My Little Sister Is the Best F*p Material

Volume 4 Chapter 9: Sex Like a Virgin

It was a summer afternoon in the midst of the vacation. I lay on the bed, staring at the box of condoms.

The number on the box read ‘0.01’. It was the thinnest condom Miyu had made me use before, promising the most realistic insertion sensation. However, this wasn’t my choice.

Last night, as I held hands with Yamamoto-san and went to buy condoms, she watched from behind as I chose which rubber to buy. Of course, I wanted to pick the thinnest one from the start, but I was afraid it would make me seem too eager, so I picked a slightly thicker one and took it to the register.

But just before checkout, Yamamoto-san tapped my back and stopped me. Then, with a flushed cheek, she suggested, “Let’s get this one,” pointing to the thinnest condom. I still remember Yamamoto-san’s girlish cuteness and the cashier’s murderous gaze.

“Sotomichi-kun, I’m ready, come on over.”

Yamamoto-san texted me before it got dark outside. It seemed her part-time job ended after cleaning up after lunch.

I got ready and left the house. With my overnight bag in the basket, I wobbled my bike towards Yamamoto-san’s apartment. Even though I’d only been there a few times, I was already familiar with the route.

Today was the day I’d finally have sex with Yamamoto-san. I wanted to fulfill her long-unfulfilled wish—to have sex that would satisfy her, the all-capable Yamamoto-san.

Arriving at the apartment, I entered the entrance code for Yamamoto-san’s room and pressed the intercom. My throat felt dry, unrelated to the summer heat. My pulse raced, unrelated to the bike ride.

“I’ll open the door. The room’s unlocked, come on in when you arrive.”

I entered the automatic door, took the elevator, and headed to Yamamoto-san’s room. In the stuffy elevator, with only the hum of the air conditioner, I watched the floor numbers increase one by one.

(Is it enough for me to just offer my body like this…?)

I suddenly thought. What Yamamoto-san wanted most was to have sex with a man who wouldn’t ejaculate inside her immediately, to enjoy a lengthy session and feel good. Yet, something felt off. Interpreting Yamamoto-san’s “I want sex” as “I want to feel good” didn’t sit right with me.

Of course, I planned to have sex with Yamamoto-san carefully and slowly, to satisfy her. Or maybe, being Yamamoto-san, she’d want me to thrust vigorously for dozens of minutes. I’d held back on muscle training for today, so I should be able to meet her expectations, at least at first.

But even so, I couldn’t picture Yamamoto-san being satisfied. Long insertion alone wasn’t enough. Miyu said she could be satisfied without orgasming, but surely any girl would want to orgasm during sex.

Had Yamamoto-san ever orgasmed? Come to think of it, I’d never made a girl orgasm. Sachiko’s orgasms were ultimately from Miyu’s memories. And with Yuka—she seemed to orgasm, but that was a special situation, and more influenced by Miyu forcing it.

Lost in these thoughts, I arrived at Yamamoto-san’s door. The key was unlocked, so opening this door would start our time together. What happens, happens.

“Coming in.”

As soon as I opened the door, I saw the kitchen to the left of the long hallway. The moment I stepped inside, the fragrant aroma of spices stimulated my senses.

“Welcome, Sotomichi-kun.”

Yamamoto-san greeted me, stirring a pot. Wearing a summer knit and an apron, her ample chest was clearly visible. Her domestic appearance was so erotic I almost forgot what I’d been thinking about.

“Is that… beef stew?”

I asked, and Yamamoto-san smiled, making an OK sign.

“Solid rice would make my stomach uncomfortable during sex. Stew can be easily reheated with bread, so I’m preparing it now.”

Beef stew, huh. The last time Miyu teased me, it was also with stew. Miyu’s always been dry, unlike Yamamoto-san, never directly initiating sex, but she’d unexpectedly invade my personal space, naturally leading me to do strange things. Since then, our physical contact has become more intimate, even allowing hugs. If I asked, she’d even give me a handjob.

…Wait, now’s not the time to think about Miyu. I’m about to have unrestrained sex with this cute, erotic girl. I should be happy about that first.

“If you’re hungry, you can eat now.”

Yamamoto-san turned off the stove and took the bag from my hand.

“Whether it’s food or a bath, it’s up to you.”

Then, Yamamoto-san placed my bag on the nearby floor and moved closer. Her slender fingers traced my body, stopping at my pants’ zipper.

“Or, do you want a blowjob?”

At the sudden sexual suggestion, my groin stirred, swelling. The now-familiar immediate blowjob. My body, already accustomed to Yamamoto-san’s pleasure torture, couldn’t resist.

“Maybe a blowjob.”

