My Little Sister Is the Best F*p Material - Volume 5 Chapter 13: The Squeezing Rejuvenation Esthetic by the Perverted Nurse (Little Sister)

Volume 5 Chapter 13: The Squeezing Rejuvenation Esthetic by the Perverted Nurse (Little Sister)

With my pants still on, I had ejaculated without even touching myself, and now I stood naked in the living room, stripped of my clothes. Miyu, on her knees, wrung out a warm towel and meticulously wiped my lower body.

Dressed only in a nurse costume, with no underwear beneath, Miyu’s outfit could only be described as a “naked nurse uniform.” The buttons were fastened tightly from her neck to her lower abdomen, but the outfit was too small to contain her ample bust, revealing glimpses of her plump, fair skin through the gaps.

“Onii-chan, you’re always so energetic when it comes to sex.”

My groin, warmed to the perfect temperature, increased in blood flow, and I proudly displayed my rock-hard penis to the perverted nurse. Despite her petite frame, her breasts were outrageously voluminous. She was my sister, my lover, and undoubtedly the reincarnation of a succubus or something.

“Onii-chan, you’ve already ejaculated twice with Kanade and me, right?”

Focusing on my groin, Miyu wiped from the tip of my shaft to my thighs, removing the sticky discomfort of saliva and semen.

“Yeah, I did. Quite a lot just now.”

I was allowed to ejaculate as much as I wanted into Miyu’s body. Yet, I had already used up a significant amount, especially with the second unexpected release. No matter how quickly my semen regenerates, there’s still a limit.

“Since we’re at it, it’s better to make a big mess, right?”

Miyu opened the gap in her nurse uniform’s neckline, giving a glimpse of her cleavage. Faced with such a direct question, I couldn’t help but nod vigorously.

“Then, let’s move to your room.”

Miyu carried the basin of lukewarm water she had used to wet the towel and led me out of the living room. After refilling it with fresh water, she climbed the stairs.

I followed behind her, and Miyu entered my room first, closing the door. Hesitant about whether to enter immediately, I stood still for a moment. Seeing no response from Miyu, I knocked on the door and peeked inside.

“Come in,” Miyu’s voice said, and I opened the door, feeling a tense atmosphere.

“Oh… wow…”

Returning home, I found my room transformed into a cosplay brothel. The first thing that caught my eye was my bed, covered with different sheets than usual. Beside it, a table held three types of plastic bottles, and the basin of lukewarm water Miyu had carried was placed there. The room was dimly lit, with the curtains drawn, illuminated only by warm-colored lighting.

Every few seconds, a sweet scent wafted through my nostrils. A humidifier with aromatherapy was placed at the head of the bed, relaxing my body and redirecting my energy to my penis, which twitched vigorously. At the center of the room, Miyu, dressed in a nurse costume, sat in a formal seiza position, her hands folded in a respectful gesture. As she bowed deeply, her tight outfit hugged her body, causing her breasts to jiggle slightly, revealing a glimpse of her cleavage.

Raising her face, Miyu, looking slightly embarrassed, pointed to the bed with her palm facing up.

“I’ve prepared something like this…”

Even after preparing all this, she’s embarrassed now? That’s what makes her so cute and lovable.

“Are you going to give me a massage?”

“I’ll only give you a massage. But you’re free to touch me. And if you feel like ejaculating, go ahead. It’s an unlimited plan—no limits on time or ejaculations.”

It’s such a great deal that it destroys both price and reason. What am I supposed to pay for this? Considering everything so far, Miyu seems to get happier the more I ejaculate. That’s probably why she went to such lengths to prepare all this. For Miyu’s sake, I’m determined not to leave a single drop today.

“Should I lie on the bed?”

“Start face down, please. Don’t think about what I’m going to do. Just try to stay still until the end. If you can’t hold back, feel free to do as you please.”

I lay face down on the bed as instructed, ignoring the sound of Miyu preparing something beside me. The sheets were slightly thick, with a subtle firmness, which oddly enough prevented the sticky feeling of sweat or the chill of damp fabric, making it quite comfortable.

“What are those bottles? There are several types.”

“They’re beauty oils. One is my favorite for its texture, and another has ingredients to improve blood circulation. And… there’s also a lotion for sex.”

“I see.”

Miyu opened the bottles and arranged them in order of use, then straddled me, her legs wide open. Miyu’s legs, bare beneath her outfit, touched my body, transmitting a sultry warmth.

“I’ve always wanted to give someone a massage.”

Miyu covered my upper body with a thick towel and slowly applied pressure with both hands around my waist. Even such a normal massage, done by my sister with all her effort, warmed both my heart and body, loosening my tension.

“Have you ever received an esthetic treatment, Miyu?”

“When Haruka introduced me to one. I’m still a student, so it’s usually during her breaks. I’ve even had one at an overseas resort, thanks to her.”

“What is Haruka, really…?”

“In this world, it’s all about connections, Onii-chan.”

Miyu muttered dismissively, applying slightly more pressure to the massage.

“The person who took us on the Hokkaido trip owns a luxury hotel. Her husband is a wealthy trader too.”

As Miyu spoke, she pressed into my back, massaging my neck and arms with care. I expected something explicitly erotic from the start, but this is a surprisingly professional treatment.

“What’s the companion on that trip like?”

Half-asleep but not wanting to miss this exquisite experience, I continued questioning Miyu. My body, though relaxed, remained erect—a curious phenomenon.

