My Little Sister Is the Best F*p Material

Volume 1 Chapter 15: Even If I Have to Have Sex With Onii-chan, I Want To Confirm

“Haa… ten… kuh… twenty…”

I lifted my body, which was dripping with sweat, by propping myself up on my arms that were lying on the floor. According to Miyu’s instructions, I should start doing muscle training, and I was working hard on self-weight training with low load.

I did a full range of well-known exercises, such as sit-ups, back muscle training, and squats, and by the time I finished the third set, I was completely exhausted.

“Ahh, I’m tired… and this sweat…”

The reason I don’t like exercise is not just because it’s tiring. Rather, I actually like moving my body. I just hate sweating, and since doing home workouts would make my room dirty, I hadn’t been actively doing it until now.

(But now I can get a girlfriend.)

Looking back at my unhealthy self, I do think I’ve become a man who is worth dating, compared to my previous self. Since my point of comparison is always the bottom-dwelling me, even small things give me confidence, which is an advantage.

I wiped the floor with disinfectant sheets and moved to the bathroom. Thanks to repeating this every day, my room has become much cleaner. If I consider the possibility of calling a girl over someday, this is also a kind of training.

Miyu was out on this holiday. I had finished my muscle training after lunch, and I was planning to enjoy surfing the net in the cool room.

I took a shower, washed away the sweat, dried my body, and returned to the room with the air conditioning blasting. Since Miyu wasn’t home, I came back to the room naked, and without even putting on my underwear, I dived into bed.

“Ahh… I feel refreshed…”

This is the only moment when I feel grateful for exercise. I was alone in the house, and with no one around, I changed the setting temperature to the appropriate value, opened the curtains, and let the sunlight coming through the window shine on my whole body.

My body relaxed, and strangely, even without getting excited, my penis started to get hard. When it’s like this, the erection lasts longer without having to force my body to get excited. That makes me want to play with it.

(Ahh… I’m getting horny…)

Without using anyone as my masturbation material, I was jerking off naked and lying on my back.

— Come to think of it, when I get a girlfriend, I’ll be having sex with her. Miyu also said she would introduce me to such a girl.

Will I be okay? I’m a virgin, and I have no experience with women, and Miyu has told me I’m a premature ejaculator… She’s my sister, so she’s forgiving me, but if I cum too soon during my first sex with her, she might be disappointed.

“I have to practice…!”

I quickly prepared my onahole and lotion. I thought it would be disposed of along with my eroge, but she must have left it for me to use as a countermeasure for monotony when I would have wanted to have sex with her someday.

I rolled up the futon to create a virtual body of her, and I attached the onahole, which I had put lotion in, to the edge of it. Usually, I would just move the onahole up and down with my hand, so I had never used it in such a practical way.

My hip movement is also clumsy. I have to raise my piston skills so that I can make her cum. That anxiety was exacerbated by the fact that my body was stiff, and my knees didn’t open as easily as I wanted them to. There’s no way I can start stretching now and make it in time.

Even though it wasn’t a long onahole, it was quite a struggle to get my penis all the way in. It seems that a lot of training is required to be able to thrust my hips like an actor in the normal position. If only I had started practicing this way earlier.

“Fuu, fuu, fuuu… hmm…”

Clumsily, I was diligently moving my hips back and forth. The sensation of the onahole itself didn’t change, but I was excited by this posture, and the pleasure was unlike anything I had experienced before.

However, the sensation of ejaculation didn’t come right away. I got used to the movement, and as I hit my waist and hugged the futon, I started to thrust more vigorously. Next, I would use a naked girl as my masturbation material and continue this simulated sex. If I can hold back ejaculation even then, I can have confidence that I’m not a premature ejaculator.

Since I’m getting a girlfriend so that I won’t use Miyu as my masturbation material, I have to fantasize about someone other than her. In that case, it’s Yamamoto-san.