“Hehe, as you wish.”

Yamamoto-san freed my erection from my tight pants. She didn’t tell me to take it out myself this time, fully in service mode.

Still wearing shoes in the entryway, I watched as Yamamoto-san, kneeling, looked up at me. The outline of her chest visible through her knitwear intensely stimulated my lust.

“Mmmph!”

Without hesitation, Yamamoto-san took my penis into her mouth. She made wet sounds, licking eagerly to the base.

“Ah… ugh… Yamamoto-san’s mouth… it’s amazing…!”

Yamamoto-san’s mouth is always warm and filled with saliva. When I was still using erotic games, I heard that warming an onahole and filling it with plenty of lube would make it the ultimate flesh hole, so I tried it. But Yamamoto-san’s blowjob felt more real than any tool, like a child’s toy in comparison.

“Mmph, is it good?”

Yamamoto-san never looks displeased while giving head. Instead, she seems to savor it, licking every inch.

“It feels so good… I might be satisfied with just the blowjob…”

This was the fourth time Yamamoto-san had given me oral—first in the school archives, then a paizuri blowjob on the sofa, yesterday on the bus, and now this immediate blowjob upon arrival.

“Uh… by the way, Yamamoto-san… do you prefer it before I wash…?”

Yamamoto-san seems more enthusiastic about giving head outdoors, without preparation. Despite the smell of sweat and semen, and possibly even urine, she eagerly licks it all up.

“Mmm, chup… it’s not that I like licking something dirty… mmm, churu…”

Yamamoto-san, still sucking my penis, ran her tongue along the shaft, sucking up saliva.

“Licking it like this makes Sotomichi-kun happy, so I like it.”

Yamamoto-san smiled and resumed her blowjob.

Just because it makes me happy… that’s so heartwarming. I felt like I might ejaculate from that happiness alone.

“Mmm… chubu… nchu… ah… But this bag has my suit in it. It might get wrinkled.”

Yamamoto-san released my penis from her mouth, turning her attention to my bag on the floor. Inside was my work suit and overnight clothes.

“Don’t worry too much. Event staff suits are basically workwear, meant to be worn out.”

“Even so. A woman can’t send a man to work looking shabby.”

Yamamoto-san pushed my penis back into my pants, zipping it up. “It’s on hold,” she said.

Then, she sent me to the bathroom to shower while she organized my bag.

“Haa.”

Again, overwhelmed by pleasure, I could only think about erotic things. Yamamoto-san’s blowjob felt too good, and seeing her enjoy it so much made me think that maybe this was enough.

Even as I showered, my erection remained firm. Since I came here for sex, this state wasn’t dishonest, but thinking about sex constantly might be an issue. I still didn’t know enough about Miyu or Yamamoto-san as women before having sex with them. I needed to think more about what Yamamoto-san truly wanted.

After showering, I dried my body. Not wanting to use Yamamoto-san’s bed with wet clothes, I dried my hair before getting dressed. My hair, properly cut at the salon, looked decent even without wax.

In the mirror, my reflection looked unbelievably normal compared to a few months ago. I’d gained muscle, my posture improved, and like my cute sister Miyu, my facial features weren’t bad.

…Or so I thought. But my plain, gloomy appearance was probably due to my heavy, single eyelids. If I could just remove the excess flesh and skin around my eyes, I might have a decent face. Thinking this while still naked, I was startled to find Yamamoto-san peeking through the door.

“Ah, Yamamoto-san… what are you…?”

“Just watching a naked guy staring at his face in the mirror with a full erection.”

I was still erect while looking at my face. Mortifying.

“Don’t worry, Sotomichi-kun is handsome.”

Yamamoto-san entered the changing room, wrapping her arms around my naked body from behind. The warmth of her soft knitwear and her body felt comforting.

“You’re still hard. Were you thinking about something erotic while showering?”

“It’s just… lately, once I get hard… it doesn’t go down easily…”

“I see.”

Yamamoto-san stroked my upward-pointing erection. With one hand on my lower body, her fingers gently stimulated my thighs, testicles, and penis, sending tingling pleasure throughout.

“Nnh, fuh, agh… wait, that… ahh…”

The pleasure made my back arch. My testicles twitched, and the intense ejaculation sensation surged through my urethra, enough to make any man orgasm.

“This started since you’ve been having intimate moments with Miyu-chan, you naughty brother.”

Yamamoto-san switched from caressing to handjob. Her right hand gripped my shaft, her left supported my testicles, stimulating me from both top and bottom.

My body, overwhelmed with pleasure, twitched with each pulse. In the mirror before me, I saw a pathetic man, naked and moaning under a girl’s pleasure torture. Yamamoto-san held me tightly, ensuring I couldn’t escape, showing me this sight.

