My Little Sister Is the Best F*p Material - Volume 2 Chapter 09: Sister and Toilet

Volume 2 Chapter 09: Sister and Toilet

I had always been envious of the concept of “home dates.” In games and anime, the protagonists, despite being students, all seemed to have the means to live alone, and that’s probably why they had those erotic mishaps… Until now, I had been indignant at such an unfair birthright.

“Sorry, it’s always the same old sight.”

“It’s fine. It’s a hassle to go out at this time of year.”

After inviting her to my room after school, we sat on the bed together. I had been unable to tell Sachiko, who had no idea that I used my sister as a sexual aid, about the complex feelings in my heart for more than two weeks.

As July entered its latter half, summer was finally in full swing. Playing in an air-conditioned room was the most comfortable thing, and we studied together in the house, sometimes cooked for each other, and ended up engaging in sexual intercourse.

It wasn’t out of a sense of duty. As a man, my sexual desire would build up in just a few days, and Sachiko didn’t refuse my invitations because she didn’t mind it and found it enjoyable.

After being together for a while, I became aroused, and the physical distance between Sachiko and me became closer. When our shoulders touched, we would touch each other’s arms and thighs, and in the end, I would say the usual words.

“…… It’s about time, don’t you think?”

“Yes.”

Since we were dating with the premise of having sex, it was natural that we would flow into sex when we were in the same room. Sachiko understood this, and when she noticed that I was lustful, she would try to make eye contact more often, and just five seconds of staring was enough as a signal to start the act.

The order of sex was also roughly decided. First, I would take off Sachiko’s clothes and touch her body, focusing on her breasts. After confirming that her vagina was wet, I would tease her with my fingers and loosen her vaginal muscles. This was my foreplay. It would probably be best to make her orgasm before insertion, but I didn’t have the skill to make a girl orgasm, so I gave up.

When Sachiko was ready, I would then have her perform fellatio. It was exciting to put my penis in a girl’s mouth, and Sachiko’s fellatio was a blissful pleasure as she licked my groin and scrotum diligently. However, I felt sorry that I couldn’t ejaculate, so I would stop it immediately. Therefore, in the end, we would move on to insertion. It was a natural flow since it was sex, but I also had a desire to sometimes ejaculate in her mouth.

“Sachiko. I’m going to insert it.”

“Yes.”

I pressed my hardened penis against Sachiko’s cleft, who was lying on her back on the bed. I rubbed her clitoris with my erect penis, giving her a light stimulation and tease, and then inserted the rod, covered with a condom, into the girl’s small hole.

“Does it hurt?”

“No, it’s fine. It feels good.”

Even though we had had sex many times, I always checked with Sachiko. Her reaction was thinner than I had imagined.

It didn’t seem like she was lying about enjoying it, and she seemed to like sex, so that was one less thing to worry about. But as a man, I couldn’t get fully aroused. I realized that writhing and moaning was too much like an AV or erotic game.

I moved my hips back and forth, rubbing the meat against each other. I wondered if I would feel more of the meat folds if it wasn’t through the rubber. Although having it raw would increase the excitement, there was also a risk of pregnancy even with just pre-ejaculatory fluid, so I couldn’t ask to let me insert it without a condom. There are some sex acts that you can’t do even if you have a girlfriend.

I tried changing the angle and stroking, as if rubbing the penis head against the vaginal wall, and moving to hit a better spot, but neither of us really knew the details of the state of the vagina. There was only the sensation of flesh and temperature. I was excited and felt like ejaculating, but…

“Sachiko… I’m going to get rough…!”

“Come… please…”

The bed creaked, and only my anxiety grew.

I was worried that I wouldn’t be able to ejaculate today, too.

Having sex with Sachiko was already the third day in a row. It wasn’t that I had become addicted to sex, but rather, I had not been able to have proper sex since the day I lost my virginity. Or perhaps, even that first sex was only made possible by Miyu’s power, and there had never been a proper sex between me and Sachiko as lovers.

I kept moving my hips, and only my muscles and time were consumed. I couldn’t feel the ejaculatory sensation rising. My penis was rock hard, and it should have been ready to ejaculate.

“Haa… An… Aah… Onii-san…”

The atmosphere was building up, and our movements became more intense, and it was about time for me to orgasm, but a conflict arose within me. Should I end it smoothly as usual and tell her that I was satisfied? Or should I honestly confess to Sachiko that I couldn’t ejaculate during sex with her?

“Sachiko… I’m going to cum…!”

I hugged Sachiko tightly and hit my hips hard while listening to her moans. The only way for me to ejaculate was to hear Sachiko’s moans, which were similar to Miyu’s.

It was no longer sex with Sachiko. I was still using my real sister as a sexual aid even while having sex with my lover. There was no way I could tell her, who was in the middle of sex, about this, and I finally ejaculated, looking at Sachiko’s voice and Miyu’s figure for just a few moments.

“Haa… Haa…”

“Onii-san… It’s amazing…”

It seemed that my all-out effort to ejaculate was connected to Sachiko’s pleasure. That’s why she had never complained to me. Although it’s just a word, what’s important is the spiritual connection. Even without any technique, if I made love to her as intensely as I could, the atmosphere alone would make her feel good.