“In one word… hmm…”

“Yeah?”

“Like a lolicon, big-breasted elf.”

“A lolicon, big-breasted elf.”

The unexpected description jolted me awake. So, a busty, blonde, fair-skinned woman who loves children? If so, it’s the most accurate description possible.

“She protested to her husband that if their sexless marriage continued, she’d cheat. After some twists and turns, he agreed that it was okay if it was with Haruka.”

“There’s a huge problem with involving a minor, though.”

The omitted “twists and turns” are intriguing, but I know I wouldn’t understand even if explained.

“Now, she’s completely hooked on baby play, hiding her secret side in daily life.”

“Her maternal instincts went off the charts.”

“The recipient’s, that is.”

“The recipient’s…”

Miyu and her classmates’ world remains beyond my comprehension. That much is clear. It’s pointless to dwell on it.

“Alright, your body’s loosened up. Now, I’ll use some oil.”

Miyu removed the towel from my body, warmed the oil in her hands, and began rubbing it into my back.

“Oh… this is… amazing…”

A sensation unlike regular massage or lotion. Miyu’s hands glided over my skin, yet the friction and warmth of her touch were distinctly palpable.

Without the towel as a barrier, my arousal surged with every touch. Miyu wanted to try massaging, so I’ll try to hold back as much as possible. My slightly sweaty body’s blood flow improved noticeably, and my already large erection began to tingle, like legs after sitting in a narrow chair for too long.

Miyu’s massage began with my back, then moved to my buttocks, kneading the flesh. Every touch felt so good I could lie there forever. Yet, I couldn’t help but wonder when she’d finally touch my penis.

“Should I start massaging the naughty spots now?”

“Ah, please do.”

Such exchanges had become natural between us. While I’ve come to see Miyu as my lover, having her give me such an erotic massage still feels unbearably sinful.

“Ugh… right there…”

Miyu began loosening the area from my inner thighs to around my anus. This spot, rarely touched even between lovers, excited me just by being caressed, while also making me feel Miyu’s trust.

“Massaging around the buttocks can stimulate the prostate similarly.”

Miyu instructed me to kneel, and I raised my hips while lying face down. The embarrassment of exposing my anus in such a vulnerable position stirred the masochistic tendencies ingrained in me, fueling my desire.

“Ugh… ah… Miyu… I’m close…”

Pre-cum already dripped thickly from the tip of my penis. If it has a prostate stimulation effect, this must be something akin to pushing out *placesen*. To have my little sister loosen my buttocks and make me leak semen—what kind of humiliating play is this?

“Want to release? Hold on a moment. I’ll make it easier to insert.”

Miyu dissolved some lotion in warm water, scooped it into her palm, and smeared it onto my penis, stretching it into threads. With me on all fours, she coated the underside of my shaft from base to tip, ensuring it was well-lubricated, then gave me a light handjob.

“Ah, aah, ah, Miyu, Miyu! No… wait…!”

My sensitivity was so heightened that I was on the verge of climaxing just from this. Miyu seemed to sense it too, skillfully controlling the stimulation to prevent premature release as she coated my penis with lotion.

Then, sliding her upper body between my legs, Miyu widened the gap between the buttons near her underbust, pressing my glans against her breasts.

“Insert it.”

Her tightly compressed breasts, with their fine, smooth texture, gleamed white from the fat beneath. Into that crevice, as if into a virgin’s folds, I thrust my penis, sinking deeply into her cleavage.

“Uah… so tight…!”

The pressure was astonishing. Not as soft as a vagina, yet not as hard as a palm—this perfect envelopment squeezed my penis.

Pushing forward, my penis was stroked by her bouncy, jiggling breasts; pulling back, the elastic ligaments drew my penis upward. Her breasts swayed up and down with my thrusts, further fueling my excitement.

“Do your little sister’s breasts feel good?”

Miyu, lying on the bed, smirked at me as I desperately thrust my hips. Annoyed by her attitude, I grabbed her wrists and pinned them to the bed. I’d punish this little devil with relentless thrusts.

“Ah… haa, haa… I’m close…!”

Though I was on top of Miyu, I had no control. I wanted to savor her breasts more, to dominate them more. My mind screamed these desires, but my instincts, captivated by Miyu, sent pulse after pulse of semen down my urethra.

“Auh… no… ah…!”

Thrusting uncontrollably, writhing in pleasure, Miyu simply watched me. I can’t say what she was thinking, but her mischievous smile showed she was enjoying it. As my movements slowed near climax, Miyu whispered, “Just release,” and by intensifying the breast-job stimulation, the milk-pressure squeezed my penis, instantly breaking the semen’s dam.

“Ahh… ah, Miyu…! I’m… cumming…!!”

*Doppu*, *byururu*, *dokun*, *doppu*, *byu*──!!

The semen burst inside her breasts, leaving faint stains on her nurse uniform. It was an anticlimactic end.

“……It’s warm.”

Miyu, her arms still pinned, looked down at her breast, filled with semen.

“Did it feel good?”

She looked up at me, her casual tone somehow endearing.

“It felt amazing.”

I released her wrists, and as she slid out from between my legs, she sucked the remaining semen from my penis, then moved behind me again.

“Now, lie on your back.”

I flipped over as instructed. Meanwhile, Miyu pressed her breasts from both sides, savoring the squishy sensation of the semen in her cleavage.

“The massage made you release a lot.”

