My Little Sister Is the Best F*p Material - Volume 3 Chapter 12: First Walk Home with a Girl and Then a Titty-Fuck Sex

Volume 3 Chapter 12: First Walk Home with a Girl, and Then a Titty-Fuck Sex

“—By the way, is my semen really that bad-tasting?”

In the archive room, after Yamamoto-san gave me a blowjob, I asked her about something that had been on my mind during our pillow talk-like conversation. Yamamoto-san managed to drink my semen, which Sachiko and Yuka couldn’t even swallow properly, but she could only do so by rinsing her mouth afterward.

“Huh?… Maybe you should try drinking it and see for yourself?”

Yamamoto-san’s response, with a blank expression on her face, sounded like something someone else had said to me. That’s true, but I still have a strong resistance to drinking my own semen.

“To be honest, the problem is more about the physiological disgust than the taste.”

Yamamoto-san, fixing her clothes that were disheveled after having sex with me, spoke seriously and calmly. It seemed like I had been described in a very harsh way, but everyone else had said it was disgusting, so it must be true.

“For example, if a real, live tadpole was put in your mouth, wouldn’t you reflexively spit it out?”

“Is it that bad?”

“In terms of difficulty to drink, yes. As for the taste, hmm…”

It seemed difficult to explain with words that didn’t cause any problems. So, in the future, will I only be able to have my semen drunk by Miyu or Yamamoto-san? If I get a girlfriend in college who doesn’t give me blowjobs, will I be able to continue dating her as a couple? Even if it’s not just for sex, compatibility is inevitable.

“What if, on a daily basis, you were asked to drink the semen that would normally be taken care of by the man concerned?”

“Do you like making people drink it?”

“Yeah.”

“I see.”

Yamamoto-san listened to me seriously and then smiled gently, her eyes narrowing as if she were in the bright sunlight.

“If it’s me, I’ll try my best.”

I was happy to hear the expected answer, and it felt frustratingly wonderful in the back of my throat. This is what being understood and supported must feel like.

“Yamamoto-san, you’re more like a girl who wants to serve others than a girl who’s just interested in sex.”

“I won’t deny either of those. All boys want to have sex with me, so that’s why I’ve ended up like this. That being said, I do like sex too.”

Even in this vulgar conversation, Yamamoto-san smiled at me without any reservations, and just talking to her made my heart flutter. The confidence of a girl who’s used to dealing with men is sexy in itself.

“That’s why…”

Yamamoto-san came closer to me again, and we faced each other at a distance where her chest, protruding from her blouse, almost touched mine.

“When you twitch your pants like that, I just want to make you come.”

I realized that my penis was half-erect as Yamamoto-san happily rubbed my slacks.

“Sotomichi-kun, your sex drive is crazy, huh?”

“It’s just my nature…”

“You want to ejaculate again after filling my mouth with that much semen. Do you want me to drink your semen every day with that kind of sex drive?”

“Ugh… S-sorry…”

Yamamoto-san scolded me, and as my penis gradually regained its hardness, she playfully stroked it. Yamamoto-san’s soft S-tendency resonated pleasantly with my masochistic penis.

“If that’s the case, I might have to convince myself that I’m your sex toy.”

Yamamoto-san teased me with a smile, as if she were okay with becoming that. Come to think of it, what I’ve been asking for is just that kind of request.

I wonder about Miyu. What does she think when she drinks my semen? I have to ask her about her true intentions before she can break away from being my sister and help me with my masturbation.

“Hey, Sotomichi-kun. Do you want to come inside me?”

Yamamoto-san unzipped my pants and then unbuttoned her blouse.

“You mean… you want to continue from before…?”

Yamamoto-san nodded, still eager to have sex. She was a girl who liked to serve others and was also a pervert who loved sex. That was Yamamoto-san’s true nature, and it was only because I could do both that she wanted to be friends with me. Having my penis, which hadn’t been used properly until now, rubbed while erect was a pleasure for Yamamoto-san as a woman.

“You want to titty-fuck me in my uniform, right? Well, today is the last day before summer break, so we should do it now.”

If it was just about doing it in uniform, we could have done it in my room. Yamamoto-san was trying to fulfill her desire for a shameful play at school. I don’t know how harsh words Miyu would have said to me, but Yamamoto-san was happily accepting this excessive desire of mine.

“Is it okay? Your clothes will be sticky with my semen, and you have to go home…”

“Nfu. You know that’s what you asked for, Sotomichi-kun. If my blouse gets stained with semen, I’m sure I’ll be recognized just by being talked to by someone I know. Then, my status at school will be ruined.”

