Yamamoto-san and I boarded the bus from the station's bus stop.
The passengers, few enough to count on one hand, took seats toward the front one after another, so we ended up sitting side by side in the very back row.
Our hands remained linked, placed between our knees.
That was the current distance between us.
I thought she'd get more clingy since there were no prying eyes, but Yamamoto-san had a different kind of tension compared to when we were in the department store. She'd been silently averting her gaze for a while now.
The bus interior echoed with the strong exhaust noise typical right after starting, mixed with the air conditioning.
Only my right hand, connected to Yamamoto-san, was enveloped in an abnormal warmth.
Had her innocence flared up again at the thought of going home alone with a guy?
Though today's Yamamoto-san had been overall quite fresh and inexperienced, I figured we'd had enough physical contact to ease her tension.
As I observed her closely to figure out what was wrong, it didn't seem like she was being fueled by embarrassment.
If not that, then it must be because of that last thing.
I wonder how Yamamoto-san took my confession.
"Sotomichi-kun. I have one question."
She placed her hand on my knee and spoke solemnly.
"W-What is it?"
When I responded, Yamamoto-san stared straight at me.
She looked like she was steeling herself.
"Do you like Miyu-chan?"
She leaned forward. That was her determined push.
So that question came up now.
The earlier tension being different from lovesickness was because she feared she was stealing me away.
Apparently, she hadn't heard me assert that Miyu was number one.
"I like Miyu. As a lover, of course, there is no other than Miyu."
"Right? You like Miyu-chan more than me... right?"
"If I have to say who's higher, it'd be Miyu. It's rude to compare like this, though."
"No, it's fine... Haah... I'm relieved..."
Hearing that, she slumped in relief and leaned against me.
Even though it happened impulsively, it seems stealing me away would indeed trouble her.
If that happened, it would literally destroy a family.
Thinking about it, from Yamamoto-san's perspective, it must have been terrifying.
"Should we pretend that thing at the general store didn't happen?"
"That was just a wish. It's fine to be number one in fantasies, right? But this is just a reprieve until my feelings cool off. If you mistakenly choose me as number one, it'd be bad for Miyu-chan."
It seemed that was her only concern.
The relieved Yamamoto-san casually lifted our joined hands and first pressed our knees tightly together.
"So, we can flirt again from here."
She grinned, regaining her composure.
"Because Miyu-chan allows it," using that as her strongest excuse, even though we were already on the way home, she was excitedly upbeat like we were going on a trip.
Yamamoto-san could unleash her full feelings of liking me because she was certain our relationship with Miyu wouldn't break.
Otherwise, no matter how much she wanted to be spoiled, she would have quietly stepped back.
No matter how pent-up her sexual desire or how her ethics crumbled under her crush, the fundamental nature of Yamamoto-san as a person wouldn't change.
The reason she went as far as this affair-like physical intimacy was none other than because Miyu permitted it.
Flirting because Haruka did it, getting aroused because Yuka said she'd have sex, so Yamamoto-san could think that up to that point was a safe zone.
Even if she acted lovey-dovey like a girlfriend or even if it led to physical relations, my bond with Miyu wouldn't shatter.
With that conviction, she could express her love to her heart's content.
To draw out Yamamoto-san's serious feelings, I needed to throw my own like at her.
That was the true meaning behind the instruction: "Affirm Miyu as number one, then tell Yamamoto-san you like her."
At least, that's what I think now.
"Then, even like this, you still like Miyu-chan the most, right, Sotomichi-kun?"
Yamamoto-san clung to my upper arm, wedging it as deep as possible into her breasts given the clothing structure.
Even through her bra, the softness of those breasts made my dick twitch in response.
It was hard to focus while walking, but the view of Yamamoto-san's cleavage from directly above was spectacular. I belatedly thought, yeah, her tits are really huge.
"T-That much is, well..."
"Then... this is okay too...?"
Keeping my arm sandwiched in her breasts, she now guided my hand to wedge between her thighs.
The moist body heat transmitted to my fingertips, stirring my heart and lower abdomen.
Yamamoto-san's inner thighs grew damper closer to her crotch, and sliding my hand outward let me savor the plump, smooth softness.
Because she was wearing short pants, I could touch skin quite far up—if I messed up, my fingers might reach a girl's precious spot.
What do I do.
I'd gotten used to a girl's pussy, but maybe because I had no experience touching one outdoors, I was incredibly drawn to that hidden area.
"Anything more, maybe we should stop. Because of you, Sotomichi-kun, my panties are soaked and steamy, probably not pretty."
"Uh, yeah... r-right."
Even saying that, Yamamoto-san smirked seductively and pulled up the hem of her already short shorts to flash her panty line.
Teased like that, my sexual desire finally ignited.
She was probably just cautiously probing the line where my feelings for Miyu wouldn't change, but being tormented little by little like this made me feel like my love for Miyu was being tested, heightening my excitement.
