"Hey, Miku."
"What…?"
Today, only Miku had come over to hang out at my place. Right now, she was lying down with her head on my thigh, reading a history book.
Miku and her sisters were already first-year high school students. They had grown quite a bit, and their chests had gotten so large that it was obvious even through their clothes.
Well, she wasn't on Rena's level yet, though.
This Miku always wore her headphones around her neck, and her hair was cut to about shoulder-length. For some reason, she'd grown out her bangs to cover her right eye.
"Just so you know, I am a guy, you know. Aren't you being a little too defenseless?"
"You're Onii-chan. It's fine. Or… did I… get you… all worked up…?"
Miku asked, hiding half her face behind her book.
"There isn't a guy alive who wouldn't get worked up looking at you Quintuplets."
"Really!? Then, Onii-chan, you're getting worked up for me?"
At my words, Miku sat up, looking at me happily.
"Why are you happy about that? That's where you should be feeling a sense of danger."
"I… well… if it's Onii-chan… it's okay… even if you take me…?"
'Please don't say things like that while looking up at me like that.' Lately, it's been really hard for Yoshida to keep his rationality in check.
"Don't say things like that so easily. You girls are precious girls entrusted to me by Rena-san."
"It's not easy…! I'm serious…!"
Looking straight into my eyes, Miku conveyed her feelings.
"I've said it before. That I love Onii-chan…"
"Th-that's…"
"I know Onii-chan loves Mom too."
"!"
"I might still be no match for Mom, but I'll become even prettier…!"
Miku showed a slightly smiling, determined expression.
'That's not true, Miku~!! You girls are all becoming wonderful women.' That's why it's a problem. Because the monster of desire inside Yoshida might attack them all at any time.
"Miku. Come here."
I spread my arms wide, inviting Miku in.
"Onii-chan…?"
"I'll hold you like I used to."
"Yeah…!"
I held Miku tightly as she leaped into my chest.
"Onii-chan is so warm…"
"You are too, Miku. Warm, and you smell nice."
I placed my hands on both of Miku's shoulders and faced her. Then, Miku closed her eyes as if offering her lips.
'I'm sorry, Rena-san.'
"Mm... smooch..."
I lightly kissed Miku's lips and pulled my face away. Miku was crying with a smile.
"Fufufu… why do tears come out even when you're happy? Onii-chan… I love you… Mm... smooch... smooch... smooch... hah…"
Since Miku kissed me, I responded. Since it was still our first time, there was a bit of awkwardness. That part of her was unbearably adorable.
"Miku… slurp..."
"Mmph!? Mmh... licking... slurp... hah... lick lick... smooch... O-nii-chaaa… n... lick lick... slurp... hah..."
When Yoshida finished kissing and looked at Miku, she had a dazed expression.
"How was it? A grown-up kiss?"
"It was amazing… hey… let's do more…?"
"Yeah. Sure."
I took off Miku's uniform, leaving her in just her underwear. I was also just in my boxers, bare-chested.
Gently, I picked Miku up and laid her down on the bed.
"Onii-chan… I love you…"
"Thank you, Miku… mm…"
"Smooch... slurp... hah... lick lick... slurp... Mmmh, smooch... ah... ahNnh"
After finishing the kiss with Miku, I kissed her neck while fondling her breasts, gradually moving downwards.
"Mmh... ah... Mmmh..."
"Miku's breasts are so soft and feel so good."
"Really? Onii-chan, do you like my boobs?"
"Yeah…"
I was fondling them with both hands, but they were spilling over my palms. That's how much these girls had grown.
"Ah… Mmmh… that feels so gooood… ah... ahNnh..."
"Your voice is cute too… smooch… I'll take this off, okay?"
I kissed her lips lightly and told her I'd take off her bra. She nodded while hiding her face with both hands.
"Such pretty nipples. Nom…"
"Hyah…! That's…"
As I licked and sucked her nipple with my tongue, making wet sounds, sweet voices came back from Miku.
"Ah... ahNnh... that's... it feels so gooood... nooo... ah... something's… coming..."
It seemed she was about to cum just from her breasts. So, while I used my fingers to pinch and roll her other free nipple,
"Hyah... nooo... ah ahNnh... my head's… going blank~!!!"