“I said you’re handsome, but…”

Yamamoto-san’s hand movements intensified. With each stroke, her fingers targeted my most sensitive spots.

“Ahh, ugh, aahh!”

Even as I tried to pull away from the pleasure, Yamamoto-san pursued, her arm reaching deep. Stimulating from my testicles to the base of my penis, she precisely hit every sensitive spot, intensifying my sensations.

“I prefer you moaning pathetically like this.”

She focused on my wet, pre-cum tipped penis. I couldn’t stand, my legs and waist trembling, unable to escape Yamamoto-san’s handjob.

“Even on the train, you were like this. Did it feel good?”

Yamamoto-san’s sultry voice whispered in my ear, the sound vibrating my eardrums, sending sexual signals to my brain.

“Haa, augh, it’s so good… haa, aahh…!”

Yamamoto-san pressed her cheek against mine, turning my face towards the mirror. It reflected a man melted by a woman’s pleasure, pathetic and moaning.

“Want to watch yourself getting a blowjob?”

Without waiting for my reply, Yamamoto-san turned sideways and knelt.

She took my penis, still wet from the intense handjob, into her mouth. My hard, upward-pointing penis disappeared into her lips, reaching deep into her throat. With each wet sound, her cheeks puffed and deflated, and as my penis reached her throat, she swallowed, tightening her throat around the tip.

“Aahh, ugh, aahh, ugh, aahh!!”

I couldn’t hold back my voice. Yamamoto-san’s mouth was already so fleshy and moist, and with her entire mouth used for the blowjob, there was no way I could stay calm.

“Hehe, I’ll take mine off too.”

Yamamoto-san slowed her fellatio strokes, making the rhythm more relaxed, ensuring the pleasure didn’t fade as she removed her clothes. While her clothed fellatio was already incredibly erotic, seeing her fleshy body heightened my excitement.

From the side, Yamamoto-san’s breasts defied gravity, jiggling with each bob of my head as she took my penis into her mouth. Her fair skin emphasized the softness of her body, and the way she tucked her hair behind her ears to reveal her lips added a sultry touch, reflected alluringly in the mirror.

“Ah, ugh… Yamamoto-san… I want to cum…”

I wanted to watch Yamamoto-san’s face as she took my semen into her mouth, seeing the moment it was poured in.

“Mmm… chubu. Not yet, maybe next time.”

Unfortunately, she didn’t allow me to ejaculate in her mouth. Since she said it was okay to cum whenever I wanted, she probably would have accepted it, but today’s main goal was sex, so I couldn’t cum here.

“I’ve made it pretty wet with saliva, so rinse off lightly and come to bed. You don’t need to wear clothes, right?”

“Ah… yeah…”

Yamamoto-san took the clothes she’d removed and the ones I’d planned to wear after showering, heading to the living room. Going to bed naked meant we’d have sex right away. I needed to prepare myself mentally while showering.

I washed my lower body in the shower and headed to Yamamoto-san’s bed. Opening the door, I saw the bed in the ten-tatami mat room to the right. There, Yamamoto-san lay on her side, covered by the futon.

“Phew, nnh… Sotomichi-kun, good work.”

“Yamamoto-san, good work on your part-time job too. Thanks for the meal and suit.”

“Uh… it’s okay…”

Yamamoto-san’s gaze fixed on my still-erect penis. I could tell she was thinking, “It’s still hard.” Embarrassing, but if I waited for it to subside, the mood would fade. I had to brace myself.

“Ah… nnh… haa…”

Naked under the futon, Yamamoto-san squirmed, her face flushed. Her breathing was deeper than usual, her exhales hot.

“Yamamoto-san… what are you doing…?”

I knew what she was doing, though I’d only seen it online. She was masturbating. Why now?

“Uh, I’m… preparing for… sex…”

Even with me there, Yamamoto-san continued masturbating. Her movements made my groin twitch, and I felt embarrassed.

I’d rarely done foreplay, so her taking the initiative helped. But with Miyu and now Yamamoto-san, it seemed they didn’t like being touched by men.

“Nnah… ah, nnh… I want to see you do it too…”

Yamamoto-san’s request was subtle but insistent. She stared at me, waiting for me to start.

That was her goal. I couldn’t refuse. But it was unfair—she was under the futon while I stood naked.

“Then I want to see you do it too, properly.”

Few men with girlfriends get to see a girl masturbate live. If Yamamoto-san wanted us to show each other, I wanted to see her entire body.

“…Okay. Keep going, and remove the futon.”