Lying on the bed, naked and breathing heavily, were me and Sachiko. I wanted to ejaculate only thinking of Sachiko, but I couldn’t. It had been two weeks since I had asked Sachiko to be my girlfriend to get over my sister, and the knot in my heart had grown to the point where I couldn’t ignore it.

“I can’t do it tomorrow morning because I have to go to a cram school early, but what about the day after tomorrow? Do you want to have sex again?”

“I’ll call you again tomorrow and see how it goes.”

In this week, I had been searching for a way to ejaculate with only Sachiko. But I ended that day without being able to ejaculate without using my sister as a sexual aid even once.

I had been in a bad mood all week until Friday. At school, Suzuhara and Takanami were concerned about me, saying, “Hey, what’s wrong with you? Is something wrong?” And Yamamoto-san worried about me, saying, “Are you okay? Do you want me to squeeze your boobs?” in a tone that sounded like she would really let me do it, and I unconsciously refused.

Well, that’s natural because I have a girlfriend. I still can’t feel the sense of being lovers with Sachiko. We do get along well, and I don’t dislike any part of her.

I can’t concentrate on my love because of my sister’s influence. To put it in an otome-like expression, I didn’t have enough excitement. I knew that being able to get along well without it was the right way for a couple, but I needed a trigger to make me aware of Sachiko as a woman.

Sachiko, being innocent, never denied or resisted. If I asked her, she would do most things for me. Normally, that should be something to be grateful for, but for me, it was a source of worry because I had to make the trigger to change myself.

It’s a luxurious problem. I can have sex with such a cute girl as much as I want. If the past me met the me with such a ridiculous problem, he would punch me without hesitation. That’s how selfish I was, making such demands of both Sachiko and myself.

“I’m home.”

I opened the door to my house in a gloomy mood. The door wasn’t locked. Miyu had returned home. I could hear the sound of water running from the kitchen, and when I opened the living room door, there was Miyu, her hair tied up, doing the dishes.

Tokun— My heart beat with a loud sound. I was captivated by the sight of Miyu seriously scrubbing the dishes with a sponge in her hand. If we compared the beauty of their faces with Haruka and Yamamoto-san, Miyu and Sachiko shouldn’t be that different. And yet, no matter which moment I captured, Miyu was cuter than ever.

From her school uniform, she had changed into a casual outfit of a T-shirt and skirt for indoor use. Her white neck and rosy lips made my heart race. It was an emotion that a real brother who had a girlfriend shouldn’t have. I knew that it was something I should refrain from with my reason, but I couldn’t change the fact that Miyu was special to me as a member of the opposite sex.

“I’m home.”

Even when I spoke to her again, Miyu only replied with a bland “uh-huh.” She was so absorbed in washing the dishes, as if it was something more than just washing dishes. It was a concentration that seemed to be escaping from some other thoughts.

Miyu had her own life. Something might have happened at school. I looked at the summer vegetables simmering in the pot, opened the refrigerator, and took out a PET bottle. When I loosened the cap, a pleasant sound of “psshh” rang out. After the sweet smell of the carbonated drink, what tickled my nostrils was the floral scent wafting from Miyu’s hair.

It’s said that a girl’s scent is only the lingering scent of shampoo or perfume, but I believe that this is the unique scent of a girl. It has temperature, it contains pheromones, and it arouses the male’s instincts. My sexual desire easily surrendered to such a scent.

I was erect. I was so hard that I didn’t even feel sorry for having my penis rock hard behind Miyu. I wanted Miyu to treat me properly as a man. I wanted her to introduce me to a cute girlfriend. I wanted her to empty the house for sex. I had to repay my sister, who had done so much for me. I couldn’t fail, and I had to graduate from being a siscon and become a man who didn’t lust after his sister…

Perhaps it was this pressure that was making me mentally ill. It’s not uncommon for stress to cause dysfunction. The reason why my sex with Sachiko wasn’t going well was probably because of that.

So, maybe it would be better to just think, “I became a lover without even realizing it.” When I thought about it that way, the feeling of uneasiness that had been stuck in the depths of my chest seemed to disappear.

“How long will dinner be ready?”

“An hour.”

Her reply was abrupt. She must be in a really bad mood. The fire under the pot had been turned off, and a faint scent of spices came from inside. When I peeked at the display of the rice cooker, the timer had just started. Startled by the electronic sound, I ran out of the living room, leaving Miyu, who was washing the dishes with a blank expression.

“Haa… I’ll jerk off.”

I threw my uniform slacks into the bathroom and entered the toilet in a pathetic state, wearing only my shirt and underwear. The tip of my penis was wet, making my underwear bulge. I sat on the toilet seat, released my penis, and felt my mood rise as I began to masturbate. Today, I would use Miyu as a sexual aid. I imagined the situation where Miyu observed my ejaculation with that disappointed look, and my balls started to tingle.