"Sotomichi-kun, isn't the zipper area of your pants twitching?"
"Ugh... this is... as expected..."
My affection for Miyu and lust for Yamamoto-san were separate things.
The world wouldn't accept such a convenient excuse, but since it was fact, there was no helping it.
Facing this embodiment of Eros, I wanted to praise myself for holding out this well.
"No good. Getting hard in front of someone who's not your lover."
No matter how you looked at it, the one making it hard was the culprit herself, rubbing her breasts against my arm while letting me touch her thighs, not caring if her clothes stretched, even trying to expose the inside of her bra.
The round skin area increased rapidly, her nipples peeking from the deformed bra, and at that obscene sight, my dick quickly surrendered to male instinct.
On the bus were people casually looking out the window or killing time on their phones.
Unnoticed by them, we, who weren't even a couple, were flirting and touching each other's erogenous zones.
As a result of admitting defeat, my crotch had formed a fully tented bulge.
"Ehehe. Sotomichi-kun's loss~"
She poked the peak with her finger.
No way I could win against someone unleashing this kind of erotic violence.
"Shall we start punishment time?"
She asked with upturned eyes.
I understood she wanted confirmation because of Miyu, but what kind of question was that?
"If I say no, what then?"
"Eh... I wanna..."
She blinked cutely, begging.
The choices were basically fixed.
Like a malicious game where presenting two options loops if you pick the wrong one.
"P-Please..."
"Nfufu. Can't be helped~"
The enthusiastic Yamamoto-san unzipped my pants, breathing heavily as she stroked my penis.
She had a lot of pent-up sexual desire.
Scanning her brain now would probably show something wild.
"You're already so slippery. Sotomichi-kun, you're such a perv."
She kneaded my precum with her fingertips, making that absurd accusation.
It was all her fault, so no remorse arose, but this irrationality in sex was part of her cuteness, making me enjoy it too.
"No cumming until we get home. Though you probably couldn't anyway."
Yamamoto-san unbuttoned my boxers' front and slipped her fingers in without pulling out my penis.
Using her index and middle fingers to loosely grip my erect shaft, she precisely targeted the sensitive corona and opening with the sides of her fingertips, pressing, squeezing, squeezing.
"Guh... haah... that... feels good..."
With minimal force stimulating my genitals, she stared at my face with starry eyes.
How much did she love watching me feel good?
She really loves sex, huh, Yamamoto-san.
Dragged by her genuine enthusiasm, even I started wanting it.
"Ah... come on... Sotomichi-kun..."
My hand toyed with her thigh, but she continued the finger torment unchanged.
More than the pleasure from her erotic technique, the wave of emotion from her wholeheartedly enjoying sex heightened my arousal most.
Then, since the bus was quiet, we continued our discreet play.
Mutually squelching the same spots, trembling in pleasure while desperately holding back voices.
When passengers boarded, Yamamoto-san temporarily stopped clinging to my arm, but she never stopped stimulating my shaft with two fingers.
Even with people facing us.
Using the seat backs as blind spots, we did naughty things.
She'd always wanted to try outdoors. During the previous molester play, she was lively.
More than getting pleasure herself, the joy of enjoying sex together with a partner far outweighed it.
Seeing Yamamoto-san purely enjoying sex made her 50% cuter.
"Sotomichi-kun, it's almost time to get off."
When the bus reached near her home, Yamamoto-san withdrew her hand from my pants and licked the sticky precum on her fingertips with a "slurp."
"Nh... Sotomichi-kun's naughty juice... salty-sweet..."
Everything she does is erotic.
She enjoys anything, and as a sex partner, there's no one better.
Her previous boyfriends all came before even fingering her panties, so it must have been disappointing for her and them.
Though even if they hadn't cum quick, I doubt all would have indulged her exhibition play like me.
"Sotomichi-kun. Hide that using me as cover."
The bus stopped. Yamamoto-san stood, looked down at my bulging pants, and pulled my hand.
It couldn't be hidden by just bending, so I adjusted position based on passengers' gazes to camouflage.
Even after getting off the bus stop, it was the same, and by the time the erection settled, I had reached the apartment where Yamamoto-san lived.
Unlocking the entrance, riding the arriving elevator, with no eyes finally, Yamamoto-san's excitement rose further.
From behind me operating buttons, the impatient Yamamoto-san hugged me, burying her face and mumbling.
"Sotomichi-kun likes Miyu-chan, even if he has sex with me he likes Miyu-chan, so I can have sex with Sotomichi-kun..."
Seeming to hypnotize herself.
No matter how her ethics crumbled, she couldn't stop worrying about cheating.
Elevator reaching the floor, she took my hand down the hall.
Unlocking her room, marking yet another visit to Yamamoto-san's place.
"Umm... Excuse my intrusion, I guess?"
