My Little Sister Is the Best F*p Material - Volume 8 Chapter 03: The Ideal Girlfriend and the Naughty Sister

Volume 8 Chapter 03: The Ideal Girlfriend and the Naughty Sister

While brushing my teeth after breakfast in front of the sink, I stared blankly at my reflection. Before summer break, I thought of myself as a plain, unattractive guy, but now, even with a toothbrush in my mouth, I didn’t look half bad. Clothes and haircuts—once a mysterious world to me—turned out to be worth the effort once I tried.

“People really do change,” I muttered, spitting toothpaste into the sink.

Miyu had changed too. That deadpan face of hers could melt into sweetness. Normally, she’s as cool as ever, looking uninterested in men, making it easy to forget how she can cling to me.

Wonder if Miyu’s going out today.

I returned to the living room to ask. She sat primly on the sofa, long lashes fluttering, still groggy from her weak mornings, fiddling with her phone.

A calm, low-energy, busty sister. A hardcore brocon—born to kill me with gap moe.

“Plans for today?”

She perked up like an antenna, her large breasts, bra embroidery visible through her white T-shirt, turning toward me as she answered.

“I’ve got one last job with Haruka, so I’m heading out.”

She glanced at the wall clock.

Last job, huh? She’s tying up loose ends.

Seeing her so composed, I figured it was time for me to do the same.

“Then I’ll head out at some point too.”

Chatting casually, I sat beside her on the sofa, leaving a fist’s width of space.

Her low-energy distance never changes. I wanted more natural, couple-like affection, but…

“Miyu.”

“Yes?”

Her reply was businesslike as always. Edging closer, I reached out to hug her but hesitated.

“…What? Feeling threatened?”

“It’s not a threat.”

Her deadpan made me quip dryly. Without arousal, physical affection was tough. I’d gotten nervous, but hugging her so proper and composed felt off. Timing matters.

“I like how easy to read you are. You don’t have to try so hard.”

She read my thoughts perfectly. I knew she didn’t like forced moves, but my lingering virgin mindset made me want to show off my manliness, even if it meant overreaching.

“Then, I need advice.”

“What?”

“I want to take affection naturally. How do I do it well?”

When in doubt, ask honestly—that’s my way of trying.

“Just give in to your lust.”

She tilted her head, puzzled why I’d ask something so obvious.

“What about normally?”

“Normally?”

“Like, right now, for instance.”

“When neither of us is horny?”

Yeah, that’s it.

“No need for it, then.”

“Huh…?”

I thought casual affection was the easiest path to a couple-like bond.

But nope.

My sister’s dry as hell.

“Haruka texted.”

Checking her phone, she stood and headed to the bathroom. Time to go, apparently. I had no urgent plans, so I’d stay put on the sofa to avoid bothering her.

Where to go, though?

I hadn’t hit anime or game shops lately. A dose of that could be nice—station area would do.

“Onii-chan.”

Focused on my phone’s map, I heard Miyu call. She’d left the living room but came right back.

“Can you stand?”

“Hm? Oh, sorry.”

Thinking I’d stepped on her stuff, I stood and looked around—nothing.

“What’s up?”

“I’m gonna show you how hard affection is without lust.”

A surprise demonstration. Why the sudden change?

But this exchange—from my question to her odd behavior—felt so us. Perfect sibling communication.

“Teach me, sensei.”

“I’ll make you understand.”

She walked toward me, her breasts brushing my ribs as she closed the gap. The height difference highlighted her curves, her cleavage like glossy mochi under her chin. Folding her arms to emphasize it, she just looked up at me.

“Uh… what do I do?”

I expected her to make a move, but no. Just her, small and adorable, standing there.

“You have the right to hug your sister.”

An invitation. Her words screamed, “Hurry up and hug me.”

“No holding back, then.”

I wrapped my arms around her small frame—soft, sweet-smelling, warm with a girl’s heat.

“Then you think, ‘I’m so lucky to hug such a cute girl.’”

I’m so lucky to hug such a cute girl.

“And, ‘Hugging my cute sister’s getting me horny.’”

Hugging my cute sister’s getting me horny.

“Then, the horny you whips out your junk.”

“Nope.”

That’d be the usual routine.

…Am I always doing that?

“But you’re getting horny?”

