My Little Sister Is the Best F*p Material - Volume 1 Chapter 08: Using My Sister's Friend as a Masturbation Material Part 3

Volume 1 Chapter 08: Using My Sister’s Friend as a Masturbation Material Part 3

T/N: Fr, skip around 2/3rd of this, you’ll be out of your wits frfr. Anyway it’s all because of Miyu’s antics. And there’s a big reason as to why she is so angry at Yuka that she even did ‘that’.

A few minutes had passed since Miyu had taken some suspicious items upstairs.

I was sitting on the sofa, staring at the black television screen with nothing to do. Since Haruka was off-limits as a masturbation aid, my penis, which I had tried to keep mindless, had softened completely.

Since I had told Miyu that I couldn’t get aroused just by looking at Yuka’s images, it was now beyond doubt that she was preparing something new. With nylon tape and a long piece of cloth, it was obvious that it was a tool for restraint. I couldn’t believe that there was someone in reality who would go to such lengths for her Onii-chan.

No, it was for Haruka. I didn’t know the circumstances between the two of them, but it seemed that Miyu couldn’t stand up to Haruka.

Still, Haruka… Putting a vibrator in during class. And on top of that, she was obsessed with girls. It was such a waste for such a cute girl. If the object of her sexual affection was a man, she could have gotten any man she wanted, like going shopping at a convenience store.

Wait, it’s not good to think about this either. Miyu had ordered me to forget about Haruka, but how could I forget about a girl I had only spoken to once, when even studying, which I repeated over and over, still didn’t do anything?

“Onii-chan. I’m sorry to keep you waiting.”

My sister, peeking her face through the door, first checked my crotch.

“I haven’t.”

“Good.”

Miyu withdrew her head and beckoned me with her hand. I followed her invitation and went out into the hallway, where a serious-faced Miyu was waiting.

“We’re going upstairs, right?”

“I’ll show you the way, so follow me quietly.”

Miyu raised her index finger to her lips and tiptoed up the stairs. She moved her feet carefully to make as little noise as possible, and when we reached the door of my room, Miyu pulled the adhesive tape she was holding.

She brought it to my mouth and gently attached it to my cheek, whispering to me.

“Don’t make any noise, and no moaning either.”

Miyu’s soft voice blew into my ear. My lower abdomen shivered with excitement at this new experience. When the tape was stuck to both ends of my mouth, Miyu gave me the “quiet” sign again and opened the door to my room.

The inside was dimly lit. The sunlight was blocked by the curtains, and only the light that leaked through the gaps created a faint outline of the room.

I followed Miyu into the room and closed the door. After the door knob clicked, a few seconds of silence passed, and then I heard a sound like air leaking.

When I listened carefully, it seemed to be the sound of human breathing, a faint, labored breath, “Hoo, hoo.”

(Is that…!?)

“Munh—!”

Miyu warned me by pulling on my clothes as I let out a surprised voice.

I stepped back and stared at the sight before me.

A girl with her arms tied up was lying on her back. Her blouse was unbuttoned, revealing her round breasts like hills. Her skirt was barely wrapped around her waist, exposing her private parts while she was still dressed.

“Onii-chan. Come here.”

Miyu gave me instructions in a voice just loud enough to be heard.

I was moved to the space between the girl’s legs, who was restrained and lying down. Her soft thighs were spread like a butterfly and fixed with nylon tape. In the center, the petals were alive. A sticky liquid was oozing out, moistening the crack between her buttocks, which were also spread open to the same width.

“U… fuu… nnn—!”

The girl sensed someone entering and moved her tongue as much as she could with her dry mouth, moaning around the gag ball. Her brown, glossy twin tails swayed weakly, and her moans echoed, as if she was begging for help.

Because her eyes were covered with a cloth, she–Yuka–was unaware that I was right next to her. She probably didn’t even know that this was my room. As she tried to escape from the restraints forcefully, more love juice leaked out from her further-spread secret slit.

“Well, let’s take off her clothes first.”

Miyu’s voice, which kept whispering in my ear from behind, tickled me, and my testicles throbbed with each whisper. The pre-ejaculate was seeping through my pants, making them damp.

I was wearing only a shirt and socks as Miyu removed my lower body clothing, and I was standing in front of my sister’s friend, my penis fully erect. I felt incredibly humiliated and incredibly aroused.

“Then you can do it with this, right?”

Miyu urged me to masturbate, using the girl’s exposed private parts that had been forced open.

I could do it. If I rubbed it a little more, I could ejaculate a large amount of semen. –But I couldn’t do it. If I did, I would be spreading my semen in a place where there was even a possibility of pregnancy.

“Onii-chan.”