Though not lived in long, entering the familiar entrance stirred nostalgia, raising a question.
To me, Yamamoto-san, who'd removed shoes and entered, turned back with a spin.
"If you say 'I'm home,' I'll always say 'Welcome back.'"
Her carefree smile hid my embarrassment.
Murmuring "I'm home" timidly while removing shoes, when both feet landed, she softly said "Welcome home."
Her room interior remained unchanged.
It's only a matter of course because it hasn't been long, but I suddenly thought so because of the strange nostalgia.
We leaned backs against bed edge like before, side by side.
"We ended up coming."
Once home, Yamamoto-san was surprisingly subdued.
I expected her to pounce, but she fidgeted, tracing the floor with a finger.
"About earlier, that thing. The one that got kinda naughty."
Her phrasing was vague. I didn't catch what "that" was at first, but it was the bus thing, right?
It didn't just "get kinda naughty, " we had sex, no excuse.
But for her honour, I won't point it out.
"Was it... really safe...?"
Yamamoto-san, who apparently failed to hypnotise herself, worried about crossing the clear cheating line of "touching the male organ."
I had Miyu's instruction to do anything including sex, so no issue, but...
I don't know how much to reveal.
I can't say that Miyu permits everything.
"Of course, even 'make up no matter what' has limits. Specifically, if it happens, today only once... she said."
I have to tell her this, otherwise I won't know how much I'll be squeezed starting sex.
It should be a good decision to release this information, as it serves as a precaution while also clearing up Yamamoto-san's concerns.
"Wait, wait. Once what? Sex once? Miyu-chan told you it's okay to have sex with me once? What criterion? Once meaning one ejaculation for you?"
Like fish to water, she pressed eagerly.
Knowing clear permission for sex with her would resolve her pent-up frustrations.
She'd held back a lot.
"It's exactly as Yamamoto-san said. So, I was told to come back by the evening."
When I said so clearly, the light began to shine in Yamamoto-san's eyes.
"Conveniently interpreting, I can flirt with you till evening, and as long as ejaculation only happens once, I can have sex as much as I want... right...?"
"Y-Yeah, no mistake."
She didn't seem satisfied with just cumming once.
Girls' pent-up desire is hard to gauge, but if you replaced it with a man, it would be like banning masturbation for a week.
Well, this is what happens.
"Then... um... it may be a clear question, but..."
"It's fine. Ask me anything."
I'd resolved too. If within non-cheating, I'd indulge any request.
As the definition of cheating is left to each of the public.
Raw sex I'd refuse even with Miyu's okay, but otherwise, some perverted play is fine.
"For example... b-blow... job... may I... do it...?"
"Y-Yeah. Fine. She said let you do what you want."
I don't think blowjobs are something you 'let' someone do, but for service-oriented Yamamoto-san, that phrasing felt natural.
"I wish you had told me sooner..."
She probably meant, "If sex was okay, I didn't need to fret over all the earlier skinship."
I felt bad about that, but there was no way I could suddenly say "One blowjob is fine" back then. It was just how things flowed.
"But moderation is important, right? Miyu-chan probably hates flirting more than actual sex. I'll just do a little sex and call it quits."
Yamamoto didn't want to steal me from Miyu.
She had desires, but she didn't want a threesome either.
She just wanted to process her romantic feelings so she could genuinely support Miyu and me loving each other above all.
I admired how she hadn't lost sight of that. It was so like Yamamoto-san.
She'd said, "I want to be with you because I'm sure you won't make me do anything I hate," but this sense of security was also why I wanted to save her.
Still, just a blowjob instead of full sex.
That meant Yamamoto herself wouldn't get pleasure. Was that okay?
"Could it be that you don't have any condoms?"
"Hm? I do?"
Yamamoto, on all fours to give the blowjob, tilted her head in confusion.
She had condoms.
So she was avoiding penetration out of consideration for Miyu.
"No, I was just wondering if oral was enough."
When I asked, it seemed to hit Yamamoto's shame button and her face heated up again.
"Um... I want to give a blowjob... is that... not okay...?"
She asked apologetically, so I hurriedly denied it.
I'd made a girl feel embarrassed.
In that case, I should at least undress myself.
"Hmm... well... there is a reason I'm not doing full sex..."
Just as I reached for my zipper, Yamamoto let slip something intriguing.
It was probably out of care for Miyu.
Better not mention it.
"I love getting blowjobs too, so if Yamamoto-san does it, I'd be really happy."
As I said that, I unzipped my pants.
Yamamoto stopped me with her hand.
"I'm aware."
She didn't intend to strip me fully; like in the bath, she opened the button on my boxers and exposed my penis from there.
Starting from a non-erect state felt somehow embarrassing.
She already knew from the previous sleepover that I liked blowjobs.
Back then, in a similar position, she'd jerked me off while showing me old photos.
