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Chapter 15

Health Education Class With Miyu-Sensei

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I was sitting down on the sofa in the living room, desperately trying to get my stiff body and thoughts to move.

"Onii-chan. Strip."

Miyu uses the pointing stick to poke my penis through my pants.

Although it was indirect, it was the first time I had been stimulated by Miyu.

If she kept that up, I'm sure I'd be able to ejaculate just like that.

I could almost feel the tip of my underwear getting damp.

"It's really swollen, isn't it?"

"Why don’t you try touching it too, Sachiko?"

There were two girls standing next to me.

My little sister Miyu and her friend Sachiko.

"Can I touch it? This is the place where boys feel good... right?"

"That's right. The same place as Sachiko's."

Miyu sneaks her arm around Sachiko's thighs from behind, places her hand inside her panties and moves her fingers.

"Fuaah... nkuh... Miyu-cha... don't..."

Perhaps because Sachiko was used to masturbating, she seemed to be really sensitive.

For a while now, they've just been getting excited all on their own.

Damn it.

I'm going to cum just by watching.

"Onii-chan. Can you just take it off already."

"...O-Okay."

What they want is my undressing.

More to the point, I am expected to expose my cock.

This situation would be strange, normally.

Because I want to have sex with a girl.

But before I realised it, I was the one receiving orders.

I was told to expose the contents of my trousers, swelled with guilt and excitement, right in front of these girls.

It all started when I told my little sister, Miyu, that I could only bust a nut to her.

Miyu pointed out that I had little experience with women, and suggested that I should get a girlfriend to make up for it.

Even though I was immersed in 2D, I had a strong desire to 'lose my virginity' and 'have sex with a girl.'

And that me, am hesitating to take off my pants for sex after being ordered.

This should be a situation that everyone would envy.

"I-I'll strip..."

A tingling sensation runs through my body.

I've undressed many times in front of Miyu, but I have no experience doing so in front of other people, even including men.

Yamamoto-san took them off herself, and even Miyu only saw me with my underwear down at first.

I have to deliberately take off my underwear and expose my private parts in front of others.

What's more, it was erect to the max.

Sachiko seems to be unaware, so maybe she won't think anything of it even if it gets bigger.

But behind her is Miyu.

In front of my little sister's friend, it will become clear that I am fully prepared.

"You're taking too much time. Sachiko, go take it off for him."

"Fueh!? M-me?"

My zipper was already down, but just as I was about to raise my hips upwards, I decided to sink back down onto the sofa.

It's exciting to strip and show everything off.

It's also exciting to have a clueless girl awkwardly undressing me.

Either way sounds amazing.

Sachiko timidly reaches out to my waist.

Should I have just done it myself?

"In exchange, Onii-chan, please take off Sachiko's panties."

"Me too!? Stripping my clothes!?"

"Yeah."

"Uuu... in that case, I'll take it off myself..."

Sachiko puts her feet down from the sofa and stands up.

I had no choice but to take my own underwear off myself.

"Is Sachiko embarrassed to take off her panties?"

Miyu also stands up along with Sachiko and wraps around her back.

You like hugging her from behind, don't you.

"Because, um, you see..."

Sachiko turns her head and whispers in Miyu's ear.

She gripped her skirt tightly and blushed slightly.

"Hmm. So that's why you're so embarrassed."

"Yeah, because it's weird..."

Sachiko twirls the ends of her side-tailed hair with her fingers.

Yamamoto-san also does the same gesture, doesn't she.

"But it's okay because you can't tell from the outside."

"R-really...?"

Sachiko is told something by Miyu and puts her hand on her own panties.

She pulls the elastic band with both hands and pulled down her panties so smoothly that I wondered why I had even hesitated before.

Her skirt masks the secret place where her important parts are hidden.

From there, a stream of love was dripping.

Sachiko has her own love juice on her fingertips and takes a small breath.

She froze, her mouth closed, and then pulled her panties up again as if nothing had happened.

"Miyu-chan, I can't do this after all..."

"Yeah. Shall we stop?"

Miyu pats Sachiko's head gently.

I wonder what this conversation was about.

Sachiko seemed heartbroken beyond thought.

Miyu comforts Sachiko by holding her in her arms, even in her chest.

She glared sharply at me, who was still in the process of undressing.

I had the younger girl undress first.

Even if it was hidden by a skirt, it would be bad to let a girl lead the way.

I lowered my zipper, lifted my hips, and slid my pants down to my legs.

At that moment, I was still leaning forward.