My brain was filled with joy. I didn’t know if it was adrenaline or dopamine, but something dangerous was being secreted in large amounts. Although there was a voice in the depths of my consciousness that wondered if this was really okay, stopping at this point seemed to be causing an abnormality in my brain, so I decided to continue.

“Fuh… Kuh…”

The feeling of my hand wrapping around my penis was familiar. To be honest, I wanted Miyu to watch me and receive my ejaculation, but I couldn’t wish for that now that I had a girlfriend. After all, I got a girlfriend so that I wouldn’t have to do such things.

However, everything was too sudden. I should have taken more time and thought more carefully about getting over my sister.

“Haa… Ugh… This is bad… It feels good…”

It’s a common story that masturbation feels better than sex with a girl. When I only heard rumors about it, I couldn’t believe it, but now I understood. Even if you have a girlfriend, you need time for masturbation.

Miyu came in front of me, squatted with her skirt pressed down, and looked at my penis with good posture. She opened her mouth and stuck out her tongue, looking at the erect penis, which was dripping with pre-ejaculatory fluid. My brain clearly remembered the moisture inside her mouth, the amount of saliva left, and even the temperature of her breath.

“Miyu… Haa… Miyu…”

Just a few minutes after I started masturbating, my urethral opening was making a squelching sound. Although it was Miyu’s mouth that swallowed it, it was my penis that was drooling in anticipation of that moment.

I wanted to ejaculate. I wanted to ejaculate right now. My testicles rose, and the emergency production of sperm began. I wasn’t even going to ejaculate inside her vagina. Just imagining ejaculating into Miyu’s mouth, my brain was issuing an order to increase the amount of semen.

“Ah… Miyu… I’m… gonna cum…”

I moved my right hand up and down vigorously for the final sprint.

At that moment.

When I heard the sound of the doorknob turning, “Gacha,” I realized that I had forgotten to lock the door. I stretched out my hand in a hurry, but it was too late, and I made eye contact with Miyu, who was on the other side of the opened door. Her gaze, which was reflecting the light, shifted to my glans, which was glistening, and then, immediately after she recognized that I was masturbating, it changed to a sharp, piercing one.

“O… Onii-chan, what are you doing in such a place!”

I was scolded in a way I had never expected, and my thoughts became confused with excitement and surprise. Even if she was in a bad mood, she had never shouted at me like this before.

“Onii-chan’s… you dummy…!”

Miyu became teary-eyed, pressing the middle of her skirt tightly. I finally understood the seriousness of the situation from her figure, which was breathing roughly with her legs spread.

“Wa, sorry! I’ll get out of the way right away!”

Miyu wasn’t in a bad mood. She was holding her pee. She must have felt the urge to pee while cooking, and because it was troublesome to wipe the oil off her hands, she had been holding it in until the limit. After finishing washing the dishes, she rushed into the toilet, and when she saw that the door was unlocked, she must have felt relieved. But the sight that met her eyes was her brother occupying the toilet for masturbation, not even to relieve himself. The despair and hatred that Miyu felt were immeasurable.

Before I could stand up, Miyu had already taken off her pants. It was rare for Miyu, who rarely appeared naked even after taking a bath, to lower her pants in front of others. I had to empty the toilet bowl as soon as possible. Such a mutual urgency created a perfect fit of gears.

I tried to raise my waist from a forward-leaning position, but to keep my balance, I stepped forward. What was there was Miyu’s pants, which were still hanging on my ankle. At the moment I stepped on it, the worst scenario flashed through my mind. But when Miyu tripped over her own pants, it was already too late to change the outcome.

“Uwah… Wait…!”

I was pushed down onto the toilet seat by Miyu. Before I could feel the pain, Miyu fell on top of me, and we straddled the toilet seat facing each other.

We were both exposed. The rock-hard penis, wet with pre-ejaculatory fluid, was standing up, and there was even a risk of an insertion accident. The penis had entered Miyu’s T-shirt, and the pre-ejaculatory fluid was smeared on Miyu’s stomach.

Before I could apologize, I pushed Miyu’s shoulder. Miyu, who didn’t like skinship, couldn’t stand this state where such a delicate part was touching. But she didn’t move. Instead, she pushed her legs hard and hugged me with all her might.

“Mi, Miyu…!?”

I was completely stunned by the continuous surprises. Miyu was in a state of perfect adhesion, with her body pressed tightly against mine, her arm leaving a mark as she gripped it tightly, and her red face buried in my shoulder.

“Onii… chan… You idiot…?”

Miyu was desperately holding back the destruction of her bladder and pushing her body forward to secure a space to pee in case of the worst-case scenario. I also pulled back my waist, but I was already pushed back to the point where my back was against the toilet seat lid, and I couldn’t move.

Miyu’s stomach pressed against my penis, and the slippery sensation of the pre-ejaculatory fluid gave me a perfect massage of the frenulum. I wanted to be considerate of Miyu, who was subjected to the humiliation play of public urination.

“Miyu… any more… I can’t…!”

My penis, which had already been heightened to the point of ejaculation by masturbation, was now being pressed tightly against Miyu’s soft skin, and I was being pushed to the point where I couldn’t stop the premature ejaculation.