“A bit.”

Not enough to need release, though.

“If I begged for a kiss, what’d you do?”

“I’d melt from your cuteness.”

“Then kiss me.”

“…Really? It’s okay?”

She nodded. Her wide eyes looked like she genuinely wanted it. Half-impulsively, I hugged her tighter and kissed her.

“Nn…”

A sultry sound escaped her. My heart raced, an unfamiliar thrill. From dry banter to kissing in an embrace—my lower half stirred in response.

“Nn… chu, puha…”

Her face flushed slightly as we parted.

“Can you do that from your side?”

“No way.”

A loving kiss from a neutral state? That moe only happens when she initiates, when my dry sister begs for it. Seeking affection without lust feels unbearable pictorially. Expecting girlfriend vibes was a mistake.

“Let’s keep going.”

Blushing shyly, her voice carried a sweet plea. The lesson was over—this was just her begging for kisses. Too cute.

“Got it.”

Drawn to her neediness, I kissed her again, nibbling lips repeatedly. Lust inevitably surged, and pathetically, my lower half sprang to life.

“See? Affection makes you horny.”

Between kisses, she whispered breathily, lips barely parted.

No way I wouldn’t get turned on. Kissing’s part of sex. But could I stay calm with just a hug? Doubtful.

“And, Onii-chan,” she paused, continuing, “you want affection without lust, but have you considered how I feel being touched?”

It hit me—I’d overlooked something crucial. I wasn’t the only one aroused here.

“Can’t leave my sister hanging, right?”

“Exactly.”

Her instincts make her more prone to arousal. Even casual touch could leave her too wet to go out.

“I don’t mind solo play, but too often is a hassle.”

“Got it. I’ll be careful.”

Affection comes with lust. You need to be ready for sex if it escalates.

“By the way, every couple’s the same—less lust, less affection.”

News to me. But yeah, I’m just extra quick to get horny for her. Guys want to touch girls when they’re pent-up.

“…So, what now?”

We were both fully aroused.

“I’m taking my payment for teaching you, so do whatever you want if you need to cum.”

“Wait, whoa—!?”

She pushed me onto the sofa, straddling me.

“Onii-chan.”

Like a succubus starved for energy, she purred sweetly and forced her tongue into my mouth.

“Juru… chuppu… nn… nfu… jururu… jupa…”

Her ravenous kissing paralyzed me, spine tingling. Matching her assault, her hips ground against my erection, rubbing her clit on my tented pants, moving solely to sate her own desire.

“Haa… haamu… nchu… juru… chupu… ah… n-ah…!”

It wasn’t sex—it was Miyu masturbating using my body. She wasn’t thinking about my pleasure at all, but her raw, honest desire only turned me on more.

“Fwaa… ah… Onii-hyan… n-ah… ah… mu… chubu, jururu… puhaa… Onii-chan…”

Each kiss made my cock swell harder, amplifying her pleasure. I could feel my pants soaked with her love juices against my sensitive tip. It was so erotic, I felt like losing my mind.

“Naaa… nn, nnn… ah… AH…!!”

Before I could time my release, she came without warning. My male body was consumed to sate my sister’s lust.

“Fuu… haa… I came…”

Regulating her breathing, she sat up, breaking our close contact.

“All good.”

She looked satisfied. Without semen, cumming seemed to fulfill her needs enough. Otherwise, masturbation would be a vicious cycle. It made sense mechanically.

“Miyu, does this mean I don’t get to finish?”

“If I suck or swallow, I won’t make it to Haruka’s.”

As expected. Should I just give up?

“You really want your sister to make you cum?”

Her expression said, I’ve got an idea.

“I really want my sister to make me cum.”

“Can’t help it, then.”

Touching my cheeks, she leaned in, peering into my mouth.

“No holding back.”

What followed was unreal. Prying my lips open with her tongue, she ravaged my mouth with relentless kisses. Her tongue moved like a separate creature, teasing sensitive spots—my tongue, my palate—with perfect timing.

It felt like she was pouring all her pent-up love into me. Each sweet swirl of her saliva made my cock twitch.

This is bad… I’m gonna cum from her kisses…

What should’ve been reversed—her making me cum—was nearing its end with her overwhelming love.