Because she looked so much like Miyu, I came easily.
...Better stop reminiscing or I might premature.
When Yamamoto brought her mouth close, her breath hit my glans, and I was half-hard instantly.
In the side-sucking position, her familiar earrings glinted near her ear.
"I tied my hair up so you can see my mouth clearly."
Her enthusiastic service made my heart soar.
Facing this beautiful girl who knew men's pleasures so well, even if just a blowjob, would my instincts survive unscathed?
"Then... this is Miyu-chan's, but... nom."
"Uu......!"
My shaft swelled inside Yamamoto's mouth.
Her tongue rolled it around, tentacle-like, licking the groove under the glans, cleaning off the sweat and smell from today's outing.
"Haa... Hyotomichi-kun's... dick... smooch... muchuu... nkuu... chyuru... gchuu..."
"Aaah... Yamamoto... you're really... amazing...!"
Once she took it in, Yamamoto-san sucked without restraint.
Her profile, side hair tied back, vividly showed her lips engulfing from glans to root.
Occasionally sticking out her tongue for long licks, her blowjob was so pleasurable I thought I'd black out.
"Jupu... kuchu... fah...... this smell of sweat...... chu... chubu...!"
"Ugh... guah... Yamamoto... san... ahhh!!"
Yamamoto-san's body, frantically fellating, contracted muscles with each bob, forming sleek lines on her arms and thighs.
Her ample breasts dangling on all fours, her butt straining her shorts.
Every part of Yamamoto-san's erotic body, including her mouth, gave me leg-melting pleasure with tongue and lips.
"Jurururu... jupu... nfu. No one's watching, so I can strip you."
She tugged her shirt collar provocatively.
"Ah, but... current Sotomichi-kun can't... muu."
Right after saying it, she realized I couldn't easily touch her on my own.
The great atmosphere almost swept me away, but if I went all out, I'd cross the out line.
If the roles were reversed, it'd be easy. Just do what I want.
But Yamamoto loves serving, so it's hard for her if the partner doesn't take the lead joyfully.
"I'm borrowing, so I can't complain, can I?"
"I can't say from my side. Ask Miyu how far is okay."
"Yeah. Please do."
Yamamoto-san happily kissed the tip of my penis.
"Aah... Sotomichi-kun's is really big... I love it."
Then she stroked the erection, cradling it lovingly with both hands.
Even this felt pretty good.
"Is it that big?"
"For me, yes. Most guys either finish in a flash when touched or without direct contact. Being able to suck one this big makes me happy..."
She looked genuinely happy and her words felt sincere.
That's why I couldn't ignore the slight discomfort.
"Is it really tough for Yamamoto-san if we can't have sex?"
During that week, she'd talked about her exes.
She said even without sex, just serving and making them happy made her fulfilled.
Whether true or not didn't matter.
But if I, the only one compatible, disappeared, she'd never be able to have proper sex with future boyfriends either.
That seemed too harsh. Maybe meddling, but if Miyu agreed, I thought it'd be good to satisfy Yamamoto-san fully.
"I was truly satisfied with past relationships. Back then, just serving was happiness. Small outings, eating my cooking happily, that was enough, I really thought so."
But, Yamamoto-san continued shyly.
"I'm... just a normal person too... so... when I actually had real sex with Sotomichi-kun..."
She hesitated.
Somehow guessing what came next, inexplicable guilt made my heart lurch oddly.
"Aah... sex is this fun... they enjoy it this much... and it feels... this good..."
It must have been an unwanted reality for her.
She might have wished she never knew.
"Before I knew it, Sotomichi-kun had turned me into a woman."
Oh, Yamamoto-san teared up.
Even then, she licked the underside, sucked the glans, fully enjoying the blowjob.
Did this mean I had to take responsibility?
"Uuuu... Sotomichi-kun...... haumu... chuuu... jubuzuzu..."
Yamamoto-san resumed the blowjob while lamenting.
Thinking this saintly girl sucking my cock had fallen into sexual slavery because of me sent a chilling thrill of depravity through my waist.
"I nweed your chuick cum... or I bwon't be sachisfied..."
Savoring every drop of precum.
"Haa... d-dangerous... ah..."
Her erotic sight made my lust demand release.
Only one ejaculation allowed with Yamamoto-san, so soon was unforgivable, yet thinking she craved my semen made me desperate to cum.
This was a side effect of sex with Miyu.
Most of my experiences ended in swallowing, so I was weak to suction-like blowjobs and cum demands.
"Njubu... gupu... jubuuu... jubuuu...!!!"
"Yamamoto-san...... it... feels... so good...!"
I wanted to cum in her mouth.
But asking was impossible in two ways.
Ending sex this quick would be unfair to her, and begging would betray Miyu's trust.
Wanting to cum in someone else's mouth might already be too late.
Still, I endured her service without saying I wanted to cum.