Yamamoto-san didn’t stop touching herself, asking me to uncover her. Exposing her private act felt wrong, but it was part of what she wanted. I couldn’t disappoint her.

I approached the bed, lifting the futon. My erect penis neared her face, making me feel guilty, but I revealed her masturbating body.

“Uuu… haa… so embarrassing…”

Despite asking me to remove the futon, Yamamoto-san shrank in shame, still touching herself. Her unclear mix of innocence and lust stirred an indescribable excitement.

“Anh… ugh… Sotomichi-kun, hurry…”

Yamamoto-san’s desperate voice urged me to start. Her legs spread wide, her fingers moving obscenely on her clitoris.

“Uh, kuh… Yamamoto-san…”

I began stroking my penis. With each stroke, blood rushed to my shaft. Standing there, pitifully stroking myself, I was watched intently by Yamamoto-san. Did my pathetic appearance excite her that much? Her preferences were certainly unique.

“Haa, ahh… Yamamoto-san… it feels so good…!”

Just being watched by her heightened the sensation.

But this was a mistake.

“Ugh, ah, ahh…!”

Within a minute, I was overwhelmed by the urge to ejaculate. Panicking, I stopped and gripped the base of my penis. My lower body muscles contracted as if ejaculating, and the sensation finally subsided without release.

“Nnh…? What’s wrong, Sotomichi-kun…?”

Yamamoto-san looked puzzled as I stopped abruptly.

What should I do? I couldn’t masturbate.

Of course—masturbating in front of a girl was what I’d done most with Miyu.

With my fully erect penis, Yamamoto-san’s face was right there. If I said I was about to ejaculate, she’d probably open her mouth to catch it. It was the same act I’d done with Miyu. My body wouldn’t hesitate to cum.

“Ah, I mean, it’s just… a bit embarrassing.”

I stammered an excuse, ruining the mood, but I couldn’t control myself if I kept going.

“Is that so? Well, I get it, I guess.”

Yamamoto-san stopped too, gently pinching my penis with her wet fingers.

“But you’re rock hard, veins bulging…”

“Ugh… this is…”

My already hard erection swelled further, clearly larger than before. It felt hotter than ever.

“Hmm. I see.”

Yamamoto-san narrowed her eyes, observing me. I couldn’t deceive her in this state.

“You do this with Miyu-chan.”

She concluded with a satisfied expression.

I couldn’t deny it anymore.

“This is… ah… that…”

As I stumbled, Yamamoto-san gripped my penis, lightly rubbing it. The residual arousal made me feel like I might cum from that alone.

“Sotomichi-kun is a pervert who only masturbates in front of his sister.”

Yamamoto-san’s eyes narrowed, accusingly. I had no defense.

“I wondered how you had sex without intercourse. So, you like masturbating in front of Miyu-chan.”

My fetish was exposed. It didn’t bother me that Yamamoto-san knew, but hearing it aloud brought shame and guilt.

“I, well… it’s complicated…”

“Hehe. I won’t pry too much.”

Yamamoto-san playfully stroked my penis, not pushing me to ejaculate. It seemed she wasn’t disgusted. I wondered what level of perversion would make her dislike me.

“Want to cum?”

“Well… I do, but…”

When Yamamoto-san made me ejaculate in her mouth on the bus, she looked like she’d swallowed something bitter afterward. If I made her drink semen from masturbating like I did with Miyu, she might actually throw up this time.

“But you want to have actual sex, right?”

I could ejaculate multiple times now, but regaining an erection afterward required significant excitement, meaning Yamamoto-san would have to please me again. I didn’t want to rush things, but I wanted to ensure we had sex when we could.

“Umm… I’m fine either way…”

Yamamoto-san muttered, releasing my penis.

Fine either way? But the flow suggested now was the time. If we didn’t have sex, I’d definitely want to ejaculate somewhere.

“Uh, so, should we… do it…?”

“Yeah. Let’s do it.”

Yamamoto-san lay back on the bed, seeming to go along with my suggestion. I took the condom box from my bag near the closet. Opening it, I saw three condoms inside.

Carefully tearing the packaging, I checked the orientation, ensuring the sperm reservoir was on top. As I lay on the bed, caressing Yamamoto-san’s breasts, I unrolled the condom over my erect penis, making sure it was fully covered.

Yamamoto-san kept her legs folded, knees raised, hiding her privates. When I lowered my waist and placed my hands on her knees, she opened her legs, accepting me.

The once cheerful atmosphere turned silent.

“Can I enter?”

“…Go ahead.”

Yamamoto-san only nodded, her face turned toward the wall.

I lifted her legs, moving closer. Her honey pot, filled with amorous juices, was just centimeters away from my entry.