My cock was about half-hidden inside my T-shirt.

Sachiko stopped comforting herself and turned her attention to me.

This is a girl who doesn't even know what to use it for yet.

In front of such a girl, I thrust my hard cock towards her.

"Wow... it's completely different from what girls have."

That was Sachiko's comment.

I don't know how much children today are learning in terms of health and physical education.

I'm starting to wonder if this reaction is okay.

"Yes. Then Sachiko, sit in front of Onii-chan."

At Miyu's urging, Sachiko sat down between my thighs.

Unlike Miyu's indifferent face, Sachiko stares at my cock with an enthusiastic and serious face.

Every time I twitched, her blinking increased.

"I don't really understand because it's so different from mine. Does it feel good when you touch it?"

Sachiko asks Miyu, perhaps because of the difference in intimacy between me and her.

The actor did not answer, but sent me a gaze and passed the question to me.

"I think it would feel better if you touched me."

I've never been touched by someone else.

I've only ever touched the boobs of two people.

That, in its own way, is a pretty strange journey.

I've never had someone touch me with their hands, so I don't know if it feels good to be touched by someone else.

Things such as handjobs exist, and I myself masturbate, so I don't think it would be unpleasant at all.

"Is that so... Can I touch it?"

"Ah, I would be glad if you could."

Miyu has rejected me in a lot of ways.

The act of stimulating the male genitals with one's hands.

Sachiko brought her hands closer and began to touch them with her palms.

"Uuu... ah..."

A body temperature different from my own.

My breath leaked out, feeling a softness different from my own hands.

"It's hot and hard."

Sachiko wraps her hands around my cock, and uses her fingertips to check the softness of the glans and traces the underside of it.

"Ahh... feels... good..."

"Am I doing it right?"

"Yeah. Pretty much."

Sachiko probably doesn't know anything about handjobs.

So all she does is squeeze and poke it.

Miyu came from behind Sachiko and turned her smartphone screen towards Sachiko.

"The soft part is called the foreskin, and the umbrella part is called the glans. It seems to be the most sensitive area."

"Uh-huh."

Sachiko gently stroked the place indicated by Miyu.

I guess she is well aware of the sensitivity of her own secret parts, being so gentle to the touch while lacking so much knowledge.

The way she touches me is better than I expected, so I don't know if I can hold back my ejaculation before she finishes explaining.

"The hole in the tip is where the pee and semen come out, and the line with a slightly different color on the back is also different in sensitivity." The bag at the root is the testicle... the scrotum? I don't know what it's called, but it looks like the place sperm accumulates."

"That's a lot to remember. I can't even imagine that bag thing being a part of my own body."

Sachiko's fingers stretch out towards my scrotum.

The moment she stroked my skin, I felt a thrill of pleasure that made my knees tremble.

"Ah, there, that's amazing..."

Good.

Too good.

The bliss of being touched by someone else.

If it's for this purpose, I can understand why adults would pay for such things.

"It's just as sensitive as the glans, and it's the part that's most vulnerable to stimulation, so be careful when you touch it."

"Got it."

"Also, it seems like it's common to move your hands up and down and rub them. Try it based on Onii-chan's favorite naughty video."

"Yes. I understand."

The erotic anime video that was transferred to her smartphone without my knowledge is being played mercilessly.

That's a video you shouldn't use as reference.

All I could do was remain silent in front of the two girls who were engrossed watching ero-anime.

"The key points to take away are looking upwards, verbal teasing and a submissive facial expression."

"Uh, look up, verbal teasing... submissive face...?"

"Basically just look like you're bewitched with lust."

From the audio that leaks out, I can tell which work Miyu chose.

In this anime, the main character, who used to be a member of the home economics club, is invited by the heroine to join the club again and is asked to have sex with many of his juniors as a way to practice building a happy family life.

I'm glad it's not some little sister fetish work.

Or maybe she just avoided those.

Anyways, let me tell you something.

Ordinary couples do not make submissive faces nor do they verbally tease each other.

"O-Onii-chan is naughty, after all. I guess he just likes... this kind of stuff...!"

She handled me with a certain amount of grip strength.

Sachiko seems to be doing her best.

“Aren’t you embarrassed to be treated by your juniors…!?”

"Guh...!"

It's cheating to adapt that to the current situation.

Shit-.

For a moment, I was about to ejaculate.

Stop stop.

"Ah, d-did it hurt? I'm sorry. I'm not very good at it."

Sachiko misunderstood because I suddenly stopped her.

Even though she's been working so hard.

