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Published:
2021-12-22
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1,709
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1/1
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Let Unnie do it

Summary:

Chaeryeong needs a little help picking a cup. Lia is more than willing.

Notes:

This is a work of FICTION. It doesn't represent how I view the characters in real life. If you can't separate real life from fiction and this makes you uncomfortable, please click away. 🙏

(See the end of the work for more notes.)

Work Text:

Chaeryeong is incredibly squeamish. So when Lia suggested she use a menstrual cup, her knee-jerk reaction was to back out of the conversation. But Lia told her how much better it is, how freeing it is to wear one and not be held back by your period. She told everyone about it and offered to gift them each the same brand she was using.

While she’s open to trying it, there’s one step that she isn’t quite sure about, though both Lia and the website say that it’s essential to do in order to pick your size. Lia even offered to help her out, and she has to admit it’s kinda nice having someone older and more experienced around for the procedure. Thing is, she just isn’t used to... this.

It isn’t that she’s never touched herself down there . It’s that she’s never touched herself in front of someone else. She makes Lia turn around as she pulls down her underwear and sits on the toilet, even though the whole point is for Lia to see.

Meanwhile, Lia is incredibly matter-of-fact about it, saying, “to measure your cervix you just need to insert a finger, preferably the longest one, the middle, and then keep going until you feel the cervix. Mark it with your thumb and then you can measure how far your finger got.”

Chaeryeong hovers her manicured nail over her clit, milky thighs spread over the toilet seat. “I don’t think this is the best way to do this,” she says. She chuckles a bit but her voice gives away how nervous she is.

Lia hums. “Why? What’s wrong?”

“My nails.”

“Ah, that’s right.”

Chaeryeong visibly relaxes, thinks this is her ticket out. “Yeah, so-“

“Unnie can do it for you,” Lia offers, and kneels in front of her. Chaeryeong can’t even back away.

She squeals and shuts her legs closed. “What are you doing, get up!”

“Your period is in a few days, I want you to be able to use the cup when it comes,” Lia insists. “It’s really so much better to dance in, and you won’t need to take as many bathroom breaks.”

Chaeryeong is still looking down in horror, holding her long hair back. “Y-yeah but...”

“I’ve washed my hands, and I know how to do this better than you. It’ll be super quick.” She says it with so much confidence, and her face looks so trustworthy. They’ve been working together for over two years now, and Lia hasn’t led her astray yet.

“Okay...” Chaeryeong nods.

“Okay... So open up for me?”

Chaeryeong does as she says. She kind of zones out, or maybe zones in, as Lia looks between her legs and presses her pointer finger at the top of her slit. The touch is warm and light, and so... new .

“Not there,” Chaeryeong says. She’s holding the hem of her shirt up to her chest so it doesn’t get in the way.

“I know,” Lia says. “I’m not trying to do anything to you, I’m just going to part it here...” She glides her finger down between her folds. Chaeryeong’s wet for who knows what reason, but Lia doesn’t mention it.

Chaeryeong whimpers, thinking how embarrassing , and bites her lip to shut herself up.

Lia’s fingertip prods at the flesh around her urethra, and then slides down to her hole. It twitches and her eyelids flutter.

“Sorry,” Chaeryeong says.

“No need,” Lia replies quickly. Clinical. The neutral expression Lia has on her face is driving Chaeryeong crazy, she wants to scream so bad but knows she shouldn’t. “I’ll push it in?” Lia looks up with her wide eyes and Chaeryeong blushes even harder. Why’s it so hot?

“Mhm, go on.”

Lia’s eyes monitor her hand and Chaeryeong’s reaction at the same time. “Just breathe.”

She breathes in instantly, realizing she’d been holding it. How could she have forgotten to breathe?

She yelps when she feels it at her entrance, and then all of a sudden it’s inside, just tip, a small intrusion nudging into her so slowly.

“Good?”

Chaeryeong looks down in disbelief and panic. How is she supposed to respond to that?

Lia shakes her head and smiles.

She swears if Lia didn’t have her finger inside her cunt, she’d smack her.

“I mean, is this okay? Not painful.”

“Ah.” Right. Dumb dirty-minded Chaeryeong. “Yeah. It’s okay.”

Lia nods and takes that as a cue to keep going, a little faster this time. She pushes her finger all the way in. Chaeryeong whines at the visual.

“I can’t reach it,” she remarks, her brows furrowed.

“You can’t reach it?” Panic again. Judging by the look on Lia’s face, something must be wrong.

“Let me try something.” She wiggles her finger around, and Chaeryeong’s legs snap shut, almost clamping around Lia’s arm, but thankfully she pulls away.

“Hey!”

“How do you expect me to look for it?”

Chaeryeong gapes at her, and then looks at the finger she’s holding up. It’s glistening. Is she really that wet? What’s that supposed to mean? Does that mean she’s...?