“Nn… haa… ah… Mi-yu… nnn…!!”

No physical stimulation to my cock, so I couldn’t resist. It was like my brain’s ejaculation trigger was being directly attacked. Each lick pushed me to release.

“Ah… aah… ah…!!”

Once it started, I couldn’t stop. Tears streamed as she kissed me through multiple orgasms. My sister’s kisses alone made me cum repeatedly.

“Haa, haa… ugh… aah…”

My pants were so drenched, I couldn’t feel the semen—just a warm, wet mess.

“Hm? You came?”

“Y-Yeah… I came…”

Lost in kissing, she hadn’t noticed she’d made me cum repeatedly.

“Ehehe. I can’t clean up your semen today, so wash your own pants.”

Happily, she skipped upstairs to her room. I was so thoroughly drained, I considered skipping my plans.

“Time for a shower…”

While she got ready, I hand-washed my semen-soaked pants and cleaned up. Changing under sunlight felt refreshing. A crisp morning.

But still…

Even after such a lovey-dovey exchange, we were more siblings than lovers. That didn’t feel bad—it fit us perfectly. Right now, I was happier than ever. No complaints.

Yet, that nagging feeling…

A lingering doubt from my date with Yamamoto-san stuck in my mind. The “girlfriend vibe” I thought I didn’t care about—I couldn’t stop noticing its absence with Miyu.

I needed a distraction. Solidifying my resolve to go out, I saw Miyu, ready to leave, descend in a lolita-style outfit coordinated for Haruka. Her blouse, stretched over her large chest, and the dress’s open neckline were insanely erotic.

“Something up?”

Checking herself in the hall mirror, she brushed her eyebrow with her pinky, mindful of her skirt’s drape and blouse’s wrinkles.

“Just… I’m so glad you’re my sister.”

I’d been to a love hotel with this adorable sister, getting intimate and even creampieing her. The fleeting joy of her calling me “Onii-chan” there would stay with me forever, recalled every time I saw her daily self.

“Onii-chan.”

Done with her check, she turned to me.

Had she read my naughty thoughts again?

“I’m glad I’m your sister too.”

With a subtle smile, she offered generous words to her shameless brother. Caught off guard, my heart fluttered, and I was struck by how deeply I’d fallen for her.

“See ya.”

“…H-Have a good one. Be safe.”

Waving, she left, her heavy chest swaying.

Staring at her afterimage, I stood frozen in the hallway.

“Hmm…”

Alone in the empty space, an inexplicable unease churned my thoughts.

I was missing something important. It started at that love hotel date—a subtle but significant fact. All I’d noticed then was how soft her breasts seemed, but that was normal…

“Huh!?”

No way. Could it be? Knowing Miyu, I’d assumed she’d make some move if it were true. But in the train, at the spa, in the hotel—she was like that.

“If that’s it…!”

I dashed upstairs, bursting into her room. My heart pounded like it did our first time, despite the brief sprint.

My target: the cylindrical bin by her bed. I knew digging through trash was wrong for a decent guy, but her hints were too blatant to ignore as her brother.

Step by step, I approached. Inside were used tissues and a colorful checkered paper bag, sized for folded underwear. I, a guy, had no clue if lingerie like Miyu’s was even sold in stores.

But this was it. No doubt. Trembling, I picked up the bag and opened its folded top.

“Ah… aah…!!”

I found it.

“No way… really…?”

I pulled out a white tag with small text, clearly marked “H65.”

The item listed cup and underbust sizes. Her slim underbust was still 65 cm, but her cup size—

“Miyu…”

My sister had officially become an H-cup girl. In plain terms, her breasts had grown.

“It happened… that much…?”

Why didn’t I notice sooner? Regret hit, but a creeping fear explained why.

I’d thought if she reached H-cup, I’d never touch her breasts again. So, at the hotel, despite all the sex, I avoided paizuri.

But Miyu’s feelings had shifted. She’d been signaling me—her H-cup was meant to be used. Unknowingly, it had become a tool to make me cum.

“What a naughty sister.”

Crushing the bag, I was rock-hard.

“No way I can handle this…”

I wanted to laugh at myself. She’d drained me so much, my balls were empty, not even precum left.

“…”

Yet, I was erect. Just from her H-cup revelation. Sad as it was, I was thrilled.