"Nh... chubun... kuhah... nh...?"
But my honest nature betrayed me without interrogation.
While caressing my shaft, Yamamoto-san stared at my face, reading changes.
"Sotomichi-kun... njuru, jup... want to cum already...?"
The direct question left me no room to dodge.
Feeling sorry to both, I nodded.
And as a result, of course.
"Nfufu... if you want to cum in my mouth... ahmu... jupap, jurururu, jupapa... nchuu..."
Yamamoto's face brightened instantly.
Sorry for ending early, but I knew she'd react this way.
She finds joy in others' happiness more than her own.
A request to cum during sex is the greatest pleasure for her.
"Nh, ngu... jurubu... nh... here, take this. Nfufu... nguguchu... jupu... gubo, gyuru... jupu... "
Yamamoto grabbed her phone from the table and browsed images while fellating.
It was the old phone where she'd shown past photos before.
Middle-school Yamamoto-san looked identical to current Miyu. Last time, I came using that as material.
So when she handed me the phone, I thought it'd be similar.
"Ugh... th-this is...!"
It wasn't just an old photo.
A close-up front view of Yamamoto-san, who looked just like Miyu, sucking a cock.
Whose dick was it?
Only for a moment did such a question arise.
"Nfufufu... kuchu... chupaa...! Jurujururero... gupujupu... jupuu...!"
"Aah... haa... Yamamoto-san... ah...!"
Her intensified blowjob tortured me with pleasure as my eyes glued to the image.
Yamamoto-san, looking like Miyu, sucking a penis.
It was none other than mine.
In the photo, facing forward with my cock in her mouth, she held another phone to her cheek.
Its screen showed the middle-school Yamamoto-san photo I'd used before.
And edited text: "I love Onii-chan♡"
The video made me flash back Miyu's face from the photoshoot.
"I can't... ah... Yamamoto-san... already...!"
It now looked exactly like Miyu's homemade sex selfie.
Showing innocent school images while revealing her lewd true self only to me, such an erotic little sister sucking my dick.
"Nju... anything... for you! Nh... chubujubu... guchu...! "
"Ah... haaa...! C-cumming... aaaaah!!"
Spurt, spurtt, spurt!!
With various feelings of guilt, I ejaculated in Yamamoto-san's mouth.
From balls through urethra, semen flooded those lips.
Oral cum somehow felt even more erotic than creampie with condom.
"Nfuah... you came a lot..."
I'd finally cum in a mouth other than Miyu's.
I'd had sex with Yuka at the meetup too, yet why this different guilt?
"Ugh... ngh... haa... tastes like Sotomichi-kun..."
Yamamoto-san blissfully swallowed my semen.
It felt both happy and lonely that someone other than Miyu had finally appeared who could casually swallow it.
But then she coughed violently and went for tea.
"Sorry."
"No, that's normal, and I'm used to it now, so it's okay."
She hadn't gotten pleasure herself, yet looked refreshed after our sex.
Maybe she syncs and calms when the partner cums.
"Came..."
Yamamoto gazed regretfully at my still-exposed crotch.
We'd only lasted about 10 minutes because I came with the flow.
But hours of this pleasure assault would break my mind instead.
"Um... for the time being, what's with this photo...?"
Yamamoto was playfully tapping my semi-hard shaft like a cat, so I left that to her and resolved the question first.
"I took it the last day with Sotomichi-kun. Edited bangs and eye corners to look just like Miyu-chan, saved it then as conversation fodder. Oh, and lightened the skin. Miyu-chan's fair."
Indeed, if Yamamoto styled her hair like Miyu and got that sharp glare, they'd look like sisters.
Breast development and skin glow were the same level too.
"Haah... fun time's over..."
Yamamoto-san still toyed with my dick.
It was starting to feel good again.
Only one cum allowed today, so I needed to think of something else.
"Speaking of, didn't you have plans to go somewhere today?"
Remembering Yuka's info, seeing Yamamoto-san's revealing outfit.
She'd spotted me just before the gate.
"Eh, ah... yeah... that's right. Now that I think about it calmly, I'm sorry about what I did."
After sex, she lightly handjobbed my supposedly finished penis.
Her big hands made handjobs feel great too.
I'm getting seriously horny. Better stop soon.
"D-did you have a date or something?"
"Yeah. A guy from my part-time job. We'd planned a date."
That's, well...
Hearing it made even me feel sorry.
"At first it was just dinner. Not sure if he meant it that way, but he invited me to hang till night. Thought it'd be good to forget Sotomichi-kun, so I said okay."
I see.
That explained the effort in her outfit.
Even if she hadn't intended it, that super erotic look would kill any guy instantly, did she consider that?
"I stood him up. Even now he's asking if evening's free... yet here I am having sex with another guy. I'm a horrible woman."