"No, that's not it. How should I put it..."

"Onii-chan feels so good, he's freaking out."

"I see. That's a relief. I'm glad I did it right."

I can't honestly say that I was about to cum.

A rescue boat from Miyu when I'm in trouble.

Sachiko smiled cheerfully and was relieved.

While I patted my heart, I felt uneasy when Sachiko pulled on my arm and said, "I've firmly remembered it."

I wonder if it's a good thing that I taught her this kind of stuff.

"Also, I think it feels good to lick it."

After Miyu spoke up, my spirits were instantly lifted up.

Lick it.

Basically, a blowjob.

If it's just touching, even medical professionals will do it.

But licking is something that is never crossed normally.

So that's something special.

Some people consider blowjobs to be abnormal.

So much so that it is contraindicated.

Is she willing to step over that boundary?

"This? Should I lick this hard thing?"

"Yeah. I think so. Onii-chan wants you to do that very much."

While explaining, Miyu glares at me from the side.

I know, forgive me.

Because I forced myself to ask Miyu too many times.

I wasn't able to get her to do it herself, but even with this result, I guess it turned out well.

"Hmm. I guess the reason it's turned into a stick like this is to lick it?"

"Maybe so."

"It tingles and the hardness changes. What a strange feeling."

"Of course. If you look closely, why is it shaped like this?"

No way, little sister of mine.

That's part of health and physical education.

...Maybe, when Miyu says 'shape', she's referring to that kind of meaning?

"It's actually a little cute."

Sachiko looks at my cock with the eyes of a kindergartener.

"Eh... is that so?"

Miyu distances herself from her.

I don't think so either.

“You can just do what you did earlier with your tongue.”

Sachiko supports my cock with the fingertips of both hands as if holding a rice ball.

She brought her face closer to the tip.

Is this fine?

That's the place Miyu explained earlier where urine and semen come out.

Even if you don't understand semen, you can at least understand what the urinary system is like.

"Um... can I lick it?"

Sachiko stops, unclear whether her lips are touching the glans or not and asks.

'Can I lick it,' you say?

I can't believe the day had come where someone would hold my cock in their hands and ask me such questions.

"I'd be glad if you could lick me."

"I understand."

I guess you could call it blowjob virginity.

Sachiko was more interested in this than the actual performance, and she easily accomplished it.

Firstly, she licked the back muscle.

Then, she carefully ran her tongue down to the part of the penis that Miyu had taught her was sensitive, and carefully licked it all the way to the tip of my glans.

"Aah... ah... that's... really great...!"

I felt weak and my voice trembled.

The melting heat in her mouth slides down my cock.

Sachiko's face as she tries her best is also unbearably erotic.

Her tongue swirls moistly from the base to the crack of my urethra.

An unbelievable pleasure.

But that didn't last as long as I had hoped.

I got used to it faster than I expected.

It's so frustrating that I can't change that, even though it felt so good.

"There seems to be a proper way to lick it. It's a good idea to lick the surface of the bag as well. Also, stick your tongue out as much as possible to increase the contact area. They say the most important thing is to apply plenty of saliva."

"Huh. Ish thash so."

Sachiko wriggled her tongue back into her mouth, then moved her lips close enough to kiss the back muscles and rubbed her saliva-drenched tongue there.

"Ah--!!"

It felt so good I fell backwards.

It's completely different.

The level of pleasure creeping up on me was something else.

Sachiko's licking style has become much more sophisticated, licking my cock while occasionally kissing it.

I'm in heaven.

I can't believe there was a world that felt as good as this.

I want to live my whole life doing this.

"Doesh it... fheel ghood?"

"Aah, I'm just in happiness..."

"Ehehe. ...nn-chu. That's good."

Sachiko scratched her cheek in embarrassment.

I don't care if she was embarrassed for a different reason.

I just want to be licked.

"This is the next reference material."

Miyu quietly presents her smartphone, trying not to get in the way.

Of course, what is shown there is ero-anime.

That's the blowjob scene.

"W-wow, that's amazing. It seems like it's going to fill her mouth."

"It looks like this is the main thing. Do it in your mouth and use your tongue to stimulate it..."

"Yes, yes."

Two people watching ero-anime in front of a real penis.

It's good that you're eager to learn.

I would really like it if my assets were used for that purpose.

"I've seen a lot of other things, too. It seems like what Onii-chan likes is to not support him with your hands like you did before... but to hold him around the waist with his hands, and just use your mouth. Also, he seems to prefer submissive faces. "

"Yes. Submissive faces are the norm, Miyu-sensei."