“Miyu…”

I had to masturbate—not out of duty, but respect. In her room, I dropped my pants, gripping my impressively swollen cock.

“Fuu… ugh…”

How long since I’d jerked off? With Miyu, I’d been spoiled, always having a gorgeous girl (her) to relieve me.

Still, my body existed for her. Thinking of her for release made my cock livelier than forcing sexual thoughts.

Even my cock’s growth proved it—sized perfectly for her H-cup breasts. No other explanation.

“Haa… haa… Miyu… damn, too erotic…”

My hand wouldn’t stop. No fear of her anger. Even well-meaning mistakes, like botching an anniversary gift, could upset a lover. For my shameless sister who loved my lust, this wasn’t a sin.

What mattered wasn’t right or wrong, but owning my actions.

“Ugh… Miyu…!”

Stroking furiously, climax neared. No breasts or panties in sight—just the fact of her H-cup driving me wild.

“Haa… fuhaa… Miyu… I’m cumming…! NGH…!”

I slipped the bag over my cock like a vagina, unloading inside.

Each dopu stained the bag, seeping through.

“Fuu… haa… haa…”

I’d done it. No regrets—well, maybe some, but sage mode hit hard.

Calmly, I realized I’d messed up. Pulling up my pants, I returned to my room, tossed the semen-scented bag, and flopped on my bed.

She’ll notice the bag’s gone…

Masturbating was fine, but cumming in the bag was insane. How do I explain? Cumming on her panties might’ve been understandable, but I hadn’t even touched them.

At least tell her I noticed the H-cup.

I texted her: You got bigger, huh?

Her reply came fast: Indeed, that’s a very important fact for me.

Weird phrasing, like a machine translation.

Another text followed: However, messaging your sister en route to a friend’s house for no urgent reason suggests guilt you can’t handle alone, I presume.

My blood ran cold. My thoughts were an open book.

Sorry, I jerked off.

On the bra?

Didn’t use the lingerie.

Then why?

Fair point. Of course.

Can’t explain, but the lingerie’s safe.

Unclear, but good to know.

Our cryptic chat piled up—a viral SNS post if I could share it. Never would, though.

By the way, since you messaged, what do you want for your birthday?

Confession over, topic shifted.

“Oh, right.”

I’d forgotten—my birthday was near. I’d only ever gotten cash from parents, so nothing came to mind.

A ticket to do whatever I want with you for a day.

My honest desire.

You’ve got guts saying that after this.

I mentally groveled to my phone. Not the best follow-up to apologizing for using her breasts as fap material.

Another buzz: I’ll think about it.

What a brocon sister.

“Right.”

Regaining sanity, I prepped to go out. Aimless wandering felt like a slacker move, but I wasn’t in the mood for gaming or studying.

Yamamoto-san’s situation was unresolved, but waiting for her was fine, right? Or should I ask her out? A distraction was my goal, but meeting up if she’s free could work.

For now, prep to go alone and check in.

I texted Yamamoto-san: Morning. What’re you up to today?

A bit couple-y for my taste. Changing and grabbing my wallet, her reply came: Morning! I’ve got plans. What’s up?

No big deal. Just remembered we talked about seeing fireworks.

Without thinking, I recalled our past chats. Summer’s ending, so big firework shows are scarce, but some places do them year-round.

Then I’ve got a plan! Can I pick the date?

She’d already scoped something out. Despite her busier schedule, we set a date around her.

On the bus to the station, I reviewed our chat. Other guys couldn’t even dream of such casual texts with Yamamoto-san. She made me realize how lucky I am.

Since that time at her place, we’d gotten comfortable talking again. Blurring the lines of who dumped who with these daily chats might be part of Miyu’s plan. Making one last summer memory could lead to a friendly, amicable bond with Yamamoto-san again.

(Wandering aimlessly around the station when I’m free… is that really all I’ve got going on?)

Looking back, I hadn’t hung out with guy friends outside of meetups. Wonder what Takami’s up to—probably grinding at club activities. How’s Suzuhara doing with Harumaki-san? They might be free. Might as well ping them.

I shot off messages, and Suzuhara replied fast. Everyone’s quick on the draw today.

“Yo, you free!? Perfect, come out tonight!”

“Some kind of event?”