Squeezing her breasts tightly, white liquid oozed from the gaps in her nurse uniform. Whether intentional or not, every gesture she made was incredibly erotic. Despite having just climaxed, my penis was already hardening again.

“Back to a regular massage now.”

Miyu reapplied oil to her hands and began massaging my chest and abdomen. From between her fingers to my entire arms, from my stomach to my neck, she meticulously loosened my muscles. Then, her fingers crept toward my chest.

“Mm… haa… uhh…”

I’d heard that nipples need to be developed to feel good, but mine were sensitive from the first time Miyu licked them.

Maybe my body is just naturally sensitive. I thought it was because Miyu was too erotic, but maybe I’m just a premature ejaculator. Fortunately, I can ejaculate multiple times, but if we have actual sex, I can’t keep changing condoms. I need to last longer in a single session.

“Onii-chan, raise and spread your knees. I’ll massage your lower body next.”

“Ah, okay.”

I raised my knees and spread my legs as instructed. Immediately, I realized the embarrassing position I was in and tried to close them.

“Wait, Miyu. You can massage without me spreading my legs, right…?”

“I could, but I thought since you’re kind of a masochist, making you take embarrassing poses might make you release more.”

“I appreciate your understanding, but hearing it directly is complicated.”

I somehow convinced Miyu to let me lower my legs, and she meticulously massaged my thighs and calves. I’ve heard that the muscles essential for ejaculation are concentrated in the lower body, and strengthening them can increase semen volume. Thanks to this massage, I’ll likely have another powerful release.

“I think your whole body’s loosened up now. Can I start doing normal naughty things?”

“U, um… Okay. I’m kind of nervous, though.”

“Just relax. I’ll make it feel good.”

Miyu straddled my waist, leaned forward, and latched onto my nipple with a chuu.

“Hauaa… That’s so good…! I love that…!”

Simultaneously, she slipped both hands between my legs—her left stroking my testicles, her right pumping my penis.

“O, ah… aaaah…!!”

The three-point assault sent my arousal skyrocketing. Miyu’s face, so close as she licked my chest, was adorable. Knowing such a cute girl was touching my privates made me feel like I’d ejaculate just from that.

“Ahh! Miyu… uuaaaah… Miyuu! Haa… aa… ugh… guaaa… aaaah?!”

“Nchu… chu… nfufu. You always moan like a girl.”

Miyu looked up at me while pumping my penis, pushing me to the brink of ejaculation in seconds. Helpless, I awaited the inevitable release.

But just before climax, the pleasure stopped. Miyu pulled away, tracing circles around my nipples with her middle fingers as she moved downward.

“Today’s main event is down here.”

As she moved lower, her upper body drew closer to my groin.

Right. Miyu’s handjobs felt amazing, but today wasn’t about savoring them. I couldn’t end this until I’d drenched this perverted nurse’s erotic cosplay in my semen.

“Onii-chanr’s twitching so cutely. But I won’t give you just breasts.”

Just before reaching the bottom, Miyu rubbed my penis with her stomach. Through the button gaps, she enveloped my penis, sliding her belly up and down to stroke the entire underside.

“Miyu… oaaah… that’s incredible… aaaah… aaah?!”

My penis was pressed against Miyu’s stomach. She moved her entire body back and forth, jiggling her ample breasts while gleefully watching my expression of pleasure. Her cuteness heightened my sensitivity, making my penis so responsive I could feel her navel’s indentation.

“Ah, ah, sorry! I’m cumming!”

There was no time for warning. Overwhelmed by the unexpected navel stimulation, I erupted, spurting semen onto Miyu’s stomach.

Barely recovering from that climax, Miyu finally moved her upper body between my legs, her soft breasts enveloping my penis. Post-ejaculation, my sensitive penis was relentlessly stimulated as she bounced her breasts up and down.

“U, ah… aguh, aaah… Miyuu… aaaah! Aaaaaaaah?!”

It was pure domination. Miyu’s full-body sensual assault left me helpless, writhing. No matter how many times I ejaculated, her shameless body relentlessly milked me.

“W, wait… Ah?!”

“You’re moving your hips yourself, what are you saying?”

Miyu’s words made me realize: unconsciously, I’d been moving my hips in sync with her motions, seeking deeper pleasure from her breasts. I thought I was resisting, trying to endure, but in truth, I was greedily seeking more stimulation.

“Like this, you can see the tip of your penis a little.”

Miyu unbuttoned one button, revealing the top of her cleavage. My glans, pushing out white liquid, peeked through.

“You probably don’t need more lotion now.”

Miyu scooped up the semen with her finger and licked it. The semen already coating her breasts made my penis so slippery that additional lubricant was unnecessary.

“Aah, auaa… Miyu… Miyu… it feels so good…!”

As if having sex with Miyu’s breasts, I gripped her upper arms and thrust my hips. Miyu gave me a mischievous look.

“Even though your little sister’s moving for you, you’re finishing yourself.”

Her words halted my movements. Desperate from all the teasing, I’d mindlessly thrust, but this was no different from masturbating.

“Haa… aa… s, sorry…”

“Nfufu, it’s okay. I’m happy you’re so turned on.”

This time, Miyu raised my knees, sliding her breasts back and forth around my penis. Supporting herself with one hand, she gently stroked my scrotum with the other.

“Oaah… ooh… oooh… amazing…!”

“You really like having your scrotum stroked, don’t you?”