“Uh… wait…”

Something felt off. Yamamoto-san was too quiet. Had I said something to ruin the mood? Was suggesting sex at that moment a mistake?

No, wait. What did “fine either way” mean? Even if I enjoyed our time together, this relationship started because Yamamoto-san wanted sex with me. Until yesterday, we’d been eager to do it.

The last time I was here, we were supposed to have sex. Yet Yamamoto-san showed no interest, and after I ejaculated from a handjob and paizuri, she seemed satisfied.

This strange, familiar feeling. It was like being with Miyu. While girls can be complicated, Yamamoto-san was human too, and her silence must have meant something.

This situation is somewhat similar to when Miyu barged into the bathroom. Back then, Miyu’s unreasonable behavior had a purpose—to punish me. So, what does Yamamoto-san’s silence mean now?

“Sotomichi-kun…? What’s wrong?”

Yamamoto-san tilted her head, confused by my hesitation. I couldn’t say, “I can’t enter because you’re quiet,” as it might make her feel self-conscious. How could I convey my confusion?

“Uh… I mean… maybe I should say something to set the mood…”

My thoughts were scattered, and my words lacked atmosphere.

“Hmm? Hehe. You’ll say something for me?”

Yamamoto-san smiled faintly, her expression softening.

“Uh… well… I mean…”

Without thinking, I struggled for words. I just wanted to ease the tension.

“…I see.”

Yamamoto-san nodded, reaching out to wrap her arms around my head, pulling my face into her chest.

Her breasts were incredibly soft and warm. I could hear her rapid heartbeat without even listening closely. Her pulse was unusually fast, her body flushed like after exercise. Could it be…

“Yamamoto-san… are you nervous?”

Her sudden silence and previous delays in having sex—was it just nervousness?

“Embarrassingly…”

Thinking about it, her nervousness was understandable. Her past failures with sex were a serious concern, and even knowing I wouldn’t ejaculate, she must have been anxious.

I paused the sex, holding her instead. Our thighs pressed together, our privates touching without penetration. Her wetness made even the slight contact with my penis feel good.

“Sotomichi-kun, you’re so hard. Our body temperatures should be the same, but you feel hot. It’s… amazing…”

Compared to average, my penis wasn’t extraordinary. Miyu and Yamamoto-san were just too appealing, awakening my primal instincts.

“Nnh… if you keep twitching like that… phew… nnh… it feels so good…”

My penis, influenced by Yamamoto-san’s allure, was ready for sex beyond my control. I couldn’t stop it. What should I do? My body ached with desire.

“Yamamoto-san… I… I want to have sex…”

Just being wrapped in her naked body heightened my arousal. The lust I’d been feeling since earlier was overwhelming.

“Sotomichi-kun.”

Yamamoto-san hugged me tightly, then released me.

“I want you to enter me too.”

Her moist eyes.

Finally, I heard those words.

“Yamamoto-san… here I go…”

I pressed the tip of my penis against her entrance, slowly entering.

“Nnh… ahh… Sotomichi-kun…!!”

My penis pushed through her tight, yet soft walls. Her vagina was narrower than I’d imagined, but with no resistance.

“Ugh… haa, Yamamoto-san…! Ah, this feels too good…!!”

As my penis reached the deepest point, my body trembled. Her vaginal walls clung to my penis, squeezing it. With each thrust, her vagina loosened, and every part of my shaft was enveloped by her soft flesh.

“Ahh… it’s… I’m about to cum…!!”

Unexpectedly, I was on the verge of ejaculating. I thought I could only cum with Miyu, but I was close to the edge.

“Nnh… it’s okay… cum…”

Yamamoto-san held me, accepting my potential release. Even though I might become like other men if I ejaculated.

“Ahh… Yamamoto-san… Yamamoto-san…!!”

I moved my hips frantically. My penis made lewd sounds, stirring her juices. Feeling my hardness inside her filled my mind with joy. After about ten seconds, I slowly slowed my thrusts.

“Haa… haa… I… didn’t cum…”

“Phew… I see… that’s too bad.”

Yamamoto-san’s breathing was heavy, and I held her again. I thought I’d definitely cum, but my body wouldn’t release for anyone but Miyu.

“But now we can keep going.”

I gradually resumed thrusting. Earlier, thinking I might cum, I’d been too rough. Yamamoto-san, with less experience than most girls, didn’t deserve such rough sex.

“Was it painful?”

“I’m fine. But I prefer it slow like this.”

Yamamoto-san relaxed, accepting my penis.

“Nnh… ahh…”

This pace seemed to please her more. For me, the slower pace let me feel her vagina more deeply.

“Yamamoto-san… how long should I keep it slow…?”