“Sorta, not really. Mixer?”

“Huh?”

Digging deeper, Suzuhara hadn’t sealed the deal with Harumaki-san but turned meetup connections into mixer buddies. Even dragged Takami into it.

I’m not one to judge their lifestyle, but I’m not joining a mixer. About to reply when I got pulled into a group chat with both.

“Finally, Sotomichi’s in!?”

“Nah, I’m out.”

“Why not, man? Summer’s almost over. Lose that virginity already.”

What a mess I’ve stumbled into.

“Unlike you, I’m already swimming in it.”

Oh? Takami’s reached that level? He’s athletic, so he’s got the charm.

“This guy goes for anyone, even the plain ones.”

“Don’t wanna hear that from a zero-win-rate loser. The last girl was cute, by the way.”

“Ugh… that one still pisses me off, even if it was a fluke.”

The convo’s rolling without me.

“It’s from stacking small wins. You’re too hung up on looks. My club stamina keeps me solid at night, but you holding up, Suzuhara?”

“Shut up! You’d be high and dry without my invites! That last sex tape you showed me was infuriating!”

“You can’t piston like that and make a girl cum, lol.”

“Time to swap out the roster tonight.”

“Oi!”

Ugh, seriously. These guys were nerdy otakus before summer—how’d they end up like this? I’m not one to talk, though.

“Sotomichi, say something!”

“Whatever, do your thing. I’m out.”

“Wait! Just try it! One time!”

Ignoring his lame pickup-line vibes, I left the group.

Gaining life experience is great. They’re growing more mainstream than me. They sound like they’re having fun. Still a virgin in their eyes, huh? Fair enough. I can’t talk about Yamamoto-san, Miyu’s my sister, and the others are younger.

But with Yamamoto-san, if we’d become real lovers, I could’ve bragged. Everyone’s dream girlfriend—having been with her, I can vouch there’s no lie to her reputation. With her, any future feels like guaranteed happiness.

Miyu’s my ideal, but her lolita-busty uniqueness and the taboo of being my sister make it impossible to flaunt. She’s likely in the same boat. Does she tell people her brother’s her boyfriend? What does she think about our future?

That’s where my anxiety about the lack of “girlfriend vibes” comes from. Yamamoto-san’s hotel talk about “dating Miyu showing there’s room for other girls” makes sense now. If we define happiness as peaceful lives, being with separate people is a valid choice. Calling Miyu my lover always brings this issue.

(…I’ve already sorted this out, haven’t I?)

I’ve learned to think for myself. I know all this, love Miyu deeply, yet this unshakable unease—what is it? Is my worry that trivial?

“Oh…”

Aimlessly walking after getting off the bus, I’d ended up on a familiar café street. Near lunchtime. Maybe I subconsciously chose this spot hoping for something.

“Gonna charge you for consultation.”

A voice from behind. Turning, I saw Yuka, slightly mature with lip makeup, standing defiantly with her grumpy twin-tails.

“You like me or something?”

“That’s my line!”

Yuka glared sharply, as always. Behind her was Sachi.

“Been a while.”

“Yes, it has.”

Sachi’s warm, spring-like smile eased my foggy heart. Her presence alone turned the space into a haven.

“What brings you two here?”

Predictable question. Before Sachi could answer, Yuka cut in.

“Tutor, food.”

Confirming my guess with minimal words, Yuka eyed Sachi and yanked my arm to start walking.

“You don’t have big plans, right? Let’s eat.”

“Alright, alright. I’ll come, no need to pull.”

She dragged me to a typical café restaurant, quiet for the time. The staff said to pick any seat, so we chose a corner sofa.

“Study going well?”

Yuka’s been hitting the books with Sachi, apparently.

“Yuka-chan’s got a logical mind—she deduces answers quickly. Teach her a method, and she nails it.”

“Guess she’s got a knack for efficiency.”

“Doesn’t feel like a compliment, but it was easy. I don’t get why others struggle.”

Yuka flipped through the menu confidently, showing it to us briefly before calling the waiter. Deciding time’s up, huh?

“So, grades shot up?”

“They have… a lot. Since, well, the starting point was… rough.”

“What’s that mean?”

Yuka glared. Her tests were usually a sea of red, a remedial regular with tons of room to grow.