My sensitive skin made even scrotum strokes feel incredibly pleasurable, almost making me scream. I might even prefer it to shaft strokes.

“Haa… aaah… Miyu’s breasts… so soft…”

Being stroked while my testicles were cradled in her breasts felt like floating in a milky sea of liquefied pleasure. But then, I realized something: it wasn’t just the breast job itself—it was the specific elements that ignited my passion.

What truly ignited my passion was the sight of Miyu’s lower body when I glanced sideways. Lying on the bed, my penis sandwiched in her breasts, Miyu’s position was anything but comfortable. Her legs spread wide like a frog’s, she diligently moved her body back and forth, jiggling her breasts. This realization overwhelmed me.

“Miyu… aah… Miyu…!!”

The same sibling affection I’d felt earlier surged again. My shy little sister, exposing herself so shamelessly to please her brother with a breast job. This image, replaying in my mind like a panoramic camera shot, intertwined complex emotions with my desire, exploding in an instant.

“Aah… ah… aaah?!”

The muffled G-cup breasts, sealed in her nurse uniform, slickly stroked my penis. Prompted by Miyu massaging my testicles, I released my semen. Lying there, I watched in a daze as my penis, protruding from her cleavage, ejaculated until the last drop of white liquid spurted out.

“Sorry… I’m… cumming again…”

“Yeah. I know.”

After a while, Miyu stopped moving, paused for a moment, then asked me to lift my hips. I obliged, and she sat up, kneeling with her knees spread, pulling my hips onto her lap.

This positioned her ample breasts directly under my groin. Even without pressure, their weight felt heavy, and I couldn’t help but admire how she’d maintained such density. Miyu grabbed her own breasts, inserted my penis into the gap in her uniform without hesitation, and began kneading my shaft through her breasts with both hands.

“Ooooh… ah, seriously, I just came…!!”

“Does it feel good?”

“Guh… haa… i-it feels good…! So good…!!”

“This stimulation is the strongest, after all.”

Her breasts slapped against my groin, their weight emphasizing the reality of the breast job. However, it seemed Miyu was just experimenting, and the relentless pleasure finally paused.

“Haa… haa… I’m dying…”

“But you’re getting used to consecutive orgasms, Onii-chan.”

Miyu traced my softening penis with her index finger, enjoying watching it sink into her breasts.

“You react so well when I touch your groin area.”

“Well, it’s the most sensitive skin there.”

“Should I touch it while giving head too?”

“I’d love that. But sometimes I just want you to suck me dry without distractions.”

My favorite is still Miyu’s straightforward fellatio, her expression blank. But having a proper girl like her perform lewd acts like licking my testicles gives a unique pleasure, so I’d like that too.

“Do you like having your testicles licked?”

“U, um…”

Her question made me feel awkward, yet excited.

“Having a breast job while licking my testicles would be amazing.”

“While using my breasts? Hmm… maybe if I face the other way…”

Miyu tried to figure out how to lick my testicles while giving a breast job. But that would require her to face away from me, fully exposing her untouched privates. Of course, she realized this, and though she turned her body, she hesitated to straddle me.

“Still uncomfortable showing it?”

“I can’t just show it, even to my boyfriend.”

Even as lovers, she hesitated to reveal her most intimate area. If I insisted, she’d probably comply, but I didn’t want to push her beyond her mysterious shyness.

“Maybe if we’re this close, it’s okay.”

Miyu straddled my chest, sitting directly on me without raising her knees, pressing her body against mine. True, her most sensitive area was mostly hidden, but her perfectly white, peachy buttocks and cute anus were fully visible, instantly arousing me. How many brothers would get erect after ejaculating five times just from seeing their sister’s privates?

“My breasts are in the way of my tongue… they’re so annoying…”

If she’d simply leaned over me for the breast job, she could’ve licked my testicles while my penis was in her cleavage. But with our bodies pressed together, her neck couldn’t lower enough.

“Can I lift my hips?”

“Go ahead.”

I thrust my hips, inserting my penis into Miyu’s breasts.

“Aaah… Miyu’s breasts are so tight…”

As I slowly moved my hips, Miyu’s tongue flicked my testicles, making me moan again. With Miyu’s buttocks in my face, I wondered if she could see my anus too, feeling a bizarre shame at what we were doing.

“Chu… nero…”

“Haa… both your breasts and tongue… they feel so good…”

I gazed at Miyu’s faintly colored privates, savoring her service. Despite all the sex with Haruka, Miyu’s genital area was surprisingly pristine. Her labia were tightly closed, with no trace of hair. Seeing just her lower body, she looked like an elementary school student—except for her G-cup breasts.

Her anus, lighter than I’d imagined, was irresistibly alluring. While receiving a breast job, I couldn’t resist gently stroking Miyu’s anus with my finger.

“Hinyah?!”

Miyu let out a cat-like sound, her body twitching. So cute I wanted to ravish her, but I’d probably get scolded.

“Ugh… that startled me…”

Caught off guard, Miyu’s voice was slightly slurred, with just a hint of embarrassment. Before, this would’ve earned me punishment, but our relationship had progressed. Realizing this made me happy.

“Miyu, you know, men get more aroused when girls are enjoying it too.”

“U, um… I guess so.”

Miyu teased the base of my penis, nestled in her breasts. Men try to please their partners out of affection, but mostly because dominating and arousing a woman excites them.

“So, can I lick your privates?”