Perhaps remorse hit. Her chest ached, so she tucked my played-with penis back into boxers and zipped up.
Hearing this made it sound like I'd cuckolded all her past and future boyfriends.
Please spare me that karma.
"Well, Sotomichi-kun."
"Hm? What?"
This time, a question from Yamamoto-san.
Sex paused, we sat side by side in relaxed mode.
"Why were we having sex again?"
Silence filled the room for a while after that bombshell.
"To see if satisfying Yamamoto would clear her feelings, I guess."
"Right. But after dating and sex, my desire to be with Sotomichi-kun just grows."
Well, that's the reality, isn't it.
I hadn't heard Miyu's full plan either.
Assumptions are just assumptions.
"Haah... the more I calm down, the more sorry I feel towards Miyu-chan... what am I doing..."
Yamamoto-san's been flailing since falling in love.
Still loving must be tough.
"Let's disband while things calm down."
"Yeah. Let's do that."
There was still plenty of time until evening, but it would be less damaging for Yamamoto-san if I went home while the mood was still reset.
I grabbed the shopping bags and my wallet, headed to the door with Yamamoto-san seeing me off.
While wearing my shoes, I felt a faint tug on my clothes, but ignored it.
"Then... see you later."
"Yeah. See you around."
Yamamoto-san closed the door after I exited.
Last time was a sad farewell, but seeing her smile at the end reassured me.
I pushed the escalator button mindlessly and exited the entrance, where I was finally able to exhale.
I'd ended up enjoying sex with Yamamoto-san.
Even during the date, I was a bit attracted to Yamamoto-san as a man.
Would Miyu forgive this mess.
How much was planned.
On paper I followed orders, but briefly feeling real love might've been unexpected for Miyu.
Still, I'll tell her everything that happened today.
I walked home sluggishly under summer sun.
Had sex, so let's take a shower first.
I wonder how Miyu is doing.
"I'm home."
The door was unlocked, and when I entered the entrance, the cold air covered my whole body.
Based on this situation, Miyu's probably in the living room.
As expected, Miyu greeted me from there.
She wore a recently adopted oversized T-shirt housewear, with barely visible culotte pants fluttering.
The T-shirt was one of mine I thought I had discarded at some point.
"Welcome back. You're pretty early, aren't you."
Miyu in usual deadpan mode, but somewhat surprised at my early return.
I wonder if she thought that I would flirt longer with Yamamoto-san.
"I worked pretty hard."
There were things to reflect on, but I think it was quite a great thing to properly carry out the instructions.
And I'm pretty tired.
Been tense the whole time.
As expected, the sense of security at home and Miyu's cool demeanor are the best.
Any budding feelings for Yamamoto-san felt like they never existed.
"Uh-huh."
Miyu closely observed me as I took off my shoes, then quietly approached.
"If that's the case, let's reward you."
She stretched up to cover the height difference that the entrance step couldn't quite bridge, and pressed my head firmly into her breasts.
"Oh..."
I didn't understand what was happening, and for a moment, my heart stopped.
But I knew Miyu was hugging me.
I could feel her standing on tiptoes, almost losing her balance toward me.
Reflexively bending down, Miyu lowered her heels with a thud and patted my head.
"There, there. You did great."
The rich scent of Miyu's breasts filled my nostrils.
U-Unbearable.
Even though I'd just cum earlier, my lower part was getting hard again.
"Well, this should be enough."
Miyu patted my head for about 10 seconds before quickly pulling away.
What cold-heartedness.
"M-More! I want more!!"
"Your hair is damp with sweat, so go take a shower."
"Got it, I'll be quick."
It seemed like Miyu was in the mood for some intimacy today, so I immediately went to the bathroom, thoroughly washed my body, and changed clothes.
The sweat was gone, and I felt refreshed, like I was reborn.
Now I could hug Miyu without hesitation.
Hug my lover.
With all the drama lately, even something this simple made me savour the happiness.
No, rather, no matter what happens from now on, I must never forget that this is happiness.
I need to be grateful every day and pour in love every day.
...Though with Miyu, if I overdo it, she'll probably get mad.
"I'm done."
When I returned to the living room, Miyu was reading a fashion magazine on the sofa.
She was probably doing the same before I got home.
As I closed the living room door, Miyu patted the sofa seat to invite me over.
When I sat there, Miyu slipped in between my knees.
Given Miyu's personality who loves hugging, this position seemed to fit her perfectly.
"Onii-chan, you seem pretty okay."
"Okay? Well, a lot happened with Yamamoto-san, and we did... that stuff, but mentally, I barely held back."
"You did all that and still feel like this? Impressive."
"Was it that unexpected?"
"Of course."
Apparently, Miyu had imagined I'd come home more flustered and apologetic about Yamamoto-san.
When I explained the details to Miyu, she told me all my decisions were correct.
Things were progressing better than expected, and Miyu was in a good mood, so I thought about making a naughty request today.