Sachiko gradually turns pink.

A pure, pale pink color.

“Um, something like this.”

Breathing heavily with her cheeks puffed up, Sachiko screwed my cock straight into her own mouth and tongue.

She makes full use of the flesh and saliva in her mouth.

Maybe it's because of the anime, but she takes it all the way to the base in her mouth and moves his tongue around it while sucking up the saliva that's about to overflow.

“Aah, ah, ah… wait, c-cumming…!!”

It was too sudden.

I could only stand it for a few seconds as she moved her slurping mouth with her face seemingly lost in pleasure.

I was instantly killed by the sudden heat that enveloped my cock.

"Nn? Nnn...?"

"It's all right, Sachiko. Drink it."

"Nguh... un..."

At Miyu's command, Sachiko freezes with the base in her mouth.

It's not good to leave it as it is.

I'm going to suddenly cum in the back of your throat.

"But... it's already... guh, aahh--!!"

I ejaculate at equal intervals, forcing the semen down.

"Nnnhh!? Nnn!! Nn~!!"

Sachiko was surprised and pulled her head back.

Miyu held it tightly and suppressed it.

"Drink."

"N-nn!! Nn-!! Nn---!!"

Sachiko shakes her head to resist.

In the meanwhile, my semen was being spat out into Sachiko's mouth, and by that time, all my feelings of pity were blown away.

It just feels so good to cum in her mouth.

"Hmm. No good, right?"

When my ejaculation subsided, Sachiko released her mouth, but Miyu covered it with her hand.

To keep her from vomiting.

She really wanted her to drink it, maybe for my liking.

"Nn... uuu..."

Sachiko's eyes were bright red.

With tears filling her eyes, she slowly shakes her head and pleads to Miyu.

"I see."

Miyu also let go.

Sachiko's diaphragm twitches, unable to breathe easily.

"Uyy... Miu... forgibe me..."

Half of her mouth was filled with semen, probably due to her saliva.

Sachiko looks like she's about to vomit, using her hands as a saucer and looking down.

"It can't be helped."

Miyu pinches Sachiko's cheeks with both hands.

Then, she gently placed her lips on Sachiko's, who was trembling with tears.

Screwing her tongue in, she goes to snatch what's in Sachiko's mouth.

"Nnh..."

Sachiko's face had changed from pain to pleasure.

A while after the kiss started, and even after it seemed like the semen had already been transferred, Miyu continued to lick the inside of Sachiko's mouth.

"Nn... smooch... haah. Sorry for making you drink that."

"Fueh... i... it's fine...."

Sachiko falls to the floor.

It was clear what actually caused that.

"Onii-chan, you came too much and your sperm is too thick. It wasn't like this at first. Think about Sachiko more."

"Don't say the impossible."

If I could control the amount of ejaculation, I wouldn't have ejaculated like before in the first place.

I didn't think blowjobs would feel that good.

This... is going to get me hooked.

"Get up, Sachiko. We're gonna keep going."

Miyu tugged at Sachiko, who was travelling to heaven, and pulled her body.

"Keep going...?"

When I asked, Miyu stood up and put her glasses back on.

"Sex."

She extends her pointing stick with a snap all the way to my penis.

On the half-hard cock that I had just ejaculated with.

"You can still cum, right?"

Miyu asked me, and I began to feel anxious as I suddenly felt tired.

Yesterday I ejaculated a large amount on Miyu's breasts, and just this morning I came into Miyu's mouth as well.

On top of that, I gave everything I had for that blowjob earlier.

Yes, my goal today was sex.

I have my limits no matter what.

"Miyu, I'm sorry but..."

I can't cum anymore.

The actor approached me just as I tried to say so.

She straddled my lower body with my cock still exposed.

Even though she was sitting lightly, Miyu and I were in a pseudo-face-to-face position.

My half-erect cock began to get hard again.

"Onii-chan."

This time, a hand reaches out.

Behind my shoulders.

Miyu put her hand on the back of the sofa and brought her face close to my ear.

"Se-men. You can still let it out, right?"

It's like some kind of magic.

In an instant, I regained the feeling of ejaculation.

She was devilish.

I don't even know where on earth I have enough semen left to ejaculate, but I'm already preparing for my next ejaculation.

Miyu gets off the sofa and strokes Sachiko's head.

Miyu spoke those words clearly to both me and Sachiko.

"You guys are going to have sex, okay?"

I might not even be able to stop ejaculating if Miyu orders me to.

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