“Absolutely not.”

She firmly refused, but even Miyu felt guilty for always saying no, her tone softer than usual.

“You can touch my body however you like.”

Finally, a compromise from Miyu. While she’d said touching was allowed from the start, this explicit permission to pleasure her was significant. Her tone still distant, but knowing she’d never offer this to anyone else filled me with joy.

“Then… I won’t hold back…”

I started by caressing Miyu’s buttocks. Her skin, as smooth as snow, clung to my hands, every part retaining just the right amount of fat. Her body’s softness was palpable, and I reveled in her coveted flesh.

“Uhh… haa… uhh…”

Miyu trembled slightly, still licking my testicles. Her body, seemingly fully developed, was sensitive everywhere. Especially her thighs.

“Ahh… hau… naah…!”

She writhed as if her sex were being touched directly. No wonder she’d warned me not to touch her thighs carelessly before—her reaction was understandable.

“Miyu, lift your hips.”

“Feh… ah… Don’t lick down there.”

“I won’t. But look, it’s dripping so much.”

The lewd droplets trailing down Miyu’s thighs were what I’d once craved. Seeing them so close, I couldn’t resist.

As I tried to lift Miyu’s hips, she reluctantly raised her buttocks, though protesting verbally. I then pressed my tongue to her thigh, where the enticing liquid dripped.

“Ah, hiyayun… aaah…  nyooo…!”

Miyu moaned as if a vibrator had been inserted into her, her love juices flowing like a spring. I devoured her thigh like a desert wanderer finding an oasis.

“Hya, ihyaaa… nh… Onii-chan, hyan… uuu… nNn!”

“Chu… chuba… haa… Miyu…!”

Hearing her moans, my hardened penis, coated in semen, slid in and out of Miyu’s breasts.

“Ah, ah, aaah… Onii-chan… I can’t… hau… nnh──Nn──!!”

Miyu’s body trembled violently. Just from licking her thigh, she’d climaxed. I, too, couldn’t hold back any longer.

“Miyu… I’m cumming…!! Miyu… Miyu?!”

“Cum… Onii-chan… hau… naah… raihe… nnnn?!”

Dobyu, byu, byururu, byuku, byuru──!!

My semen gushed repeatedly, unabated, spilling into Miyu’s uniform.

“Haa… haa… uuu…”

Miyu collapsed, breathless. Had I gone too far?

“……Pervert.”

Miyu, propped on her hands, looked at me. Her sharp gaze, due to her eye shape, wasn’t as intimidating as usual. Semen dripped from her cleavage, overwhelmed by the volume. Being called a pervert in this state was embarrassing.

Miyu meticulously licked the semen from my penis, and we faced each other on the bed. Sitting cross-legged, Miyu pulled her nurse uniform’s hem to cover her lower body.

“Was licking too much?”

Miyu didn’t seem angry, but I asked cautiously. Hesitantly, she replied.

“It’s embarrassing being watched while I climax.”

Her honest admission, whispered softly. Miyu had mostly been the giver until now. It was obvious, but hearing it confirmed it.

“You don’t like being seen naked either, right?”

Miyu bathed with me but still resisted showing her privates.

“Because, well… I’m like this.”

Miyu stroked her smooth lower abdomen.

“You think I’m childish, right?”

Miyu was self-conscious about her hairless, tightly closed labia. Given her fashion sense, I thought she’d welcome it.

“You cosplay as a loli, so isn’t this better? Haruka’s probably the same, right?”

“Haruka’s entire body is loli-like, so it’s fine. I only have a mature look from the chest up, so this imbalance is embarrassing to show.”

Miyu’s always been self-conscious about her breasts. If she were as loli-like as Haruka or as fully adult as Yamamoto, she might’ve been more confident about her body.

Miyu’s mature in chest size, demeanor, and eyes, but her build and face are very youthful. I love her appearance, but forcing compliments on insecurities wouldn’t help.

“Honestly, I think it’s childlike.”

“Right?”

“But personally, I adore Miyu’s smooth, soft body.”

“Haa, yes.”

“I love everything about you, including your big breasts. That’s why I love you.”

“……Th-thank you.”

Miyu looked away, either embarrassed or withdrawn. Either way, her expression wasn’t negative, so I think her affection wasn’t hurt. I believe she understood, but delivery matters. Presenting my perversity logically forces her to take it seriously. At least in our relationship, this works, as I’ve learned.

“By the way, did you really have sex with Haruka?”

“We did… Why?”

“Despite having sex with Haruka so much, your color’s light, and your shape’s unchanged.”

“Probably because our sex is different from what you imagine.”

Different sex? I thought lesbian sex involved mutual touching, licking, and grinding. Especially with Haruka.

“Did you use dildos or strap-ons?”

“Rarely. When using vibrators, they’re finger-sized or small clitoral stimulators.”

That’s surprising. Given Miyu’s development and Haruka’s adult toys, I assumed intense sex.

“You know… I love wearing cute clothes, right?”

Miyu asked, referring to how I get abnormally aroused seeing her in lolita cosplay. I nodded, urging her to continue.

“That’s why I borrow clothes from Haruka. Sex is secondary.”

Miyu mumbled, seeming reluctant but willing to explain.

“You have sex to borrow clothes?”

“Yes. The number of orgasms determines what I can borrow.”

That’s slightly different from what I’d heard before, but maybe just more detailed.