"So, how should I handle Yamamoto-san from now on? No way it'll end with all three of us happily in love or something clean like that."
"Just keep it as usual? It's fine if you make a move on her a little."
"Really? Well, if that's the case, I'll do that."
I held Miyu in my arms and softly poked her arm as she continued reading the magazine.
This perfect fit of her body size is irresistible.
I wonder if it's okay to grope these soft, jiggling breasts bulging under the shirt.
"By the way, what were you planning to do if I actually fell for Yamamoto-san?"
"I had a special remedy prepared, so I'd just treat it with that."
Something like that existed?
As expected of my well-prepared little sister.
"What kind?"
If it's a remedy for falling for Yamamoto-san, it must be something dramatic enough to blow away that romantic illness.
Maybe a love letter overflowing with affection.
"Hmm."
Miyu folded the magazine, placed it on the side table, and took a breath.
Then, with a slight hesitation, she answered.
"A little naughty outfit."
The moment I heard those words, tremendous energy surged to my crotch.
It turned into blood flow rushing to my corpora cavernosa, and my dick stood perfectly erect against Miyu's back.
"Miyu, please."
"Don't wanna."
This back-and-forth.
It's nostalgic, but now's not the time to reminisce.
"I told you it was a special remedy."
"Wait. If you thought I'd come back more infatuated with Yamamoto-san, then originally, you planned to wear that outfit this evening. I object to my reward decreasing because I did well."
"Ugh... You're only sharp at times like this."
Miyu puffed out her cheeks in dissatisfaction, but she probably couldn't refuse.
After all, it was Miyu who told me to make up with Yamamoto-san, and since I followed her instructions and got results, she couldn't help but reward me.
Punishment for sins.
Repayment for favours.
She's the type who can't rest until she repays. I understand that best.
Of course, if she said it was repayment for past favours, I'd have no comeback, but Miyu wouldn't dodge like that.
"If you guess what outfit it is, I'll wear it for you."
A compromise from Miyu.
Treating it not as repayment but as a separate discussion on whether to fulfill my desire to see her in a naughty outfit.
Then I have no choice but to accept the challenge.
If I pushed hard for a reward for completing the task, it'd go through.
But I can't ignore such a cute challenge.
"Let's see. Since you mentioned treatment, maybe a nurse outfit?"
「…………」
From Miyu's personality, I figured she wouldn't pose a question without the answer in the text, like a reading comprehension problem.
Miyu puffed up her cheeks, looking utterly dissatisfied.
Somehow, it was a good reminder that we're siblings.
"It's an outfit that's embarrassing to death."
Why did she choose something like that when she bought it herself?
To be effective as a remedy for romantic illness, maybe it had to be that extreme.
Anyway, I'm not mature enough to pass up seeing my sister in such a mortifyingly embarrassing outfit.
"Miyu, I think that could be a preventive medicine too. Even temporarily, I almost seriously liked Yamamoto-san, so there might be a mutated love virus lurking."
"Well, that's true. It can't be helped."
Miyu looked a bit resentful but stood up from the sofa, convinced by my persuasion.
As she left the living room and went upstairs, she glared back at me, but even so, wearing such a mortifyingly embarrassing naughty nurse cosplay. Miyu really is the best partner.
It was a long wait.
All I heard from upstairs was the sound of the closet opening and closing. I wondered if she was changing now, or if she'd finished but was too embarrassed beyond imagination to come out. Thinking about that made my cock fully hard.
My pants felt tight.
Just the pressure from the erection was starting to feel good.
Even though I'd just showered, it was getting soiled with pre-cum again.
"U-um..."
"Whoa!? M-Miyu, you came down?"
I hadn't heard a sound on the stairs. She must have tiptoed.
Peeking from behind the door, Miyu had a nurse cap on her head.
S-So cute.
Just this was cute enough to jerk off to.
I never thought Miyu, who said she'd only wear lolita clothes, would do a classic cosplay like this. My brain was overwhelmed with joy and excitement.
"H-How is it?"
Even though she was only showing her face from hiding, asking "How is it?" I could only respond with all my feelings. It's cute.
Miyu had tied up part of her long hair, ponytail in the back, with only that part dangling as she tilted her body.
Far from a remedy, it felt like a lethal euthanasia. My dick twitched madly.
"So cute I might die. Seriously, I might die."
At that answer, Miyu gave me a half-lidded stare.
"Don't die when you see the body, okay?"
I couldn't promise that.
My heart was already pounding like an alarm bell, about to burst.
But I'd die happy if I could see it soon.
"My body looks like this."
She stepped her right foot out sideways, then brought her legs together to reveal her full body.
"Oh... ah..."
I gasped, my breathing stopped.
At first glance, it was a normal nurse outfit except for the ultra-miniskirt.