Since I was able to see her naked conveniently, I should be able to create a very realistic image. Considering the thickness of the futon roll, a big-bodied girl like Yamamoto-san would be just right. I would hug Yamamoto-san, twist my penis all the way to the back, and finish with a pleasant creampie. — That’s what I was thinking, but.

“Yamamoto-san… Yamamoto-san…!!”

I shouted with all my might as I moved my hips. But the moment of ejaculation didn’t come. No matter how many times I rubbed, no matter how much time I spent, I couldn’t seem to cum. My stamina was already depleted, and my limp penis, I fell face down on the rolled-up futon.

“No way…”

I can’t cum even with Yamamoto-san, who is the embodiment of eros. There’s no way I can do it anymore.

(Maybe I’m a delayed ejaculator? Or, could it be that I’m…)

Is it the case that I can’t cum even with sex unless I use Miyu as my masturbation material?

No, that can’t be. It’s because of the onahole, surely. If I have sex with a real woman, I should be able to cum, of course.

… Then, what if I imagine that this onahole is Miyu’s vagina?

Gulp, my throat made a sound. I’ve fantasized about sex with Miyu many times. I’ve even imagined her moaning sweetly. But the real thing shouldn’t be like that. Miyu will surely glare at me with a piercing gaze, but for some reason, she will obediently spread her legs and wait for my insertion.

“… Guh… Ahh… Mi, Miyu…”

Imagining that the soft bulge in my arms is Miyu’s. Feeling an imaginary pleasant scent that doesn’t actually exist in my nostrils, I inserted my penis into the onahole.

“Ki… It feels good…”

The hole suddenly felt like it was tightening. Miyu is feeling my penis. I’m having sex with my real sister, without even using a condom.

I’m about to cum. I haven’t even moved it three and a half times, but I can’t help but want to pour my semen into her vagina.

“Ugh… I’m sorry, Miyu, just wait… Uah, ahh… I can’t move at all… I’m gonna cum… Miyu, I’m sorry, I’m sorry…”

I apologized to Miyu over and over again for not being able to have normal sex. I can’t even satisfy her, let alone that. I can’t even piston. She might end up hating me. I have to hold back. I have to hold back so that I don’t cum…

“Onii-chan, do you really have any intention of getting a girlfriend?”

What? I heard a very realistic voice. Did the futon talk? Have I finally started hearing hallucinations?

“What!! Oh, aaaahhhh!! Mi, Miyu!?”

I turned to the door and was desperate. Miyu was standing there. She had seen me having serious sex with the futon, which had the onahole wrapped around it.

“Why… How did you…!? Where’s the knock!?”

“Of course I’ll enter the room when I hear my name.”

Yeah, that’s right. It’s all my fault. It’s my fault.

“But this is different! I was thinking about another girl just now, and it didn’t work out… I was just trying it out, what if it was Miyu…”

“Yeah yeah.”

Miyu was indifferent, even in this situation. Maybe she’s given up on me.

“So, did you cum?”

“I’m still holding on, barely.”

“Hmm.”

Miyu was looking at the junction of me and the onahole.

“What does an onahole feel like?”

“Umm… When you ask me what it feels like… I have the actual thing here…”

“Then can I borrow it?”

“S-Sure.”

I didn’t waste time with unnecessary questions and handed it to Miyu. The elastomer material meat tube, which had the same warmth as my penis.

“So this is what it looks like on the inside.”

Miyu stuck her finger in the hole of the onahole and touched the artificial meat folds inside. That’s where my penis had been a moment ago, but she doesn’t seem to mind that.

“When you insert it, does it feel like you’re having sex with a girl?”

“Kinda. I have no experience, so I don’t know how real it is. Rather, how does it compare to the real thing?”

“How?”

Miyu stirred the lotion and made a squishy sound. It was a lewd gesture.

“When you touch it with your finger, it’s not like the real thing at all. There’s no clear groove or protrusion like this.”

“Huh, is that so?”

