cheek, down along her neck.
She shivered at his gentle touch as he moved her hair to the side, pressing his
lips to her skin.
“There it is again,” he whispered in her ear. “You sound like a cat, purring
like that.”
“Shhh, you're ruining the moment.”
She threaded her fingers through his hair, eventually letting her hand trail
down his neck to his back, stroking along his spine.
She laughed a little at a sudden realization.
“What's so funny?”
“Who sounds like a cat now, Shinichi?”
“...Quiet, you'll ruin the moment.”
She laughed again, but didn't say anything else.
When she felt him nip lightly at her neck, she let out a sound somewhere
between a sigh and a squeak.
He lifted his head and looked at her, seeming concerned.
“It's alright,” she assured him. “You just surprised me…”
“If you're sure it doesn't hurt… The last thing I want to do is hurt you, Ran.”
“I’m sure, Shinichi. It’s fine.”
She pulled him down to kiss her again, and she didn't let go until she
remembered they needed to breathe.
They had, she noticed idly, gotten better at the kisses somewhere in the last
hour or so.
Rather than return to her neck, this time he pressed a soft kiss to the space
above her chest.
She shivered slightly, and nodded as he tugged at her shirt with a questioning
look.
“Are you sure you want to keep going?”
“Yes, Shinichi, I'm sure. I want to do this.”
“I'm going to keep asking, you know.”
“I know. I also know that you'll still be here in the morning, and that's all I
need to know.”
He kissed her again, as he fiddled with the buttons on her shirt, attempting to
undo them.
It took him a little while to get the hang of it, but eventually it was off.
She tugged at his sleeve when he was finished tossing her shirt to the floor,
looking up at him curiously.
He nodded. “Go ahead.”
This time it was her turn to struggle through undoing the buttons, and she
accidentally tore a few in the process.
“I'm sorry…”
“It's fine. This shirt was getting too old, anyway.”
She threw it to the floor, where it joined her own.
He kissed her shoulder and lifted her into his lap again, his fingers fiddling
with the clasp on her back.
“Ran…?”
“Keep going.”
Immediately he undid the hooks of her bra, allowing it to join the quickly
expanding pile of clothes on the floor.
He held her close against him, and in that moment, with their chests pressed
together, everything seemed so much more real.
“I love you,” he whispered softly.
“Why say that all of a sudden?”
“I just… I hadn't realized, I hadn't told you that yet, and we’re here and
we’re doing this...”
“I love you, too,” she whispered in response, because really, what else could
she say to something like that?
She let him pin her down once again, as he kissed her for perhaps the
thousandth time.
He kissed along her skin, trailing his tongue over one of her breasts, as one
hand gently stroked the other.
His touches were feather-light and teasing, until he felt her hand press his
head down against her slightly with an impatient sound.
He slowly took her nipple into his mouth and began sucking on her skin, careful
not to hurt her.
At the same time, his hand continued the same feather-light teasing touches.
After some time, he switched breasts, and continued the same light touches and
teasing kisses, until she grew impatient once again.
When his lips trailed down her stomach, she shifted and flipped them over.
“I want to try something,” she said quietly.
“Alright, go ahead,” he nodded, leaning back. “I'm all yours, Ran. Do what you
like.”
She began by pressing a deep kiss to his lips, before moving down to his neck.
She sucked and licked at his skin, pleased with the soft whine she received
when she bit lightly.
“Is this alright?”
“Yeah, that's fine.”
She continued for a little while, before slowly trailing her lips to his chest
in the same pattern.
He let out a surprised sound when her teeth found one of his nipples.
“Did that hurt?”
“Not really, just unexpected…”
She continued in the same manner with the second.
She trailed down his stomach as well, tugging at his pant leg.
“May I?”
He nodded in response.
She was deliberately slow as she removed his pants, purposefully trailing her
hands a little lower than was necessary.
When she was finally finished, she pressed a long, slow kiss to his lips after
trailing her way back.
“Was that okay, Shinichi?”
“Yeah, it felt kind of nice. Can I do something now, though?”
“Go ahead.”
He pulled her into his arms, moving so her back was pressed against his chest
and she was seated in his lap.
His hands cupped her breasts, and he squeezed them gently, rubbing circles into
her skin.
“How's that, Ran?”
The response he received was a quiet moan.
Moments later, his hand trailed lower, brushing against her skirt.
“You sure you want to keep going?”
“Mhm.”