“One actual play: I wear Haruka’s chosen outfit, handcuffed, standing on an unstable platform, enduring her relentless teasing while watching myself in a mirror.”

“I never imagined something so intense.”

And you must orgasm to borrow, right? What does Miyu feel while Haruka makes her climax?

“The sex involves endless breast caressing, thigh licking—slow, relentless stimulation. No intense intercourse like heterosexual sex.”

I see. Since Miyu gets aroused seeing herself, strong stimulation isn’t needed. Slow, visible teasing is more effective.

“Though, genital color and shape are mostly genetic.”

“I didn’t know that.”

I assumed unused genitals were all tight, but that’s illogical. Bodies mature, including genitals.

“One more important thing.”

“Yeah, what?”

Miyu lifted her breast, encased in the nurse uniform, emphasizing it.

“Since you said fat reduces with massage, I used my breasts this time.”

“True, I did say that.”

I’m no expert, but theoretically, it makes sense.

“If I become H-cup, no more breast jobs.”

“Wh-what?!”

The shock hit like a hammer, and I grabbed Miyu’s shoulders, pain shooting through my temples.

“Please, no…!”

Losing Miyu’s breast jobs would ruin my life. I couldn’t accept it.

“Fah, ah, Onii-chan…”

“Of course, Miyu’s health comes first. If it’s harmful, I have no right to ask. But we shouldn’t assume the worst. Let’s research ways to reduce breast size and try everything. Instead of waiting, we should experiment. Then, we can enjoy breast jobs guilt-free.”

After my plea, Miyu froze, eyes wide.

“Sorry.”

“U, um… You’re right.”

Releasing her, Miyu took a deep breath, and I followed, calming myself.

“Um, Onii-chan… I’ve never said this, but…”

“Yeah, what?”

“When we’re alone, my guard’s down. Don’t startle me, okay?”

“My bad. Sorry.”

“It’s okay.”

Miyu’s like a small animal at home. I’ll be more careful.

“What happens when your guard’s up?”

“I can tell who’s coming for me by footsteps in the hallway.”

“What world did Miyu grow up in…?”

She’s probably been approached by men and women since childhood, developing skills to avoid hassle. I’ll accept that explanation.

“Are we done with just this?”

Miyu surveyed her nurse uniform, stained with my semen. Though I’d enjoyed it, the main course was still pending.

“I’d love to try inserting from the front…”

Inserting into her breasts while standing face-to-face—the ultimate breast job experience.

“Can you go again, Onii-chan?”

“If I try, I think I can.”

Despite my inability to resist Miyu’s commands, atmosphere matters. We were in a light pillow talk phase, making an immediate rematch difficult. A break would help, but Miyu was drenched in semen, so resting wasn’t an option.

“Inserting from the front means you’ll stand and move yourself, right?”

“Yeah.”

“Then, maybe tie me up?”

“Really?!”

“Just lightly. Both hands.”

What an understanding sister. My desire reignited.

Miyu got off the bed, laid a towel on the floor, and knelt on it. I searched for restraints but found nothing suitable, settling for her uniform’s tie. Miyu, though concerned about wrinkles, agreed.

“Is this okay?”

“Perfect. I can’t untie it.”

I tied her hands behind her back as she instructed.

The sight was incredibly erotic: a loli-breasted nurse, drenched in semen, bound and kneeling. Her exposed shoulders accentuated her breasts, inviting me to take her.

“You’re too erotic—I’m getting hard.”

“I can see.”

My desire, which I thought was gone, surged. I wanted to defile her more.

“Miyu, I’m inserting.”

I stood in front of her, placed my penis between the buttons of her cleavage, and inserted it to the tip. Her nurse cap, pinned securely, stayed in place as she looked up at me. Her large eyes watched as I inserted my penis into a hole unrelated to reproduction.

What does it feel like to have a penis inserted into your own breasts? Is it similar to the tension of vaginal insertion? From what Miyu’s said about Haruka, she’s never had anything thick inside her.

Which is tighter: her breast meat squeezed into the uniform or her vaginal walls? I’d love to compare. She’d probably be embarrassed. Everything she does is erotic. I might ejaculate before fully inserting.

“Uh… Not inserting yet?”

“Eh, yeah. Just… a quick break.”

“Okay.”

Miyu spoke calmly, glancing at my paused hips. She seemed to accept it but couldn’t resist commenting.

“That was fast.”

“Sorry.”

“It’s fine, though.”

Even she called me out for being premature. With such an erotic sister, it’s unavoidable. It’s not my fault.

“Alright, again…”

Calming myself, I thrust deeply into her breasts. My penis fully engulfed by my sister’s breasts—the image was too erotic, making ejaculation inevitable.

I moved my hips slowly to avoid premature release, and Miyu simply watched. No verbal teasing, just a passive recipient of her breast violation. Under her dry gaze, I tried to clear my mind, focusing on the motion.

“Mm… fuu… uhh…”

Our voices naturally softened, the room filled with wet, squelching sounds.

In that silence, our eyes met. Miyu’s slightly upturned eyes gave her a naturally assertive look. Seeing her bound and dressed so lewdly, my desire surged, even without accelerating my thrusts.

“If I say I want to release… will you be mad?”

“No. I’ll just think how much you love my body.”

“I can’t get this aroused with anyone else’s body.”

“But let’s work on your premature issue.”

“Y-yes…”

We knew we’d have many more sessions, so there was no rush.