Yamamoto-san came closer, her lips and breasts bouncing. In my field of vision, handjob had already begun.

“But, if you want to be squeezed by my tight breasts while I’m wearing my uniform… I also want to do it for you…”

I was invited in a way as if she wanted to be inseminated, and my sexual desire could no longer be stopped. My hands naturally reached for Yamamoto-san’s breasts, and every time I looked at her, she gave me a lewd look, saying, “Feel free to do whatever you want if you admit that you’re a pervert who wants to touch a girl’s breasts.”

I started to massage her breasts. From the bra cup, which was even bigger than Miyu’s, I could feel the weight of Yamamoto-san’s heavy breasts. Yamamoto-san looked very happy.

“Hehe. It’s already rock hard. It doesn’t feel like this is the second round.”

“I guess I’m asking for too much.”

“No, I think it’s okay. Your sexual desire gives me a sense of security.”

“Security? With this?”

Miyu must be anxious about when I’ll make her drink my semen. For Yamamoto-san, even with this much sexual desire, she feels secure. Yamamoto-san also seems to have more stamina than Miyu.

“Girls also feel happy when they can have sex when they want to. Sotomichi-kun is surprisingly gentlemanly or girl-oriented. It’s fun to have my release with you.”

Yamamoto-san stroked my penis with her index finger side down, and with her other hand, she caressed my testicles. Since I couldn’t ejaculate anyway, I could relax, but it would be extremely difficult to endure this pleasure without ejaculating.

“Also, no matter who it is, they always ejaculate completely with me on their first ejaculation. The sex ends quickly, and I’m left alone in a state of excitement, feeling very lonely.”

Men experience a so-called “wise man’s time” after ejaculation, where their sexual excitement subsides. Everyone is like that, so we have to be careful about the flow of sex, and ideally, we want to come at the same time as the girl.

When Yamamoto-san is the partner, ejaculation control becomes impossible. For Yamamoto-san, even though she was in the mood for sex, there was no way to deal with the excited atmosphere, which was the greatest pain in sex.

“So, I want you to rub me a lot and come inside me a lot.”

Yamamoto-san stuck her hand under her skirt and started to masturbate, rubbing her vagina in front of me. I had never seen such an erotic way of teasing. Miyu would never show me her masturbation.

“Umm… Should I… touch Yamamoto-san too…?”

“Nnh… Fuh, nfu. This is… not… that…”

As I got excited by Yamamoto-san’s provocative masturbation, she scooped up her love juice from her private parts and put it on her hand, then stroked my penis. She was preparing for the titty-fuck by using her own love juice as a lubricant.

“Nnh, ah… Yamamoto-san, this is too erotic…”

“This is a replacement for your pre-ejaculate, which makes your penis slippery. But, this will dry up soon so…”

Yamamoto-san added saliva to the love juice and made sure there was enough moisture for the penis, then she spread the hole of her breasts in front of my penis.

“Here, you can insert it now.”

It was efficient, meticulous, and erotic enough to make my penis restless.

This was the kind of release Yamamoto-san gave me. Her ex-boyfriends must have come at the love juice-handjob stage, and it even made me feel sorry for them. I never thought I would feel sympathy for the ex-boyfriend of a beautiful girl.

Sorry, but I’m not her boyfriend. But I will fully enjoy this one-sided titty-fuck using this beautiful girl’s breasts.

“I’m r-really going to come inside this…”

My penis, which was now covered in pre-ejaculate from the handjob, had become slippery enough to be inserted into the tight pressure of her breasts, and once the tip was in, the rest was surprisingly smooth, and it was sucked into the flesh.

In an unfamiliar position, I bent my knees and thrust my penis forward, pumping my waist. Yamamoto-san watched me with a caring look, and my anxious feelings calmed down, and I gained confidence in myself as a sex partner.

At that moment, I finally understood. Yamamoto-san accepted the titty-fuck cum inside her not just because she was a girl who liked sex, but because of her motherly nature, which didn’t care about the perversity of the act, and she was embracing my selfishness and my penis without reservation.

“Ahh, aahh… Aaahh… Yamamoto-san… It feels amazing…”

My penis was wrapped in her big breasts, and I became determined to piston harder as I felt the resilience of the twin hills when I hit them with my waist. My animal-like sexual desire to penetrate her breasts drove me forward, and Yamamoto-san was in a state of ecstasy with this rough sex that lacked any tenderness.

“Nnhh, ahh, it’s amazing, Sotomichi-kun… This is such a wild piston… It’s my first time…”

She was feeling it. Yamamoto-san was enjoying the erotic sensation of being rubbed between her cleavage during this selfish titty-fuck. Her words of praise, as if my clumsy piston was the best she had ever experienced, made me feel excited, even if they were just flattery.