Just Miyu wearing a zero-leg-exposure outfit was destructive enough, but the eroticism wasn't in the shape. It was in the fit.
It was a skin-tight nurse outfit tracing Miyu's body lines perfectly.
While play cosplay outfits often have exaggerated large breasts, nothing off-the-shelf would perfectly fit Miyu's loli-with-huge-tits figure, so it was probably modified overall.
The jiggle of her breasts when she walked was smooth, like knit fabric pressed directly against them.
Miyu stood in front of me, just erecting on the sofa, and pulled her collar to emphasize the fabric.
"This outfit is a cheap cosplay costume I bought solely for Onii-chan's treatment."
"Ah... Aah..."
"Which means."
"Which means..."
"You can dirty it as much as you want."
"!?"
The moment I heard that, my brain flooded with fantasies.
Each one sent excitement to my lower abdomen, nearly making me cum just from that.
Not just erotic images flowing.
Thinking this could become reality, cumming endlessly on this super lewd sister, my rigid cock twitched, muscles contracting like during ejaculation.
"Miyu... i-is it really okay...?"
Breathing heavily, I asked. Miyu stood straight, eyes downcast, fidgeting her fingers.
"Well, it's disposable. Since I'm wearing it, you should use it."
"Ahh... ugh..."
Just hearing Miyu's voice made my penis feel good.
I couldn't stop the twitching.
"The shape of Miyu's breasts, so raw..."
"I'm wearing just this one layer."
"So no bra either?"
"No. It looked bad, so I put in cups though."
Miyu poked her chest with her finger.
The dent matched her breasts perfectly, and it looked insanely soft.
I want to grope them soon.
"Maybe no bra means... there, the breast part..."
I reached out, pointing, the spot where a bit of Miyu's plump breast skin peeked between buttons.
Because it's a cheap, non-authentic cosplay, all buttons aligned in the center on thin fabric. If pried with fingers, there was room for about one dick.
"Well, that's how it is."
Miyu used two fingers to pry open the top gap between the buttons.
From there, her cleavage squeezed into an I-shape peeked out.
"Ahh... M-Miyu...!"
She then pried the middle chest gap.
If Miyu knelt, I could thrust my penis in there as much as I wanted.
Just by imagining it, semen leaked out as if it had already ejaculated lightly.
"Here too."
One by one, downward, Miyu's underboob show.
Her glossy breast curves excited me beyond limits, forcing blood into my penis.
With my current upward-curved erection, I could ravage her breasts from that position.
"Really just one layer... meaning...!?"
Miyu opened gaps at her sternum, stomach, showing no innerwear.
Eventually, it moved to the lower abdomen.
Beyond the suspiciously short skirt fabric.
To the most important female part, barely hidden.
"This place."
Finally, Miyu hooked her finger on the bottom gap.
Facing me directly, thrusting her hips slightly.
Like a little girl peeing standing up, she spread wide the gap below her bladder.
Peeking out was smooth bare skin.
Flat, with only the slight mound of her pubic bone.
"It's like this."
Whispering secretly.
That voice intensely stimulated my penis.
"Ah... ahh...!"
Even pressing my pants hard, it was too late.
In my hand squeezing the urethra, my penis pulsed like my heart.
"Ah... Ah...!!"
Throb, throb, throb.
Finally spurting massive semen, my penis still wouldn't stop rampaging.
"W-wait, Onii-chan...?"
This was unexpected even for Miyu.
She looked worried at me suddenly clutching my crotch and going silent.
In that moment, I mumbled sorry repeatedly to Miyu, pathetically cumming in my pants.
With this surprise finish, neither of us could find words.
I just felt the sticky discomfort in my trunks and misery.
"Did you cum?"
Miyu asked not in her usual sarcasm,
But in a truly gentle voice.
I nodded, and she moved my still-pressing hand aside, silently unzipped me.
Without pulling down my trunks, she flipped them to expose half my groin, then...
"Hamu... churu... nh."
"Ah, ah... Miyu, that's dirty... aah...!"
She carefully licked off the semen on my clothes, on my skin.
Including on the penis itself, gently cleaning to soothe me.
"Th-thank you..."
"You're welcome."
Miyu cleaned the shaft with her mouth too.
I've gotten blowjobs many times, so it's not special.
But remembering she absolutely refused this early on, happiness welled up.
"By the way, Onii-chan."
Miyu pressed hard on the underside of my penis with her finger.
Still erect, it had fully recovered thanks to her cleanup blowjob.
"You can cum more, right?"
My testicles begin to reload quickly with Miyu's seductive smile.
I couldn't wait for the next sex.
To such a Miyu, I voiced my heartfelt desire.
"Is it okay to cum inside the outfit?"
It was a question with an obvious answer.
But since we're in this relationship, I had to ask.
"It's fine. Onii-chan."
Somewhat happily.
She replied.
My little sister was the best fap material.
Comments