“Yuka-chan isn’t into studying itself… history’s a weak spot.”

“Your history notes were useless.”

Sachi winced, holding back tears. Sciences, while memorization-heavy, follow logic, so Yuka could internalize methods through reasoning. History’s stories, though, are tough if you’re not interested.

“Forget that. Since we’re here, let’s do a catch-up session.”

Yuka slammed the table to shift topics. Her dragging me here meant she had something to share.

“Any developments?”

“How about Sachi-chan starts?”

Sachi’s progress…?

“She got a boyfriend or something?”

Right after ordering, before even appetizers in a bar setting, a bombshell topic dropped. I’d heard something similar from Sachi before, but back then I was too wrapped up in my own stuff. Now, it stirred complicated feelings.

“Total drama.”

Drama implies multiple guys, but Sachi wouldn’t…

“Yuka-chan, don’t phrase it to mislead.”

“But it was drama.”

“It was, but…”

It was? I’m blessed myself, and while I’d feel lonely, I’d congratulate Sachi if she found someone. But drama? Sachi with multiple guys? No way… or maybe, because it’s Sachi? No, no. As a sensible senior, I should stop such reckless dating.

“Let’s grab drinks first.”

Yuka paused her own topic dramatically. We’d ordered the drink bar, so we grabbed drinks and sat back down.

“So, Sachi. I assume it’s a misunderstanding, but… you’re dating multiple guys?”

Bypassing Yuka to keep things moving, I asked directly.

“I’m not dating anyone. At least, I don’t think so.”

Sachi looked away, sipping sugary coffee.

“What’s ‘at least’ mean?”

“Well… I told you before, some guys confessed to me, right?”

“Yeah, I remember.”

Sachi’s matured a lot since we met, getting fervent attention from tutor guys.

“She’s kept all of them on hold.”

Got it. The situation’s clear.

“I’ve never been in a relationship, so I won’t learn without trying. I want to date, but…”

“Too many options to choose?”

“Uh, no…”

Glancing around to ensure no tutor peers were nearby, she leaned in, whispering.

“I couldn’t bring myself to want any of them.”

She sighed apologetically.

“Then just reject them all.”

“I said the same thing.”

“But then I might never get confessed to again…!”

I’d forgotten—Sachi’s like me, lacking self-confidence. I totally get how love-awkward people fall into that mindset.

“With Sachi like this, she’s got a bunch of self-proclaimed boyfriends while keeping them on hold.”

“That’d cause drama.”

“Ugh…!”

Sachi looked down, eyes crossed. She’s not entirely a victim here.

“Sachi’s a femme fatale. She’ll surpass Miyu someday.”

Sounds like a hot shonen battle arc, but I want Sachi to have a calm, happy home life.

Still, everyone’s moving forward. I want to share my life too—with Miyu’s classmates, Suzuhara, maybe Yamamoto-san.

“Actually, I’ve got a consult—”

“Ahem! Cough, cough!”

Yuka cleared her throat loudly, winking aggressively.

“Anyway, I’ve got something to say.”

“Wait, wait! You heard Sachi, so pass the convo, duh! Group chat skills: C-minus! Instant fail at interviews or mixers!”

Ouch, ranked harshly. Maybe I should’ve gone to that mixer for some lessons.

“Sorry, got carried away.”

Yuka’s emotions are so readable, it’s fun, and I slipped in a pointless response.

“I know what I’m doing. Teasing me with Sachi here—sure you don’t like me?”

Like or not, I definitely like her.

“Hmph. Fine. That special feeling for Yuka-chan’s gonna drag you to rock bottom.”

Haha, no way.

Wait, my chest’s tightening.

“Sachi, tell me this isn’t a story I should avoid hearing.”

“If it was, I’d have warned you. It’s fine.”

“Good to know.”

“Don’t wrap it up yourself! Ask already!”

Her real reason for dragging me here was this story.

Fine, let’s hear it.

“Got a boyfriend, Yuka?”

Popularity aside, I thought she’d sworn off boyfriends until high school.

“I did.”

Firm declaration.

Alright, how’s she gonna spin this punchline?

“How’d it happen?”

“Brace yourself—I got confessed to.”

“No way, that’s shocking.”

“Can’t blame you.”

