My cock, which had regained its hardness at my little sister's command, was throbbing and pulsating in the quiet living room in the middle of the day.
The young girls watched with innocent eyes as my partner twitched in sync with my heartbeat.
I don't know if I can call Miyu innocent though.
"It's getting big again..."
Sachiko was observing my erection curiously.
As a man myself, it's a complete mystery as to how certain parts of my body get bigger when I'm excited.
Sachiko doesn't even understand health and physical education.
"Onii-chan is working hard to have sex with Sachiko. I have to praise you for such great efforts."
"That's right. It looks like it's going to be difficult."
Sachiko walks on all fours and approaches my lap.
The glans, reddened by blood congestion, became more sensitive again. It appeared to have lost its sexual sensation after ejaculation, becoming only overly sensitive instead.
"There, there. Good job."
Sachiko's hand stroked my cock.
With such a pure heart.
Taking pity on it.
"Ah... guh...!"
My hips jumped.
Perhaps because of this gentleness, even though her palm was rubbing my glans just after I had ejaculated, I was back in a state of pleasure.
“Is it better to rub than to squeeze it?”
Sachiko strokes not only the tip but also the entire length from the rod to the balls with a feather touch.
Because of her lack of knowledge, Sachiko didn't oppose any of the sexual skills she absorbed from Miyu like a sponge.
From stroking my cock to licking my balls, kissing it and giving it a handjob, she smoothly performs everything.
Since her reference is an erotic video aimed towards men, she reproduces the foreplay that men would enjoy.
Moreover, the expression on her face was a slightly reddened as if she was in love.
She takes my penis in as she uses the submissive expression that Miyu taught her.
"Fumu.... chuu... fuheeling ghood...?"
"Aah... I wish I could stay like this forever..."
"Nfufu. Ngu... guchu...nku..."
She shoves it deep inside after putting it in.
Her mouth is filled with saliva, and it completely covered the glans all the way to the base.
I can't believe this is the technique of a girl who doesn't even know what sex is.
It was an incredible feat.
"Aah... Sachiko... again... in your mouth...!"
"Nnh...!"
Forgetting the purpose of having sex, I just asked Sachiko to ejaculate in her mouth again, causing Sachiko to stop moving.
Her face stiffens, and it seems that the semen that was released into her mouth earlier has caused her some trauma.
If I keep ejaculating in her mouth, she will start hating blowjobs.
Sensing such anxiety, Miyu approached Sachiko from behind, pulled down her pants, and slipped her hand into her crack.
"Sachiko needs to get ready soon too."
"Huh... nkyu...!?"
Sachiko flinched and cringed as Miyu's arms began to slowly move back and forth.
"Ah... hauh... aahnn... ah......!"
"Don't let it go from your mouth. Keep it in."
"Fuu-... nggh...! Nn! Huff... nchu...!"
Sachiko's blowjob became more intense as Miyu's hands played with her private parts.
She was intently sucking my dick, trying to somehow push the pleasure Miyu was giving her out of her thoughts.
What was there was not an acting submissive face or anything like that.
She was at the mercy of Miyu's fingers while holding my cock in her mouth, with such a dejected expression that she couldn't even put any strength into her facial muscles.
"Sachiko... if you do it so intensely... I can't keep it...!"
"Haah... mguh...... nnnh... nn... nnnnNN~~AAHhh! Miyu... cha...n...aaarr....nn-...!"
Sachiko's secret place was overflowing to the point where it made clicking sounds.
Maybe Miyu was doing it on purpose to get us all excited.
Sachiko's moans and breaths are so disorganized that they seem devoid of reason, and it's as if she can't even hear me anymore.
From what it looked like, it was already clear.
Sachiko has already been teased inside her vagina by Miyu.
"Miyu... scha... Miyuuu.... ah....... co-... co-... mninnhh... gg....... nnkuhnnn...!"
Sachiko sucks my cock while suffering from the pleasure Miyu gives to her private parts.
Miyu was probably loosening Sachiko's vagina forcefully to prepare for sex.
Sachiko seems to have some experience with masturbation, and I can see that she has a certain level of sensitivity.
The matter is that Miyu's finger movements are too good.
Unless she's used to playing with a woman's body, it would be impossible to lead her into this hell of pleasure.