"It's okay. Just let go…"
I told her to cum just like that while licking her nipple.
"No way... O-nii-chaaa… n... O-nii-chaaa… n... I'm cumming… I'm cummiing—!"
In that instant, Miku arched her back and trembled.
"You came, Miku."
"Cu… mming…? This is…? Hah…"
I stroked the head of the dazed Miku and told her she'd climaxed. Looking at Miku's panties, I saw they were already stained.
"I'll take these off too so they don't get dirty."
"Huh...…? Ah, wait, wait…!"
Miku had been dazed but seemed to understand the situation and tried to stop me from taking her panties off, but it was too late. I had already slid them down, and Miku's pussy was laid bare before my eyes.
"Uu… it's embarrassing…"
"Heh, you've even grown hair properly."
"Don't say thaaat…!"
I kissed Miku as an apology.
"Mm... smooch... slurp... hah... lick lick... slurp... Mmmh…!?"
While she was distracted by the kiss, I began tracing her slit with my finger.
"Mmmh... smooch... stahp... wait... Mmmh... slurp…"
I blocked Miku's words with a kiss while continuing to stroke her slit.
Well, it's about time.
There, I touched my finger to the little bean slightly above her slit.
"Nnah... ah... ah... ah..."
It seemed she came lightly again. I didn't mind and continued moving my fingers.
"Stahp... ah... nooo... enough... really... nooo...!"
It seemed she was cumming so much she couldn't even form words properly.
'Maybe the next one will be the last today.' Thinking that, Yoshida inserted his finger into her vaginal cavity.
"Fuwaaaaaaah…!"
'Whoa! Her inner walls are super slick!' He inserted up to about the second knuckle and touched here and there along her vaginal walls.
"Ah... ah... Mmmh…!"
'Hmm… so this is Miku's spot.' He applied pressure to the spot he found on Miku. And for good measure, he took her nipple into his mouth.
"Ah… ah… ah… nooo… no nooo... it's different… from before… Aaaaah—!"
"It's okay. Cum!"
"No way… no way… no no way… I can't... this… I caaaan'ttttt—!"
Splash… Splurt splurt…
The next moment, Miku arched her hips and squirted with tremendous force.
'Wow… even Rena-san doesn't squirt this much. Maybe Miku has a talent for this sort of thing.'
"Sob… sob…" While Yoshida was admiring that, Miku suddenly started crying.
"Wh-what's wrong!? Miku!? Did it hurt somewhere?"
"Hic… no… it felt really good… but… I peed myself…"
"Peed? Ah… that wasn't peeing."
"Really…?"
When I smiled and stroked Miku's head, she seemed to recover a little.
"Yeah. Girls, you know, when they feel really good, that's how it comes out. As a guy, I couldn't be happier. Slurrp…"
To reassure her, I stroked her head and kissed Miku's lips.
"Smooch... so, Onii-chan is happy…?"
"Yeah. I'm happy that Miku felt good. Thank you, Miku."
When I hugged the lying Miku, she hugged me back.
"How was it?"
I pressed my forehead against Miku's and asked for her thoughts.
"Um… it felt really, really good…"
"I see, I see… But let's stop here for today. I'm more worried about your body, Miku."
"Yeah… okay... will you do it with me again…?"
I kissed Miku in response to her request.
"Smooch... Yeah. When we're alone together like today. It's a secret from the other sisters, okay?"
"Huh? You won't do it with everyone?"
When I told her to keep it a secret from the Quintuplets, I got an unexpected reply.
"Huh? Everyone?"
"Yeah…! Everyone… because we share everything equally, the five of us… We have to share this pleasure too…"
'It's come to this… hmm…'
"Even so. If they come to me bravely to ask like you did, Miku, I'll do it with them."
"Was I… brave?"
"Yeah. It was a very brave act. You're amazing, Miku."
"I see… ehehe… yeah, okay… I'll keep it a secret from everyone…"
"Yeah. For being such a good girl, here's your reward."
"Mm... smooch... slurp... hah... Mmmh, smooch... lick lick... slurp... hah... Onii-chan, I loooove you…!"
"Mmph…"
In the end, Yoshida's head was pressed against Miku's chest as she hugged him tightly.
...
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