As we talked, I grew accustomed to the tightness. Wanting to mark her more with my scent, I lifted her breast meat and thrust harder. Accidentally, my finger brushed her nipple.

“Higyuu?!

Miyu’s body arched, her breath the only sound as she suppressed her moans. Seeing her embarrassed by the sudden pleasure, I gently continued stimulating her hardened nipple, wanting to see more of her flushed reaction.

“Hyaa… uhh…!”

Miyu desperately held back her voice. Until now, I’d focused on making her climax quickly, but her struggle to hide her embarrassment was incredibly erotic.

Miyu hates moaning. Her body’s just too sensitive; strong stimulation forces her to vocalize. Even with her boyfriend, she’d be embarrassed to be heard. So, she suppresses her moans as much as possible.

“Nh… aa… hih… Nn…!”

Her nipples teased, Miyu’s breath quickened, but she tried to hide her pleasure-distorted face. Bound, she couldn’t evade the stimulation, her body trembling, mouth opening to release guttural moans.

“Miyu… no… you’re too erotic… I’m close…”

“Haa… fuuu… aguh… Ihyan…!”

“Aau… Miyu… I’m cumming?!”

“Hinya… wata… himo… Ikyuu…!”

*Doppu*, *byururu*, *byubu*, *dopun*, *pyu*, *byuru*──!!

My penis, engulfed by Miyu’s breasts, released a generous load. White fluid oozed like post-intercourse, mixing with her juices. As I ejaculated, Miyu climaxed, her spasms pushing out the semen.

“Haa… haa… fuhaa…”

Miyu, breathless and dazed, lay there. Just licking her thigh or teasing her nipples made her climax—how erotic was her body? I wanted to push her further.

“Onii-chan… tying my arms and doing that is cheating…”

“The first time was an accident. You’re just too cute to resist.”

“Moo. You’re a siscon, premature, and a lustful idiot.”

“You’re no better at holding back, though.”

“Uhh… girls can climax multiple times, so it’s fine…”

Miyu puffed her cheeks, turning away. Then, rubbing her knees together, she glanced up at me shyly.

“All done?”

“Yeah. I’m satisfied.”

“Okay. That’s good.”

Despite her words, Miyu seemed unsettled.

“You released a lot, huh.”

Tugging at the tight tie binding her arms, she mumbled.

“Can you untie me?”

“Sure. Are you okay?”

I started untying the knot, gauging her reaction. After a moment, Miyu, resigned, whispered her truth.

“I’m… turned on.”

With me spent and the mood winding down, Miyu’s desire peaked. She’d asked to be untied, likely planning to handle it herself.

Leaving my lover aroused would be unforgivable.

“I’ll be gentle.”

I slid my hand between her legs, touching her clitoral hood.

“Feh… I-it’s fine! I’ll do it myself! At least free my arms… Sihyan… Fhyaa?!”

As taught, I avoided direct clitoral contact, stimulating her through the hood. No deep pressure, just a steady rhythm, letting her find her pleasure.

“Hiyaa… ah… stop, aaah… Onii-chan… ah… higyu… nnn!”

Miyu trembled, moaning, but this reaction meant she was enjoying it. Knees shaking, she lifted her hips, her uncontrollable movements guiding my finger’s pressure.

Bound, writhing in pleasure, Miyu was adorable and precious. Her leaking juices, like a leak, were cute. Covered in semen, her pink nurse cap bobbing, eyes closed—she was irresistible.

Her squirming hips drew my gaze to her round buttocks. Remembering her reaction when I touched her anus, I smiled.

“Miyu, you’re so cute. Enjoy it more.”

I dipped two fingers into her cleavage, scooping semen. Showing her the sticky threads, I coated her anus.

“Hyaaaah! Stop, please! Onii-chan… nnya… higyu… Nn… ah, ah… hyaa…!”

Stimulated front and back, Miyu struggled against her bindings, trembling in pleasure.

“Aau… nnn! My… butt… hii! Semen… nyaaah?!”

Kneeling, she thrust her hips like riding, trying to escape both pleasures.

“Hya, I’m… c-cumming… cyumming…!”

Miyu climaxed violently, eyes to the ceiling, then kept climaxing. She screamed like an animal until I stopped, then lay still, spent.

“Miyu, are you okay?”

At my voice, she looked at me, unfocused. Conscious but breathless, she drooped like a tortured prisoner.

Trying to untie her, the knot was tight from her tugging.

As I struggled, Miyu’s strength slowly returned, her breathing normalizing.

“Uuu… To be humiliated like this…”

Miyu, teary-eyed, didn’t seem angry, so I must’ve done well.

“My whole body’s sticky.”

“I might’ve overdone it.”

“I always wonder where all this semen comes from.”

“Me too.”

Hearing Miyu’s erotic voice again made me aroused, but I kept quiet, knowing she’d be mad if I pushed further.

“What’s under her clothes, I wonder.”

“Let’s unbutton and see?”

“Good idea.”

I gave up on the tie for now, helped Miyu sit up, and moved to her front. I started unbuttoning from the top.

“So tight.”

“Breathing was hard. Praise me, please.”

“I’ll spoil you endlessly after a bath.”

“You promised.”

The second button released, and her breast popped out like in a manga. I unbuttoned to her stomach, swallowing at the sight of her semen-covered body.

“So lewd.”

“Really?”

“Yeah, from the front, it’s incredibly obscene.”