Realizing that I was in a position to do whatever I wanted with this beautiful girl’s breasts, my sense of dominance and superiority as a man grew. However, I soon realized that this was all given to me by Yamamoto-san’s motherly nature, and my penis became more and more spoiled by her embrace.

“Nnhaa, ahh, aahh, Yamamoto-san… It’s good, it feels amazing…!! Rub me harder… Ahh, nnhaa, aahh… I’m about to come… I’m about to cum…!!”

“Nfu, here… Nnh… Rub as much as you like… Having sex with Sotomichi-kun with my breasts… It feels so good…”

I pumped my waist in a wide stance in front of Yamamoto-san, doing violence to her breasts. Like a bad brat whose sexual desire had grown, I rubbed my penis against her, and like a baby who demanded to be held after reaching his limit, I pressed my raging erection against Yamamoto-san’s breasts.

“Uuhh… Uhh… I’m really about to come… Is it okay? To come inside your clothes…?!”

“Ahh… Nfu… You shouldn’t ask a girl that…”

Yamamoto-san communicated with her eyes, “You know what I mean, right, Sotomichi-kun?”

That’s right. I shouldn’t be claiming that I can do perverted play at school or that I can make a mess of her uniform with my semen just because Yamamoto-san gave me permission.

Even if it’s a play that humiliates a girl, I must not make a girl feel embarrassed as a man. That’s because I’m having a titty-fuck done to me because I want to ejaculate.

Also, I’m at the limit of my patience for ejaculation, and my sexual desire is at its peak. Even if I’m told not to come now, I can’t stop. I’m going to rape Yamamoto-san’s breasts and ejaculate selfishly.

“Haah, aahh, aaaahh… Yamamoto-san… It’s amazing, it feels so good…! I’m going to come, I’m going to come a lot!!!”

“Anhh, aahh, haaah… No, my uniform will get dirty… Fun, nnnn… It’s so intense… My blouse will break…”

No matter if I push or pull, Yamamoto-san’s breasts cling to my penis. When I pull back, her breasts swell so much that the blouse seems to tear, and when I push in, the tip of my penis peeks out from between her cleavage, and the state of my penis is more clear than when it’s inside her vagina, making the titty-fuck even more lewd.

“I’m coming… I’m about to come…! I’m going to cum… Hold it, Yamamoto-san… Haah, haaah, aaaahh!!”

“Sotomichi-kun… Anhh, aahh, come… Comeee!!”

“Aaappuuh… Yamamoto-san…!! I’m going to come inside you… Aahh, ahh, I’m coming… I’m coming…!!”

Dupp, dupp, dobiruru, dokudoku, biru, bih, bibihuu–!!

While being compressed by Yamamoto-san’s breasts, my penis expanded and contracted, and the semen gushed out from my urethra with an endless sense of liberation. The semen that was ejaculated inside her breasts was pushed out by the pressure of her breasts, half of it climbing up between her cleavage like a spring, and the other half dripping down her abdomen like a trickle of clear water.

With the repeated ejaculations, the semen finally soaked Yamamoto-san’s blouse, and surely her skirt was also stained at her waist. As a man, I was filled with a sense of superiority equivalent to impregnating her. My excitement was so great that it overshadowed any sense of guilt for staining this beautiful girl with my genes. How much confidence as a man can I gain by having sex with Yamamoto-san? My expectations, which were immeasurable, turned into my feelings for Yamamoto-san.

“It’s so… hot…”

Yamamoto-san felt the pulsation of my penis, which was still throbbing in the wet cleavage, and even though her erogenous zones weren’t being touched, she seemed to be lightly coming. Her appearance somehow overlapped with Miyu from last night. I was anxious, but I also felt that I was able to come easily with this titty-fuck because of the sex I had with Miyu.

Still, today’s sex with Yamamoto-san gave me a sense of relief that surpassed that. With Yamamoto-san, I can graduate from being a sister. With that conviction, I looked at Yamamoto-san’s face, and she looked back at me with a hot gaze.

“Sotomichi-kun.”

Yamamoto-san stood up, holding her breasts to show off the semen that had risen between her cleavage, and then she made me realize the mistake I had made, and she held my hand in a lover’s handhold.

“You’ve made a girl this dirty. You’ll take responsibility for it, right?”

Then, Yamamoto-san whispered her request in my ear, and I agreed, and we left the room together.

After I returned the key to the archive room, we snuck out of the school building so no one would notice, and then Yamamoto-san and I held hands and went home together, acting like a couple, all lovey-dovey.