No.

God, this is way too embarrassing, but Chaeryeong doesn’t know what to say.

“Can we try one more time? If we don’t find it it’s okay, it just means that you have a high cervix.”

They stare at each other for a while, Chaeryeong on the verge of tears from how confused and frustrated she is. Lia only wants to help her, though. And this is helping. She wants to manage her periods better sooner rather than later.

When Lia raises her brows questioningly, she groans. “Okay, okay.”

“Okay?” Lia carefully puts a hand on one of her knees to push them apart. Chaeryeong whimpers, but obeys, planting her heels on the floor and throwing her head back to stare at the ceiling. This way, she doesn’t have to see Lia’s face when she puts it back in. But she can hear it all the same, a subtle squelching sound that makes her instinctively cringe. Why is she so wet?

“It’s okay,” Lia reassures her. “That’s normal.”

“Please hurry.”

That was not supposed to sound that breathless, but the words are already out of her mouth. She resigns herself to chewing on her lip as Lia continues.

“Wider, just a bit.” The contact point between her hand and Chaeryeong’s thigh is on fire. Lia isn’t forceful but even the gentle pressure makes Chaeryeong’s stomach flop.

She shakes her head. “Please no.”

“I think I felt it, I just need to get a bit deeper.” How can she be so calm? “I swear I’m almost there.”

Almost there, as if this is a cave exploration and she’s almost gotten to the treasure. God, this is humiliating. But she opens her legs wider all the same.

“Ah, there! Found it,” Lia grins, and Chaeryeong is so incredibly relieved, she bows her head to look and gives a light laugh.

“It’s really there?” She’s so glad. She thought she was broken or something.

“Mhm. It’s firm right now, kinda like how your forehead is firm. You can check for yourself next time you have your nails trimmed.” Lia rubs her knee and smiles her crescent moon smile up at her. “You did really well.”

Chaeryeong squeezes her lips together, eyes wide with shock at how her pussy clenched in response to what Lia said. “Thank you,” is all she can say.

She’s relieved it’s over, she really is. But when Lia pulls her fingers out, she squeaks and her hips follow. She doesn’t say anything. Everything is quiet while she stares at Lia’s matching surprised expression. Her finger is still half way in her cunt, Chaeryeong’s shirt still clutched to her chest to reveal her belly. She’s breathing so hard.

Lia doesn’t say anything either, just recovers from her initial surprise and asks a question with her eyes as she twists her wrist. Chaeryeong has no idea what her own eyes answer, but she pushes back in, making Chaeryeong gasp.

“Unnie—”

Then she does it over, and over again, slow and experimental at first. Chaeryeong can barely process what’s happening, the pleasure so new she has to hold onto her shoulder. She mumbles, “what the hell,” under her breath, arching her back prettily as she lets her unnie’s index finger fuck her pussy. It’s so unfamiliar, and yet so good . She’s never done something like this with someone else, so she doesn’t know what to do, just lets her body react to what she’s being given and tries her best not to be too loud.

The pleasure seems to fade away, and Lia’s movements slow to a stop. When their gazes meet again, Chaeryeong isn’t the only one gasping for breath. And then she’s empty, her wetness dripping onto the seat as Lia takes her hand back. She shuts her legs, alarmed, and watches Lia crack a smile as if none of that happened.

“I reached it but you still have a pretty high cervix. You should get one of the longer cups,” she declares.

“Unnie,” Chaeryeong whispers. Lia looks at her expectantly. And she really wants to say something to acknowledge whatever that was, but she doesn’t know the right thing to say, so she just smiles back at her. “Thank you.”

“No problem,” Lia says, daintily putting a hands on her knee to stand up. “You wash up, I have to shower too.” She rinses her hand and Chaeryeong gets into the shower, closing the shower door behind her. She lets the water run for a full five minutes, just spacing out, trying to remember how it happened, if she heard Lia moan too, or maybe she was imagining things.

Her hand drifts down her belly and to her thigh. She spreads them, like earlier, and licks her lips. Lia’s face flashes in her mind.

This is okay, isn’t it?

She dips a finger in and whines. She’s still so wet. She wants to calls out, “unnie,” and she surprises herself when she does, feeling the embarrassment warm her chest and cheeks. Like she’s getting caught.

But she isn’t. So this is okay.

She does it again, letting the shower mask her noises.

“Unnie.”

This is okay. No harm done if she’s just imagining.

Notes:

Whew~ Very first ITZY fic! Hope you liked ^^ Please leave a comment if you did!! It'd really motivate me to write more and make me super happy.

Also I realized I should’ve talked about the hymen and virginity but maybe we can do that for another member. If I get a lot of comments on this fic I’ll definitely write more. If you have a ship you want to request just let me know!

 

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