She flicked her twin-tails smugly. A confession leading to a boyfriend seems ironclad, but is there a twist?

Sachi stayed silent, observing. Maybe it’s a “boyfriend, but…” situation? A long-distance online guy, a girl posing as a guy, or a dating sim romance?

None fit Yuka’s personality. If she really has a boyfriend, I’d be shocked, but I’d congratulate her—grandly. Anyone who’s known her long would. Maybe her whole class should throw a party. She’s earned that loyalty.

“What’s he like?”

“Dunno… probably cool and nice.”

Sounds shaky already.

“Online guy? How much have you talked?”

“No, you’re misunderstanding something fundamental.”

What’s to misunderstand?

“I’m saying it’s basically like having a boyfriend.”

Give me back my worry…!

“So, you got confessed to but didn’t say yes?”

“That’s a yes.”

“Then you don’t actually have a boyfriend. That ‘concerning that question’ bit is intriguing, but digging into it will just complicate things, huh?”

“So, did you turn down the confession?”

“I haven’t turned it down.”

“So, you’re keeping it on hold too?”

“Sort of, yeah. On hold. Well, close to it.”

If even “on hold” isn’t quite right, what’s this story about?

“Sachi.”

Time to move on.

“Yuka-chan got a love letter and is thrilled about it.”

“Why drag it out this much?”

“Don’t put it weirdly. Sure, I got a love letter, but I’m not thrilled.”

Yuka’s lips curled despite her denial. She’s happy. A guy’s confession is something she’s always wanted but never got. Compared to me, who shut out relationships, this must feel like a huge win.

“Who gave it to you, and how?”

“Don’t know who. It was in the desk I usually sit at in tutoring.”

“Then it might not even be for you!”

“No, hold on. I get your doubt, but it’s definitely mine.”

As the bar for “having a boyfriend” kept lowering, I got too excited, but Yuka stopped me, rummaging through her bag.

“Here’s proof.”

She placed a Western-style envelope on the table. Her name was indeed written on the front.

“This… looks like a love letter…”

“Yeah. It’s my first time seeing the real thing too.”

Sachi hadn’t seen the letter itself either. She’d already dismissed it as not worth taking seriously. Sharp girl.

As food arrived, Yuka started eating silently while we peered at the envelope.

“Hey, Yuka.”

Something caught my eye.

“This has a neatly placed seal. You haven’t opened it, have you?”

Yuka set down her knife and fork from cutting steak, slowly looking up.

“Of course I haven’t.”

Her tone was heavy. As expected, but why?

…Wait. Think calmly. Her embarrassment when Sachi said she was “thrilled” about the letter. Maybe Yuka’s so overjoyed by the confession she doesn’t know how to handle it?

This whole exchange, unlike her usual boldness, might stem from her confusion. Yuka’s unbelievably innocent about love. I know that best from our amusement park date.

“Can I open it?”

“Why would that be okay?”

“If it has a reply deadline or a meetup date, you might miss a real confession chance.”

“What—!?”

Yuka snatched the letter, frantically peeling the seal, then gently resealed it and placed it on her lap.

“…What’s up?”

“Well… what if it’s not what I expected…?”

Yeah, that’s probably the real reason she couldn’t open it.

“Yuka-chan, be brave!”

“Yeah, you’ve got this. You’ll bounce back.”

“Don’t assume I’ll fail! …Fine. The kind, cool mystery guy who confessed can stay a beautiful memory.”

Yuka’s bravado faded, her gaze dropping.

Fair enough.

“What’s with that look?”

“Just… that’s a valid way to think.”

“Yeah, I won’t judge. Happiness comes in different forms.”

“Your kindness stings.”

Regaining some composure, Yuka handed me the letter.

“If it’s not a love letter, I’m skipping afternoon classes. You’ll comfort me.”

“I’ll take responsibility.”

No reason to, but sure.

“Here goes.”

Carefully peeling the seal, I opened the folded letter. Sachi and I read the dense, small text together.

“Hmm… ‘You’ve always given me energy, and I realized I love you… Lately, you smile more, and seeing your expression or hearing your voice makes my heart race. I can’t look away. Before graduation, I had to confess…’ Wow…”

“S-S-Stop reading it out loud…!”