“Uhh, ah, hah… if you’re okay with it… ah, ahn, haa… I want this forever…”

Yamamoto-san’s moans became higher-pitched, even with the same rhythm.

“Aahn, ah, right there… it feels so good… haa… nnh…!!”

The depth of my thrusts affected her reactions. Her vagina tightened as she felt more pleasure. I kept the pace steady, adjusting only the depth of my thrusts.

“Hau, naah, that’s good… aaahn…! Your hardness feels amazing… ugh… aah… nnh, nnh, nnuu!”

Despite the slow pace, Yamamoto-san’s reactions intensified. She moaned clearly when my penis hit the right spot, and I focused on stimulating her. Her clinging to me showed how much she desired me. The mental pleasure as a man enhanced the physical pleasure.

“Auh… ah…! Sotomichi… kun…”

Eventually, Yamamoto-san’s moans softened, but her grip tightened. Each thrust near her cervix made her body jerk, tightening her embrace. When her movements stopped, and she just held me, her body began to spasm violently.

“Ah… phew… nnh… haa, haa… sorry…”

Noticing her climax, I stopped.

Yamamoto-san looked embarrassed, muttering softly.

“I… just came.”

She pulled the futon over her face, hiding.

“Uuu… so embarrassing…”

She seemed troubled. Despite her boldness in erotic acts, she was shy about climaxing.

“I’m not developed at all… to come so easily… it’s indecent…”

Her past acts seemed more indecent. Seeing herself so aroused was too shameful. Usually dominant Yamamoto-san, embarrassed and shrinking, was adorable.

I waited for her to calm down. She squirmed under the futon, still embarrassed. After about five minutes, she peeked out, glaring at me, then looked away.

“Sotomichi-kun’s movement is too good.”

I never expected such words from a girl. This was Yamamoto-san’s first proper sex with a man. So…

“Was this your first time… coming?”

“Yeah.”

No man had lasted more than a few seconds with her. It was natural for this to be her first time. I’d made her climax. I could be proud of that.

“Sotomichi-kun, this…”

Yamamoto-san touched my still-erect penis.

“It’s impressive.”

My penis, throbbing with erection. Its hardness was impressive compared to others.

“Is it…? It’s not that big. Before Miyu, I didn’t get this hard… and my ejaculate was much less…”

I’d changed in the past few months. When I only used erotic games, sometimes I couldn’t even get fully erect before ejaculating.

“So this is thanks to Miyu-chan.”

Yamamoto-san stroked the base of my penis, gazing at our connection.

“Miyu-chan’s traveling, right? When’s she coming back?”

The relaxed atmosphere led to casual conversation. With Yamamoto-san having climaxed, we took a break.

“She said a week, so she’ll be back in four days.”

I withdrew my penis, watching her love juices drip down her thighs. Even Yamamoto-san looked embarrassed, crossing her legs.

“Sotomichi-kun has work the day after tomorrow, right? What about after that?”

“I have one more shift in five days.”

“So until Miyu-chan returns, you only work the day after tomorrow.”

“That’s right.”

I could have taken more shifts, but I didn’t want to overdo it at the start of summer vacation.

“Sotomichi-kun…”

Yamamoto-san changed the subject, looking into my eyes.

“You don’t need to be able to have sex with anyone but Miyu-chan.”

Her words took a moment to register.

“Huh? Why not?”

I thought I’d done well. I was on the verge of ejaculating during our last session, and I felt hopeful about being able to ejaculate with Yamamoto-san. But if she’s saying I should stick with Miyu, does that mean I should continue having those moments with Miyu?

“From what I’ve experienced today, I realize that I always feel Miyu-chan’s presence within you.”

Yamamoto-san continued in a calm tone.

“You say Miyu-chan doesn’t like you, but… maybe not now, but I think the changes in you are proof of her love.”

The love between me and Miyu. It’s true that if Miyu hadn’t accepted me, nothing would have started.

Without her, I’d still be a gloomy virgin, jealous of Suzuhara and Takanami, probably ending up alone.

“Having you inside me, I’m sure of it. You should continue to cherish Miyu-chan.”

Yamamoto-san smiled mischievously.

“Is that okay?”

“It’s fine. You’ve become so impressive. Be more confident.”

Yamamoto-san stroked my still-hard penis.

In the end, even with Yamamoto-san, I couldn’t ejaculate. But the issue wasn’t just that.

At yesterday’s drinking party with Agyou and the others, I realized something. Despite having such enjoyable sex with Yamamoto-san, I still didn’t feel romantic love for her. It’s because my instincts told me no one could match Miyu.

“So, I’ve decided to enjoy sex with you for the remaining four days.”