Miyu urged me again, as I was reluctant to move my hands.

For some reason, I couldn’t disobey her voice.

“Nnn, fuu—!”

I watched the love juice flowing from Yuka’s honey pot as I stroked my penis hard.

“Mug, n-ah! Nuhuu—!”

Yuka and I, both restricted in our actions, could only moan.

Only my vision was given priority. Yuka probably didn’t even consider that her body was being used for masturbation right next to her, with her eyes covered. She was being used as a masturbation aid and was being covered with semen without her consent.

That was too much. No matter how much I gave in to my excitement, I couldn’t do that as a human being. No matter what the reason, it was never permissible to ejaculate towards the genitals of an unknown girl.

“Are you about to come?”

A breath brushed my ear, and my penis twitched.

It was Miyu’s voice. She was the one to blame.

The stroke of my right hand was accelerating rapidly towards the critical point. Miyu probably realized that I was no longer able to hold back my ejaculation as she watched my hand. If I kept moving my hand, I would ejaculate in just a few seconds.

I shook my head vigorously. Desperately, over and over, as if to shake off the devil’s whisper.

“It’s okay, Onii-chan.”

“Nnn—!?”

Suddenly, my vision was taken away. The stimulation, which was evenly applied from the root to the glans, took away the incentive of Yuka’s naked body, and

“Let’s fill it up like this.”

Instead, Miyu’s voice, which seemed to flow into my eardrum, dominated my brain.

Her voice, sweeter than usual, echoed in my ear, and my head felt fuzzy, as if I were dreaming. Control of my right arm was taken away, and my steps towards ejaculation could no longer be stopped.

I was… done for. As a human being, I was done for. I was about to ejaculate into the vagina of an innocent girl I had only met a few minutes ago.

“Nnn… nnn—!!”

In the darkness, the semen, which had accumulated to the limit, burst out with force as it was stimulated by my right hand. At the same time, an intoxicating sensation spread throughout my body. The penis, which had been rubbed until the very end, was pointing downward, as if the sperm were flying towards Yuka’s honey pot.

I did that. I prioritized pleasure over anything else. I could have changed the direction of ejaculation however I wanted, but I, who couldn’t resist my own desires, had soiled the purity of a young girl. By now, Yuka’s love juice and my semen must have mixed together and were probably dripping down her anus.

I was the worst. The worst… but… it felt so good that I wanted to die.

“Yuka. Are you repentant yet?”

Miyu released her hand, which had been covering my eyes. In the recovered vision, Yuka’s lower body was no different from before.

My semen hadn’t been applied to her. It seemed that Miyu had skillfully taken care of it.

(Haa… I’m… so glad…)

Relief and regret squeezed my chest together. That’s right. Of course, my sister wouldn’t go that far with her friend. But my lack of backbone had been proven beyond a doubt.

“Mug… pu, haa… miyu… uuu… I’m sorry… I’m sorry…”

Yuka apologized with tears in her eyes as the gag ball was removed. The sight of the girl, whose genitals were exposed while she was restrained and her eyes were covered, was more than enough to arouse me, even though I had just ejaculated.

“What are you sorry for?”

“I’m sorry for using Miyu’s textbook without permission, looking through her pencil case, copying her homework… I’m sorry.”

Yuka repented while catching her breath.

“Is that all?”

“Umm… changing the names on the answer sheets, faking the results of the physical fitness test… eating Miyu’s bento, peeking at her smartphone password, and playing a lot of pranks…”

Her rough breathing, her clumsy tongue, which was trying to lick the saliva around her mouth to moisten it. It seemed that just being fitted with the gag ball was quite tough for her. But she had done enough bad things to deserve it.

“Is that all?”

Miyu repeated the same question. It seemed that she had not yet obtained the answer she wanted.

“Uu… Yuka’s stupid, so I don’t understand… I’m sorry, Miyu. Please forgive me. I really regret it.”

Yuka’s voice was trembling, and her labia were moving up and down in time with her apology.

“So, you’re a bad girl, Yuka.”

“Yes, I’m a bad girl… So, I’ll apologize a lot and repent a lot, so please forgive me.”

“Repentance doesn’t come without results. So, I’ll give you a medicine that will make you smarter.”

“Huh? Is that so? I want it!”

Yuka opened her mouth, seeking the convenient medicine that would make her smarter, which obviously didn’t exist. What Miyu took out was a single mug.

As soon as I saw it, I broke out in a cold sweat on my back.

The white liquid with high viscosity that flowed from the tilted cup… there was no mistake. The liquid that Miyu was trying to make Yuka drink was the semen that I had just ejaculated.

“A-ah… nnn!? Ngu!!”