She didn't trust her voice to form words in that moment.
Gently, he removed her skirt, somehow keeping her in his lap.
Trailing his fingers up her leg, he paused at the last piece of fabric.
Slowly, he rested the palm of his hand between her legs.
“One hundred percent?”
His concern was touching, really, but she was getting just the tiniest bit
frustrated.
“Yes.”
Carefully removing her panties, he pressed a kiss to her shoulder.
After her last article of clothing hit the floor, he looked over her shoulder.
“You're beautiful,” he said softly.
She felt her face flush.
“You’re still sure you want to do this?”
“Mhmm,” the ability to speak properly had abandoned her again.
One of his hands rested on her leg, while the other slowly pressed between her
legs.
Slowly rubbing in circles, he seemed slightly uncertain at first.
She whined a little when he moved his hand away, and she noticed he seemed more
sure of himself after that.
He slipped a single finger inside of her, and she let out a surprised sound
between a squeak and a moan.
“Is that okay?”
She nodded, making that sound once again as he started moving the finger inside
her.
Sliding it in and out and curling it inside her and moving in circles and all
sorts of other things that she had no words for.
After a couple minutes of experimenting, he slid a second in with the first.
Another very similar period of experimenting followed.
“Are you okay, Ran?”
He squeezed her leg with his free hand.
“Y-yes,” she practically squeaked. “Don't stop that…”
He didn't stop until she gripped his wrist.
“C-can I do something?”
“Go right ahead,” he assured her.
Carefully, she slid off his lap and tugged at the elastic waistband of his
underwear.
She gave him a questioning look. “Shinichi… Are  you  sure you want to do
this?”
“I wouldn't have let it get this far if I wasn't sure, Ran.”
Nodding at his answer, she removed the last article of clothing between them,
tossing it aside.
She didn't realize she'd been staring until he spoke.
“Ran?”
“A-ah, I'm sorry, Shinichi…”
“No, it's alright. I was just wondering if you were okay, all zoned-out like
that…”
“I'm fine, I just got distracted.”
“Oh?”
“Yeah…”
She felt her face flush.
“It's okay to be nervous, you know? It's not like this is something either of
us has any experience with…”
*You mean you never…?”
“Ran. I've been in love with you since we were kids, and in addition I have
spent the last few months in the body of an elementary school student. Who on
earth would I have had sex with?”
“I guess that's true…”
“I'm a little nervous, too. I'm afraid I'll hurt you or do something…”
“Shinichi, it will be fine,” she told him simply, lying back on the bed.
“How can you be so sure?”
“I trust you,” she said simply, as if that was the only thing that mattered.
As far as she was concerned, it was.
He moved on top of her, kissing her softly.
As the kiss deepened, she felt him pressed completely against her.
Before long, she broke the kiss.
Her hand slid low and she took hold of him gently.
“You sure?” he asked one last time.
“Would I still be here if I wasn't?”
 That seemed to be answer enough to calm him for the moment.
She guided him into her, slowly, and let go.
“I don't want to hurt you…”
“It's okay, Shinichi.”
He kissed her as he pushed further.
She gasped into the kiss, feeling herself stretching beneath him.
He broke the kiss when he was fully inside of her, looking at her with concern.
“Ran…”
“It doesn't hurt, Shinichi,” she assured him. ”It's a little uncomfortable, but
that's fading already…”
“You're sure?”
“Mhm.”
“Okay.”
Slowly, he began to move inside her.
Eventually they found a sort of rhythm in their movements.
Before too long, however, they found that it was over.
“Ran, I-”
She cut him off with a rough, passionate kiss, which he returned in equal
measure.
She felt him thrust one last time, before collapsing on top of her.
He didn't move until she was no longer writhing underneath him.
After slowly withdrawing himself from her, he looked at her.
“How was it, Ran?”
She flushed. “It was nice, Shinichi.”
“And you're okay still?”
“Yes, I'm fine,” she murmured. “Just tired now.”
“Yeah, so am I.”
He pulled her close, holding her to him.
She moved closer, tucking her head underneath his.
“Shinichi…”
“What is it?”
“Did you like it? You asked me, but you didn't say how you felt…”
“Yes, I did.”
A few minutes of comfortable silence passed between them.
“I love you.”
“I love you, too.”
Sometime after that, they must have drifted off to sleep, as the next thing she
was aware of was waking up in the same position.
 She closed her eyes once again, not feeling any particular desire to move from
this position.
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