Yamamoto-san’s expression brightened. She asked about Miyu’s return date for this reason.

“Are you sure about that?”

From my perspective, since I’d continue with Miyu, I’d focus on our relationship. But Yamamoto-san can’t have proper sex with anyone else, and ending it here would be tough for her.

“It’s fine. I just realized something—you’re mistaken.”

“Mistaken?”

I must have misunderstood her concerns.

“I’ve always said I wanted sex, but it wasn’t about sex itself.”

She wanted a healthy relationship with a man, leading to sex. Her struggle was about not having that normalcy. So, wasn’t it about wanting sex?

“Now, I want sex with you because I enjoy being with you. It’s fun, so I want more.”

Yamamoto-san said this shyly.

“I’m glad to hear that, but…”

It’s a man’s greatest honor to be desired for sex because of enjoyable intimacy. But if her struggle wasn’t about sex, what were her previous requests about?

“Let me explain properly. First, let’s do it again.”

Yamamoto-san lightly pulled my erect penis, asking for more.

“This time, I want you underneath.”

She got up, posing like a femme fatale, instructing me to lie down. Seeing her so happy, her advice to choose Miyu must have been for the best.

“Just lie still?”

“Preferably, be a dead weight.”

“Really…?”

I never thought a girl would ask me to be a dead weight. With Yamamoto-san, it’s acceptable.

I lay on the bed, relaxing completely. Yamamoto-san straddled my waist, guiding my penis to her entrance. Without hesitation, she lowered herself, taking me to the base.

“Ugh… ugh… this… nnh, ahh… I love it…!”

Yamamoto-san didn’t move much, just grinding her hips, pressing my penis against her sweet spot.

“Ahh… Yamamoto-san…! That… feels… aahh!”

I resisted moving my hips, surrendering to her pleasuring. Her dedication to pleasing me meant I shouldn’t interfere. I wanted to enjoy her efforts.

“Haa… haa… your hardness is amazing…”

Yamamoto-san seemed to love my hardness. Previously, men would ejaculate quickly, leaving her unsatisfied. With her moving freely, our pleasure synchronized, our emotions merging completely in that moment.

“Phew… nnh… I never knew sex could feel this good… Maybe I’ll stay with you until the last moment.”

Yamamoto-san stopped, picking up her phone from the bed.

“Yamamoto-san…?”

She tapped the screen a few times, holding the speaker to her ear.

Undoubtedly, she was calling someone while I was still inside her.

“Good evening, this is Yamamoto. I’d like to discuss my shift for this week.”

She was calling her part-time job. She seemed to have a shift on the last day we planned to have sex.

“Yes, I’m sorry. I have a very important appointment…

She caressed her stomach, gazing at our connection, placing her finger on her lips, and sinking deeply with a wet sound.

“Ugh… Yamamoto-san…!”

The tension heightened my sensitivity. Her vaginal movements alone made me want to moan.

“Yes… I think I can work next week. Phew… nnh… thank you.”

She hung up, throwing the phone aside, and leaned over me.

“Was it okay to skip work?”

“Not really.”

“Huh?”

What are you doing, Yamamoto-san?

“I just called in to cancel my shift. It was a full-time slot, so finding a replacement will be tough. This time of year, it’s busy with fewer people.”

She spoke casually about her actions. Then, smiling mischievously, she looked down at me.

“Oops. Sex with you feels too good, it’s making me naughty.”

Her expression was both troubled and joyful, showing that nothing was more important to her than being with me.

“Nnh… ahh… Sotomichi-kun…!”

She started moving again, resuming our sex.

“Yamamoto-san… ugh… your insides are so wet… it’s unbelievably good…!”

Inside her perfectly developed body, I maintained my hardness without ejaculating. This was something only I could do, something unique to me. My body was useful to her. I was helping her as a man.

“Hehe. I’ll make it even better.”

Yamamoto-san curled slightly, starting to lick around my chest.

“Ah… that’s… dangerous! Nnh, naah, don’t…!”

I knew her intention—to heighten my sensitivity by licking my nipples.

“What’s dangerous? I did it before.”

She avoided the tip, teasing the outer edges. It didn’t take long for her to realize my “dangerous” meant I was close to ejaculating.

“Miyu-chan played with them too. You two are close.”

Yamamoto-san wasn’t surprised by my intimacy with Miyu. Even if I were developed anally, she’d see it as a sign of love.

“So this is your ejaculation switch.”

She happily licked around my chest.

“Ugh… aah… that’s… ah, but I want to cum…!”

I was at my limit.

“Want to cum? Say, ‘Please let me cum, I beg you,’ and I’ll let you.”

“Haa, aah… please… let me… ugh, mmm…!?”