Does Miyu actually masturbate after all?
I find it hard to believe that this normally grumpy girl has concerns about not knowing what to do with her youthful body.
She would moan like Sachiko and release her sexual desire.
If such a Miyu exists, I would like to see it.
In what positions does she masturbate in?
What kind of voice does she make when she loses control of herself?
"Miyu-hyan... sytop... it...!!"
"Are you going to cum? It's okay. Girls can cum as many times as they like."
"Aaah, Miyu’s fingers, fyehels soo good… nn… aaaah… aAHhhya, aaAHH! S-sthop, it, alread--!!"
Sachiko twitched up and down.
She put all the strength she had into the hand gripping my waist, desperately trying to restrain her uncontrollable body.
"It’s your first time, so let’s get you a little wet."
"Can you give it u- ah, ah, i-sto-, nn, nnn... nnaah! Ahya-, plea...!"
"I haven't touched that nice part of you yet. Here you go."
"Ah, aah, ashmaz-, amashinggg! Nn, aah, aaaaahhh!!"
She was practically screaming.
My cock still in her mouth's way, she expresses from the back of her throat on it.
Miyu's fingers were hidden behind her skirt, but they seemed to be hitting Sachiko's sweet spot perfectly.
"Yeah. Looks good."
"ah... aah... Miyu-hyama... how much was good enough for you..."
"Don't be so exhausted. The real thing is next."
Sachiko's consciousness was in a haze.
Her exhausted face shows half the whites of her eyes, and if this were to be rendered in 2D, it would definitely be depicted as an ahegao.
"Onii-chan is also ready, right?"
Miyu ignores Sachiko, who is barely breathing.
It's like she's just doing what she has to do to fulfill her mission of making me have sex.
I'm ready when you are.
In fact, I'm worried that I'm so ready that I ejaculate the moment I insert it.
I can't shake the nervousness off at the thought of inserting myself into Sachiko, but now that I've come this far, I have no choice but to do it.
"I-I've made up my mind."
It would be rude if I backed down here.
I want Sachiko.
I want to graduate as a virgin in Sachiko.
"I'll get you some rubber, so tell me where it is."
When Miyu said that, my head instantly became cold.
"Ah... Sorry. I didn't prepare that."
I've been trying to get Miyu to work hard for me in the name of sex, but I never thought it would happen this quickly.
"Don't you have one? Don't you use it even when you're alone?"
"I don't."
I don't remember ever using it when I was masturbating in front of Miyu.
Rather, why do you think I have such a thing as a virgin?
“When you use that squishy hole thing, don’t you wear rubber?”
By squishy hole, she means my onahole.
For now, let's leave aside the question of why Miyu knows that I have an onahole.
Did Miyu have such preconceptions as well?
"Because I'm the type that doesn't use it."
"Hmm... what should I do... I don't know where they sell it either..."
Miyu has never had a boyfriend.
Just knowing about condoms is surprising.
...Isn't that part of health and physical education?
"Do you want me to buy it now?"
I haven't seen it before, but it seems to be sold at convenience stores.
"In such a state?"
Miyu taps my penis with her pointing stick.
I feel like I'm turning into a masochist so please stop.
"Sorry..."
"Haah~. It can't be helped."
Miyu sighed loudly and went upstairs.
By that time, Sachiko had calmed down, and we finally met each other's eyes.
"Umm... I'm going to insert it in later. Are you sure you want to do it?"
"It's fine? Is Onii-san also okay with it?"
"For me, well. It's like my wishes are coming true."
Being asked by a younger girl to lose my virginity.
I've never been so fortunate as a man.
"In that case, shall we just go ahead without thinking too deeply about it? ...Should I lick it until Miyu comes?"
"U-uh huh."
Due to Sachiko's aggressiveness, she licks my cock again.
I couldn't ask for it myself.
I'm sorry for all the help you've given me.
"If I do it too much, it'll come out, right?"
"Ah... kuh... haah, aah, that's... right."
Sachiko also obediently listened to my reaction.
Basically, she just licks it, and if there's enough time, she will take the tip in her mouth.
How do I say it, she's already an angel.
"Hmm... chu... muryu... haah... ah-... haan..."