What does Miyu mean by “the real thing”?

As I was thinking about it, Miyu’s face suddenly turned red.

“Oh, no! It’s not like I’m comparing it to mine or anything.”

“I know, I know.”

“Stop accusing me of weird things.”

“I’m sorry.”

Since it’s Miyu, she probably had the opportunity to touch the real thing when disciplining her friends. So I don’t even think for a moment that Miyu has ever touched her own vagina.

“By the way…”

“Yes?”

“I want you to consider this as a mere confirmation.”

“Don’t tell me you want to see me doing ‘that’ with my fingers.” (T.N: She’s going to rub the onahole to him.)

“Can’t you?”

“Of course not.”

I thought that as long as I didn’t touch her directly, it might be okay. But it seems that she won’t help me process my sexual desire after all.

“Look, you know, I’m going to get a girlfriend from now on. So, thinking about it, this might be the last time I can do it with Miyu…”

I can’t keep relying on my sister forever. The fact that she has been accepting my semen until now was abnormal. Still, since we have become like this, I wanted some kind of closure.

“That’s… certainly true.”

The words that came out of Miyu’s mouth were unexpected. Like some time ago, Miyu fell silent, blinked her eyes, and started thinking.

“What do you mean by ‘certainly’?”

“As you said, I think it’s the last chance we could do something like this.”

No way… Could it be that Miyu’s willing to give me a handjob with an onahole? Well, Miyu is pretty big on repaying favors. Maybe she has her own reasons for this.

“Hey, Onii-chan…”

However, the words that continued from Miyu’s mouth were once again beyond my imagination.

“What does sex feel like?”

For a moment, I stopped thinking.

“S-s-s-s-s, that, um, eh… u-uhm k-kind of… I mean, it’s probably… going to be amazing, or rather… My, uh, my size is, well, on the modest side, so even for Miyu, since it’s her first time… Ah, no, of course, I-I’m not saying it won’t hurt or anything, b-but, um, I don’t think you’d regret it… maybe…?”

I conveyed my best thoughts with a stutter. The emotion of wanting to do it with Miyu overflowed, and it was an answer that sounded creepy to anyone who heard it.

“Okay, I’ll get ready for a bit. Onii-chan, lie down naked on the bed.”

Miyu gave an unexpected answer, and I couldn’t calm my flustered heart, and all I could do was lie on my back on the bed.

“Is… this a joke…?”

I wanted it to be a misunderstanding. I didn’t want it to be a misunderstanding, but if this situation developed as I imagined, I wouldn’t be able to believe that this day was real.

Miyu was out of the room for about fifteen minutes. When she came back, she first came to me and folded the futon at the height of my chest and placed it there. The lower half of my field of vision was blocked by the futon, and all I could see was Miyu’s face and the ceiling.

“What do you intend to do?”

“Some kind of confirmation work.”

“Why did you cover my eyes with a futon?”

“Why… well, it’s embarrassing to be seen in some of my parts…”

That’s true. But I mean, yeah I agree with her covering my eyes, but. Shouldn’t we turn off the lights? Anyway, what kind of confirmation work is this?

“I’ll give this back to you.”

Miyu placed the onahole next to my head. It seems that she’s not going to use the onahole. Next, Miyu got on the bed and kneeled in a way that straddled my body. Then, Miyu–took off her pants and dropped them on the floor.

“What are you doing!?”

“Creating an atmosphere?”

It’s not atmosphere-making, it’s baby-making!

“Hey, at least use some contraception?”

“It would be too obvious that way.”

Wait, wait. That unexpected lack of sexual literacy is a problem, but why do we keep having conversations that match? This can’t be anything other than sex. And it’s raw, and we’re siblings.

“I’m going to put it in, Onii-chan.”

Miyu didn’t care about my consent and slowly lowered her hips. In sync with her movements, something soft and warm, almost human-like in temperature, enveloped my penis in a sticky embrace.