Just as I was about to speak, she covered my mouth with her breast. The soft flesh muffled my voice, making breathing difficult.

“Nnh, ugh…!!”

“Haa, nnh… ah, aah… you like breasts so much… haa, aah… nnh, aah… I’m… about to cum again…!”

Yamamoto-san found my sweet spot, thrusting deeply, moving frantically. The increased sensation made me think only of ejaculating.

“Let’s cum together…!! Juu, jubu, jururu…!”

As soon as her breast left my mouth, she sucked on my nipple. My chest was overwhelmed by her tongue, my lower body by her movements, pleasure coursing through me.

“Nchu, Sotomichi-kun, nnh! I’m cumming, nnh, nnnn──!!”

“Yamamoto-san… aah, ah, Yamamoto-san…! Aah, ugh, aaaaahh!!”

Dobyu, doku, dobu, dobyuru, byukubyuku, byu, byuru──!!

As Yamamoto-san climaxed, her contracting vagina triggered my ejaculation. Post-orgasm, my body felt lethargic. My penis, withdrawn from her, had a condom swollen with semen, nearly bursting.

Yamamoto-san removed the condom, tied it, and threw it into the nearby trash bin. She then collapsed onto me, her weight a testament to our intimacy. Though not physically exhausted, the new experience of orgasm left her mentally drained. Her height and build gave her a substantial weight, reminding me of our shared moment.

“Haa… phew… I thought coming would be refreshing, but it’s… dazing…”

Her breath ragged, Yamamoto-san lay on top of me, unmoving. A thin sheen of sweat on her forehead, her hair clinging seductively.

“Sotomichi-kun…”

She wrapped her arm around my head, hugging me tightly.

“Can I be a heavy burden for just a moment?”

Her small voice carried the weight of her struggles.

“Sure. I’m listening.”

Since the issue was resolved, I didn’t need to brace myself. Her willingness to share meant she’d sorted her feelings.

“I love sex. Being intimate, touching each other’s core—it’s fun.”

I’d felt this too. Yamamoto-san’s service spirit let her explore her partner’s nature, choosing words and acts to please them.

“Cooking, hugging, knee pillows. Doing what they want, seeing them happy. Even during sex, just seeing their smile made me happy.”

Words befitting a saint, yet fitting for her.

“But the fun never lasted.”

Her tone dropped, her breath heavy with sighs.

“Cuddling on the sofa, touching legs, tickling. Slowly, slowly, until they couldn’t wait, and I’d let them finish… Everyone was happy, and so was I.”

She paused, lowering her gaze.

“But when they asked for more—handjobs, blowjobs—they’d lose control. Sex would end quickly, and it’d get awkward. But since they enjoyed it…”

Her voice tight, she hugged me tighter, taking a breath.

“Soon they’d beg, ‘Let me inside.’ Sometimes they’d almost force themselves on me. Why? We’d been enjoying it. Did they think I’d reject them because I couldn’t have sex?”

Her eyes glistened with tears, her pain evident. I held her, offering silent support.

“I didn’t care about not having sex. Just making them happy, hearing their praise—that was enough.”

Her struggle wasn’t about sex itself, but about not being able to please her partners in that way. Her kindness, beauty, and skill couldn’t compensate for this one failure, and it hurt her deeply.

“So when you waited for me to calm down, I was so happy.”

I was glad I’d paused when she tensed up. Noticing her feelings was the right move.

“When I asked you for sex in the archives, I was still anxious, but it faded as we spent time together.”

Her initial desperation for sex had shifted. From wanting to dispel bad memories to simply enjoying our intimacy.

“Thank you, Sotomichi-kun.”

She kissed my left cheek.

“Uh, you’re welcome.”

My awkwardness showed my inexperience. This was my first time feeling such clear affection from a girl.

“I can’t imagine you being cruel, even if unsure.”

Yamamoto-san’s kindness, devotion, and empathy made her wonderful. Hurting her would be unthinkable.

“Hehe. You only know the current me.”

My mind pictured her being hurt by men, but she’d grown into this wonderful person through struggles. A few years ago, she was a middle schooler, likely facing challenges.

“And you’re forgetting something important.”

“Huh? What promise?”

I thought our only agreement was to have sex until Miyu returned.

“Not a promise. You’re the type to misunderstand or assume, like Miyu said.”

“She said that too…”

Two girls pointing it out—I needed to be careful.

“Then figure it out yourself.”

She tapped my forehead.

“Yes…”

Though scolded, her hidden smile showed it wasn’t serious.

“Alright, that’s enough! Let’s have sex, Sotomichi-kun!”

She sang, taking a new condom from the box.