"Sachiko... it feels so good..."
"Nfu... that's a relief... ah-muu... churuu..."
Sachiko takes a break and licks it over and over again.
While doing so, Miyu came down the stairs.
"Alright, use this."
It was handed to me by Miyu.
A circular object wrapped in square vinyl.
There was no doubt about it. It was a condom.
Why does Miyu have something like this?
Sachiko took the condom from my bewildered hand.
"Ah, I know about this."
Sachiko holds it up to the ceiling to see what's on the other side.
Wait, wait.
You guys are virgins, aren't you?
How do you know about condoms that I've never even touched?
"This is the same one I saw when I went to Haruka-chan’s room--fuuguh!?"
"Sachiko, don't say anything unnecessary."
Miyu blocked Sachiko's mouth.
Haruka is definitely a lesbian girl, isn't she.
Why do lesbians need condoms?
I don't know what's going on anymore.
"Onii-chan, put it on quickly."
"O-okay."
The square vinyl package was easy to tear open with my fingers.
From inside, I take out a piece of rubber soaked in lubricant.
It curls up from the base, and the bulge at the tip is the semen reservoir.
I guess all I have to do is attach this to my stuff, which is getting hard.
"Onii-chan, it's the opposite way. It should be oriented so that you can pull the rounded one down."
"I-I see. My bad."
I wonder if there's a brother in this world whose virgin little sister lectures him on how to put on a condom.
Sachiko also watches me intently as I put on the rubber, and since it's embarrassing, I quickly put it on.
"...!"
The rubber had a unique tightening.
It feels like my entire rod is being squeezed, which is different from having it in a mouth.
This is a frustrating stimulus.
If I hadn't experienced Sachiko's blowjob, I might have came just from the tightness of the rubber.
"Sachiko, straddle Onii-chan's lap."
"Y-yes... I understand..."
As expected, Sachiko couldn't help but resist.
Perhaps it was from embarrassment or fear of losing her virginity, but Sachiko's face was stiff with tension as she positioned her wet meat hole on top of my dick.
"A-are you okay?"
"Uuuu... I'm... I'm fine..."
While we were both confused.
Sachiko slowly sat down.
I grabbed it with both hands and first put the tip against the crack.
I tried pushing in a little bit, but it didn't feel like there was a hole there.
Wait, wait just a minute.
Where is it?
I don't know where the hole is.
Even though I wanted to insert it more smoothly.
Is there really a hole?
"I-it's a little more behind..."
"Ahh, m-my bad!"
I made you say it.
I don't want to show that I'm in a hurry, but my head is getting confused.
I have to do something.
If I took too long, Sachiko would dry up.
Behind, behind...
It, it isn't there.
Just the feeling of slimy flesh.
This, in its own way, is pleasant but...
It's not just a matter of feeling sorry for Sachiko.
"Um, more behind..."
"Eh? T-this...?"
My glans sank into a hollow place.
It seems like I can insert it if I push it in.
However.
"Isn't this your butthole?"
"N-No, that's not it. That's where it goes."
"Really? Well, then, I'll insert it."
"Uu... nh... ah......!"
Once gripped up to the crown, it didn't take long before insertion.
Wrapped in a much hotter body temperature than felt on the surface of the skin, my cock trembled in Sachiko's vagina.
"S... shit... Sachiko, you're so hot...!"
"N-ah, it's in...!"
Before I knew it, I graduated from virginity.
I had no time to be deeply moved by this kind of thing.
Finally, my cock entered Sachiko's vagina all the way to the base.
Miyu is watching every part of it.
"Doesn't it... hurt...?"
"Eh, well, that's right. It hurts... but not so much..."
"I-is that so. That's good."
Because Miyu loosened her up a lot.
Usually for the first time, you can't just get into each other like this so easily.
Sachiko covers my body, and due to the difference in size, her breasts are right in front of me.
If we were lovers, I guess she wouldn't get mad if I licked her breasts.
I have an irregular relationship with Sachiko, so maybe I should avoid undressing her here.
The part where we join isn't visible due to her skirt.
I inserted it without knowing what a woman's body was like.
I want to see it, but I wonder if Sachiko is embarrassed.
Since it was my first time, I wanted to see for myself that we were connected.