“I see…”

I’d never see her like this again, so I decided to show her.

“I’ll get your camera.”

“Eh, ah, okay.”

Miyu knew what was coming. When I returned with the camera, she stayed still but glared at me, overwhelmed with shame.

Her defiant stare, like a defeated knight, only excited me more. Watching her, my arousal returned.

“Miyu, sorry. This is really the last time.”

Seeing my erection during the shoot, Miyu, though exasperated, agreed. I decided to ejaculate on her, a rare opportunity.

“I’ll try, but I might not release much. Just a little.”

“Be grateful your silly lust is indulged.”

Grateful for Miyu, I stroked my penis. It’d been a while since I’d done this. Having cute girls handle it had made my sex life abnormal.

My penis felt heavier, definitely larger. Miyu didn’t want it bigger, but with her body, it was inevitable.

Before me was a bound, busty nurse in a miniskirt. Her youthful body and cute long hair created a gap moe overload.

“Haa… haa… Miyu… your glare… I’m… close…”

“Go ahead.”

Miyu’s cold gaze, flat tone, and sharp words heightened my excitement.

“Ah, aaah… Miyu… I’m cumming!”

“Okay. Let it all out.”

“Ugh… uguaa… aaah! Cumming…!”

Byuru, byuru—semen shot toward Miyu’s breasts. A visible stream dripped from her chest to her stomach.

“Feels good…”

“Good job.”

Dizziness from over-ejaculation hit me as Miyu twisted toward me, still bound, and took my penis into her mouth.

“Miyu…”

“Mmm… muchu… juru…”

She bobbed her head, bound hands behind her, swallowing the semen with her saliva.

“A special service. Cleaned it up.”

“Thank you. It was amazing.”

I finally untied the tie, freeing Miyu from her bonds. The wrinkles were noticeable. Seeing them would remind me of today’s session, which might disrupt my school life.

“You’re throwing that outfit away, right?”

“Hmm… I could wash it, but it’s so modified it’ll fall apart.”

“I see. Can’t be helped.”

It was a cheap cosplay costume, after all. Plus, reusing the same idea would be dull.

Miyu removed the nurse uniform and tossed it into a thick trash bag. She’d prepared old towels, which we used to wipe the semen and room, then bagged them too.

We opened the window for ventilation, started the bath, and decided to clean up before soaking together. Miyu, despite her shyness, joined me in the bath, which made me happy.

After cleaning the room, we bathed, washing thoroughly before entering the tub. I held her from behind, our usual position. This calmed me, making me realize our session was truly over.

“Would you hate other cosplays?”

“If you ask, I’ll consider it. Any requests?”

“No, I was thinking this might be the last time for tight outfits and breast jobs.”

“Oh, that. Hmm…”

This cheap costume was meant to be ruined, but her regular clothes wouldn’t allow it.

“Any outfit can tighten breasts, but for front insertion, only that nurse uniform or a specially open-chested one works.”

“Right. That’s not the same.”

An obvious “insert here” outfit loses its charm. Miyu agreed, not recommending it.

“I have an old bra I was going to discard. It supports from the front, so it might work.”

Miyu’s unexpected revelation shocked me.

“Genius!”

“I didn’t say I’d do it.”

“We must!”

“I might reuse it if my breasts shrink.”

“But some bras are just worn out, right?”

“One is… but…”

“Then it’s decided.”

Miyu’s genius saved my breast job life. Intelligence is key, even in lewdness.

“Really? Doing it in just a bra is too embarrassing.”

“Less than that nurse outfit, I think.”

“Using a lewd outfit for lewdness is normal.”

“True.”

But too much intelligence is troublesome. I can’t win an argument.

“Maybe, if I feel like it.”

“For you, I’ll be the north wind or the sun.”

“Even with impure motives, your effort is praiseworthy.”

She’s surprisingly kind.

“I’m glad you tried so hard. You’re the best lover.”

“Always think that.”

“I will.”

Squeezing her waist, Miyu placed her small hand on mine.

“Can love’s sickness be prevented?”

“Not after this.”

“Good. I’ll need your help sorting things soon.”

“Got it.”

I’d be happy just with the present, but Miyu, a perfectionist, wants no distractions for our future. I’ll support her, as it’s why she loves me.

“By the way, Onii-chan…”

“Yeah?”

“When will you take my first time?”

“Eh! Oh, right!”

With Yuka, Haruka, and Yamamoto distracting me, I’d forgotten. Our future plans and our relationship are separate.

“I know what to be careful of.”

“Hmm.”

Miyu leaned on the tub’s edge, glancing at me. After a pause, she faced forward, wrapping her arms around me.

“You invite me.”

“So, I passed? You trust me?”

“Yeah. You seem to understand, so I’ll trust you.”

Unexpectedly, she left it to me. I must’ve shown her something these past days.

“I’ll make it memorable.”

“Thanks. But don’t abstain for days and then invite me—I’ll run.”

“Got it. I won’t.”

Ejaculating that much inside her, even with a condom, would be disastrous. I’ll release some before inviting her.

“Miyu.”

“Yeah?”

I moved slightly, turning my head. She faced me.

“Mm…”

Our voices overlapped.

I slowly pulled away from our first self-initiated kiss.

Miyu opened her eyes, smiled, and placed her finger on my lips.

“We’ll practice kissing too.”

She wrapped her arms around my neck, asking for another kiss. We kissed until the steam faded.