As the semen, which was oozing out with a thread, landed on Yuka’s tongue, she jerked her body and twisted her face horribly.

“Don’t move so much, Yuka. Otherwise, I can’t make you drink it.”

Agony was written on Yuka’s face, which was refusing to accept it. If she opened her mouth, semen would be poured into it. On the other hand, if she kept her mouth closed, she would never be able to spit it out.

Miyu tried to force her to drink it, but when Yuka closed her mouth, the semen that bounced back dripped from her mouth to her cheek. She seemed to find even the warmth of it unpleasant, and Yuka shook her face with all her might.

“I won’t forgive you if you don’t drink it.”

Miyu licked it off and put it in her mouth. Then, she forced her finger into Yuka’s mouth and opened her lips, and she poured the rest of the semen into her mouth along with her saliva.

“Nnn—!”

Miyu now pressed Yuka’s mouth shut with her palm as she tried to spit out the semen. The struggle between Miyu and Yuka continued for about a minute, and when Yuka’s strength to resist was gone, she managed to swallow the semen with several spasms of her diaphragm.

“Uhh… guu… what is this… this is so terrible…”

The cloth covering her eyes was wet. Two distinct stains were clearly visible, and more love juice was oozing out from Yuka’s secret slit.

“It’s a medicine that will make you smarter. Do you remember anything else?”

“Ugh… um, during cleaning time, I poured a bucket of water on someone, and I hid someone’s underwear during swimming class… I did all that, and I’m really sorry.”

The more Yuka’s misdeeds were revealed, the more they came to light. I didn’t know if this treatment, which seemed like torture, was commensurate with her sins, but Yuka confessed anyway.

“Is that all?”

Miyu continued to pursue the matter. She asked the question without changing her tone, even in front of her friend, who was crying her eyes out.

“That’s it! Really! I’m sorry, I’m sorry! I won’t do it again, so please forgive me! I’ll listen to everything you say other than about drinking that medicine…”

“But you can’t remember, can you? So I guess there’s no choice but to give you the medicine.”

“Ah… ahh… aah… aaa…”

As I was about to stop her, seeing that Yuka was on the verge of a mental breakdown, she began to move her mouth slowly again.

“Miyu’s…”

Yuka’s breathing began to calm down. It seemed to be a confession made with determination.

“I was holding her bag. Last week, on Sports Day… when Miyu was called out by the teacher to talk about the competition.”

Yuka’s breathing became shallow. She looked as if she were about to die.

“So… um… um, the, the boy in the class… asked me to lend him the gym clothes, so…”

The words spun ominously. Yuka’s voice was getting muddy and shaking.

“I lent Miyu’s gym clothes to a boy in the class.”

After she finished speaking, there was only the sound of her breathing for a while. Miyu just stared at Yuka in silence. It seemed that this was the answer she was looking for.

“Why?”

Miyu’s question changed. Yuka probably only meant to lend them secretly. But somehow, Miyu had found out about it.

“Because, at that time, Miyu and Haruka…”

Yuka’s voice was getting higher. It was clearly the attitude of someone who was defiant.

“You didn’t show me the homework printouts, so I lent your gym clothes in exchange for them letting me copy the answers. Everyone said they would, and they said they wouldn’t dirty the gym clothes. In fact, when I got them back, nothing was wrong with them, and Miyu didn’t even know, did she?”

I didn’t know how deep the relationship between Yuka and Miyu was.

But I could say one thing for sure. Because Yuka had let a boy touch Miyu’s clothes and probably even use her scent, Miyu’s anger must have exploded to the point where she didn’t even think of her as a human being anymore.

“There’s no way a boy who borrows a girl’s used gym clothes wouldn’t do anything.”

Miyu delivered an argument that left no room for counterargument.

“Well, it seems like you’re repentant. I’ll let bygones be bygones. Yuka has also done a lot of good things, like being the class representative and pushing for an unreasonable plan for the school trip.”

The reasons why Miyu wanted to be friends with Yuka. That also existed as an important feeling.

I thought they had a good relationship. Although they had done terrible things to each other, it seemed that there was a bond between them that could be called friendship.

“But I think that all the bad things Yuka has done so far are just because she can’t study.”

After saying that, Miyu turned to me.

“So, drink a lot of medicine.”

Yuka shook her twin tails to the fullest to show her refusal of the medicine.

“No! Nooo! I don’t want to!”

“Okay, Haruka will be back soon, so be quiet.”

Miyu put the gag ball back in Yuka’s mouth and beckoned me directly to Yuka’s face.

“Well, let’s start the repentance meeting.”

She made me kneel and then brought her face close to my ear again and continued in a small voice.

“— Hey, Onii-chan…”