"Nnh...!"
As I slowly moved my hips, Sachiko lightly lifted hers.
Then, she lowers her hips again and takes my penis deep inside her vagina.
"Does Sachiko feel good...?"
Sachiko and I did not make eye contact.
When I looked down, her side-tail apologised profusely.
"T-the feeling of a foreign body is amazing..."
It was by no means a positive impression.
Is it like this for the first time?
If it doesn't hurt, I guess it's fine.
"Do you think it's okay for me to move it?"
"Yes. Um, if you take it slowly, I'll get excited for a little while..."
"...Got it."
I don't quite understand girls' particular ways of expression.
That means the pleasure isn't zero, right?
Nice.
It's been all thanks to Miyu so far.
From here on, I'll make you feel good with my cock.
"Nn-... haah...... uuu..."
Slowly, as if checking the shape of my hard cock, Sachiko's reaction started to improve little by little as she rubbed against it.
This feels pretty good to me, too.
Maybe a slow tempo brings more pleasure than a violent thrust in and out.
"Aaguh... uuuu...! Hard... aah..."
"Sachiko... you feel... so good...!"
Still, my hips started to move faster and faster.
I want more.
I want to immerse myself in this fleshy feeling more.
I want to keep rubbing my genitals against this hole, which can truly be described as a meat pot.
I couldn't have slow sex.
"Sachiko... Sachiko...!"
"Angh... Onii, san... too, intense...!"
"Sh.. it..! I might, not be able to hold it in any longer...!"
"I-it's fine... please, cum...!"
Sachiko stroked her hips to match my movements.
Her body is telling me to finish inside her vagina.
Is it okay? Letting it out in this girl's vagina.
Even though Miyu's watching.
Even though my little sister was right in front of me.
Is it okay to use her friend's body to ejaculate and show her that?
"Ah... I can't, anymore... no more... ahhh... Sachiko...!!"
"Cum, ah, Onii-san, please cum...!"
"Haah... ah... I'm cumming... Sachiko... I'm cumming...!!"
Slam, slam, slam, I finally thrust my hips up as hard as I could.
It didn't matter if my little sister was watching or if it was my first time, I poured out all of my desires into that vagina.
"Onii-san...!"
"Sachiko...!"
Byu, byuru, byuku, byuru--!
My cock pushed hard against Sachiko's flesh walls and continued to eject sperm with all its might.
"Haah... haah... I c-came..."
"Haahi, phew, I'm glad you did it properly."
We were both out of breath.
Finally, Sachiko hugged me.
Ah, this is it.
Just like lovers.
Surrounded in incredible happiness.
I finally graduated from virginity.
With such a cute girl.
Sachiko and I were hugging for a while.
Miyu is nowhere to be seen.
Apparently she had left the room without my knowledge.
After her breathing calmed down, Sachiko got up.
When I raise my hips with my trembling knees, my still hard cock slips out.
The tip was made of white liquid.
This is the third time today, isn't it?
Miyu also told me that I give out too much semen.
"Ehehe. It's kind of embarrassing, isn't it."
Sachiko acts shy as she puts on the panties that Miyu took off.
"Yeah, I guess so."
After sex was over, there was a slight feeling of awkwardness.
It's not uncomfortable at all, but it feels frustrating and irritating.
Sachiko put her clothes back on, put one hand behind her waist, and pointed at herself.
"I'm Onii-san's girlfriend... so it's okay, right?"
Hearing that, my heart skipped a beat.
That's right.
I'm Sachiko's boyfriend.
"Of course. Shall we go on a date or something sometime soon?"
"Yes!"
In this way, that's how I managed to get a girlfriend.
After that, I chit-chatted with Sachiko for a long time, but there was no sign of Miyu coming down.
We split ways before the sun set.
I saw Sachiko off from the front door and returned to the house.
After I got my smartphone, I regretted that I should have exchanged contact information with her.
When I turned on the switch, thinking if I could ask Miyu for some advice, I received a message from Miyu.
--Congratulations on your graduation from virginity, Onii-chan.
I squeeze my hand tightly at those words.
"Yes, thank you."
I still felt Sachiko's warmth in my body.
I lay back down on the sofa, warmed by the body heat of both of us.
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