Yuka’s ears turned red. Never thought I’d see her like this.

“Definitely a love letter.”

“Yeah.”

It was a painfully sincere confession.

“Who’s it from?”

“No sender’s name.”

“Why!?”

Yuka grabbed the letter back, scanning it desperately. As the letter mentioned, they’re graduating soon. A relationship wouldn’t last long, so confessing and moving on is a respectable choice.

“Ugh… feels like a hit-and-run…”

“Use a purer expression.”

“But it’s a proper love letter, right? It made my heart swell reading it.”

Yuka seemed unsatisfied, and the story didn’t quite land as a punchline, but I was genuinely happy she was recognized as a girl.

“So.”

Yuka propped her elbow, shoving meat in her mouth with her fork. Bad manners.

“What’s your consultation?”

Finally, my turn.

“Well…”

Wanting to shift the awkward flow, I took a breath. I wanted to talk about Miyu—how I’m dating her but can’t feel the “girlfriend vibe.” I just want to confess that vaguely. I don’t even know what my issue is. But talking with Yuka and Sachi made it clearer.

“It’s about Miyu. I’ve been thinking…”

Imagining being with Sachi now, even this meal would be filled with sweet, flirty moments. Same with Yuka—her girlish side from our amusement park date, showing that smile only to me as my girlfriend, vividly comes to mind. But with Miyu…

“Even when I’m with Miyu, it doesn’t feel couple-like. No girlfriend vibe… I can’t explain it well. It’s not a big deal, but it’s nagging at me.”

As I fumbled through my words, Sachi seemed unsure how to respond.

“Ugh, and here I was expecting something big. Lame.”

Yuka, straw in mouth, sounded exasperated.

“It’s a serious issue!”

“Hmph. Looks like I will need that consultation fee.”

Yuka pulled a receipt from a plastic holder, snapping it upright between her fingers. Where’d she learn that trick?

“But Yuka-chan, considering Onii-san and Miyu-chan’s relationship, it’s not that simple. Siblings and lovers…”

“That’s the issue.”

Yuka cut straight to the core.

“Why does Miyu need to be your girlfriend?”

What kind of question is that?

“She is my girlfriend.”

“But she doesn’t feel like one to you, right?”

“It’s about the feeling… Yeah, maybe I’m not fully convinced she’s my girlfriend…”

Talking it out, I can’t deny it. The unease of labeling Miyu as my girlfriend. Am I just hung up on societal norms?

“I’m talking about status. Why demote her from sister to girlfriend?”

“Demote…?”

What? I don’t get it, but something clicked.

Is that it?

“Anyone could be your girlfriend—me, Sachi, any random girl. But you only have one sister. She’s irreplaceable.”

One sister. Undeniable truth.

“You’re in love with Miyu, your sister. And face it—”

Yuka’s gaze pierced me.

“You’re a hardcore pervert who only gets off on his real sister!”

My heart thudded.

“I’m…”

Not a pervert.

Not… a pervert…?

“What do you think, Sachi?”

“Me!? Uh… I think Onii-san’s dependable, but…”

Sachi hesitated.

My palms were sweaty.

I might’ve been completely wrong.

“When you said you thought of Miyu-chan during sex, it does make me think… maybe you’re a pervert…”

I’d lost sight of it. Everything I’ve done with my sister—pure perversion. This morning alone proved it. Since our relationship started, every moment, undeniably.

“Your relationship is nothing but perverted siblings. Not getting that makes you fret over dumb stuff.”

As expected from Yuka, the original “unwholesome” crew. Having been in that circle, she pinpointed my issue instantly.

(That’s it… I love my sister…!!)

Finally, the fog cleared. I could move forward.

“Yuka, thanks.”

I scarfed down my food, left cash for all three meals, and stood.

“And Sachi too. Without meeting you both, I’d be lost.”

What a strange twist of fate. I’d never felt so grateful for connections. With a clear view, I saw my path. This time, I’d be the one supporting someone.

“I’ll always cheer for you!”

“Whatever, but hang out with me sometimes.”

“Got it. Let’s eat like this again.”

Feeling my phone vibrate, I left the restaurant.

Yamamoto-san’s message about our date’s schedule glowed on the screen.

I shielded my eyes from the blazing sun.

This hot summer’s almost over.