“Ah, aahh…!! Miyu, are we really going to… ggh, aahh…!!”

I, who had lost my virginity to Miyu with raw sex, tried hard not to cum inside her. But, in vain, by the time Miyu moved her waist up and down a few times, I was already at the limit of ejaculation.

“Miyu… I can’t take it anymore! I’m going to cum, I’m going to…!!”

Miyu looked down on me indifferently, and continued to move her waist back and forth. Of course, I couldn’t cum inside her vagina, so I tried to stop her with both hands–but Miyu grabbed my middle fingers, and I couldn’t even sit up.

“Don’t resist. If you’re gonna cum, cum.”

Miyu’s body moved up and down again, and her breasts bounced softly. At that sight, the thread of my patience broke. I tried to move my legs, but it was already too late.

“Ahh, ahh, ahh, aaaah…”

Doppuh–, as my brain understood that I had ejaculated inside Miyu’s vagina. Like a spasm, the urethral meatus opened up gupa gupa, and semen, which had been dammed up in the testicles, came out like a flood. Dop, dop, dop, dop, endlessly. The penis, which was inserted raw, kept swelling and contracting, and the stored sperm was sent to Miyu’s uterus.

“Ahh, ahh…”

Unprecedented pleasure and a painful emotion came over me, and all my strength left my body. My head was still working, thinking about the aftercare I had to do, but my hands, which should have been released, just grabbed at the air.

“Hmm. So this is how it feels.”

Miyu didn’t seem to have any feelings about it, and without even looking like she was enjoying it for a moment, she just muttered a dry comment. Then, as Miyu raised her waist, I felt a sensation of hot liquid dripping onto my abdomen.

“Wow, a lot is coming out. Onii-chan, you cum too much…”

Miyu was amazed, but I was basically raped, so I had no reason to be scolded.

“I’ll leave the aftercare to you. Here, tissues.”

Miyu got off the bed and handed me a box of tissues, just like the other day, and picked up the pants that were on the floor.

“Ah, ahh…”

I was thinking about how to take responsibility, whether I could still make it with the pill, and so on, using my brain’s capacity, and I wiped the semen on my lower abdomen, uncovering the futon.

“– What? What!?”

Then, with a few seconds’ delay, I noticed. The artificial meat hole, which had been filled with a large amount of semen, was placed on the bed.

“What? What!?”

I compared the onahole, which was right next to my face, with it over and over again, and confirmed that there were two identical objects. No mistake. There was another onahole, the same as the one I had.

“You should thank your studious sister.”

Miyu, who was finished putting on her pants next to me, said that to me. That is, I had not lost my virginity with my sister with raw sex.

“Ahh… I’m glad… I didn’t cum inside her…”

“I wouldn’t do it with you without contraception.”

“I wouldn’t have thought that Miyu had the same one.”

Miyu has been studying a lot about male sexuality since the incident with me. She probably bought this dildo after seeing the one I have.

“Ah. So, what was that confirmation process all about?”

“It’s a secret. But…”

Miyu, with her hand on the doorknob, turned to me and looked a little embarrassed, which was rare for her.

“Half of it was also because it was the last time.”

“So… in other words, it was a service?”

“Yeah, you could say that. But for the real thing, try hard with your girlfriend.”

Miyu left the room, leaving those words behind.

I was lying on my back in the quiet room, looking up at the ceiling. I wondered what Miyu wanted to confirm by pretending to have sex with me.

(There’s no use thinking about it…)

I got up and took the dildo I used for creampie in my hand. The toy, still warm on the outside, was probably the one Miyu had been holding between her thighs. From now on, whenever I use this dildo, I’ll probably remember the scene of the fake creampie sex we had today. But this thing should be unnecessary for me now that I’ll have a girlfriend.

At least while Miyu’s body heat was still there, I caressed the soft texture of the dildo, and my finger slid over a spot.

It was the top part of the dildo, opposite the hole.