A Man Who Lost Confidence, to a Gentle Chastity-Reversed World

Chapter 23: Washing and Being Washed with My Sister ☆

My thoughts freeze. A sister suggesting we bathe together is something I’ve only seen in adult manga. And this sister, standing before me, is as cute as an idol.

“I haven’t told Mom yet, but I wanted to check if it’s okay with you, Shun-nii. What do you think?”

Not “yet”—she shouldn’t tell her at all, I think, the premise itself absurd. But Yuki doesn’t seem to be considering that.

“…B-bathing with my sister… maybe when we were little, but now, Yuki, you’d hate it too, right…?”

In early elementary school, maybe, but now that we’re grown, society wouldn’t allow it. Above all, bathing with the beautiful girl before me requires immense mental strength.

Escaping with “you’d hate it” makes me a coward. Yet Yuki looks at me with upturned eyes.

“Shun-nii, would you hate bathing with me…?”

Her words weaken me. If I could ignore everything, refusing to bathe legally with a girl would be insane.

I don’t think Yuki’s tricking me, but I can’t help wondering if she has some ulterior motive.

“I-it’s not that I hate it… I just don’t understand why…”

Yes, that’s key. I need to know why she suddenly suggested this.

“…I just thought I want to get closer to you, Shun-nii.”

She gives a pure answer, smiling softly. But wanting to get closer doesn’t equal naked bonding, and doesn’t she feel embarrassed?

Maybe I should’ve asked when she washed my back before. As I spiral, she peers at my face, perhaps sensing I’m not refusing.

“If you don’t mind… let’s bathe together later, okay?”

With that, she heads into the house toward her room. Stunned, I feel the conversation rushed forward.

I want to believe it’s a joke, but I also hope it’s real. Even if she’s my sister, she’s a beautiful girl, and I can’t deny feeling lust for her soft body.

I spend the evening in turmoil, eating dinner with vague emotions. Yuki and Mom act normal, but I’m on edge.

I half-hope Mom would stop this, reassuring me. But Yuki doesn’t seem down, so my predictions flicker and fade.

So, I scarf down dinner and retreat to my room. I didn’t ask about timing, or if Yuki will call me, clueless as ever.

I don’t know her feelings, but bathing with my sister feels wrong for me. Throwing away lust and bathing first might be best.

Then she might give up. So, earlier than usual, I head to the bathroom. I know I’m escaping, but I lack the mental strength to face it.

“…Sorry.”

Muttering to myself, I open my door and check the hall. Yuki’s door, across from mine, is closed. Seizing the chance, though guiltily, I pass by.

“…Shun-nii? We’re bathing together, right?”

At that moment, her voice rings out behind me, as if she’d been waiting. I flinch, turning back stiffly like a toy.

Naturally, Yuki, holding her clothes, stands beside me, saying, “Let’s go!” There’s no escape.

“Shun-nii, you were gonna sneak to the bathroom alone, huh? I said we’re doing it together.”

Pouting but playful, she pulls my hand. Caught at that moment, I’m dragged to the first-floor changing room.

“Mom said it’s fine, and it’s been a while, so I’m excited!”

As she speaks, she grabs her T-shirt.

“Y-Yuki! W-wait, not so fast…!”

I panic, but it’s too late. She pulls off her T-shirt, revealing a vast expanse of beautiful skin.

“It’s a bath, so we have to undress, right…?”

She says, blushing slightly. If she’s embarrassed, I wish she’d hold back, but I can’t stop looking.

“I’m happy you’re looking… but staring that much is kinda embarrassing…”

Noticing my gaze, she looks down slightly. But I can’t tear my eyes from her upper body, barely covered by a simple white bra. Still growing, her body has feminine curves.

Her breasts have a slight swell, her waist soft yet free of fat, exuding healthy eroticism. Seeing my lively sister in such a state excites me.

“…Come on, Shun-nii, hurry and undress…!”

Embarrassed, she urges me, her bra-clad breasts jiggling slightly as she blushes.

I keep thinking, if she’s embarrassed, why suggest this? I don’t understand, but I give in and start undressing. At this point, I have no choice but to bathe with my sister.

Having had her wash my back before, I’m somewhat prepared. Still, her gradually disrobing figure is undeniably stimulating.

When I’m down to my boxers, she slides off her shorts, revealing matching white panties with a frilled waist—unmistakably girly.

“Unsho!” she says, pulling off her shorts and reaching for her bra’s clasp. The motion feels agonizingly slow to me.

The bra’s straps and cups lose support, falling away, revealing her breasts to me.

“Shun-nii, you’re really staring… it’s kinda fun.”

She doesn’t cover herself, standing before me. This would never happen in my old world.

It’s crude to compare, but her breasts aren’t as large as Asagi-san’s. Still, their small size balances cuteness and eroticism. Her small, vivid pink areolas and tiny, peach-colored nipples are beautiful.

“…”

She glances at my face and lower body. My erection is obvious through my boxers, but she doesn’t scold me.

With a “Yosh!” she seems to resolve something, reaching for her panties. My sense of stopping her has vanished.

With a shurushuru sound, her panties slide down, slipping off her fingers. Now fully naked, she faces me.

Her lower body is slender, her legs long and lean. The erotic triangle at her center, hairless, shows a clear slit. Not fully mature, her body, becoming womanly, melts my brain.

“So… what do you think…? I don’t have much hair… maybe I’m not grown-up enough, but… does it make you feel bad…?”

She asks for my opinion with upturned eyes. Evaluating my sister’s pussy is beyond me. I can only offer simple, honest feelings.

“Um… it’s really pretty and… cute, I think…”

Losing vocabulary, I manage to convey my thoughts. She looks relieved, murmuring cutely, “Ehehe, good…”

“Come on, Shun-nii… let’s go in.”

Emboldened, she urges me to remove my last piece. But my penis is fully erect in my boxers, making me anxious.

A beautiful sister—only a fool wouldn’t get hard. Does she notice? Maybe this world lacks that perspective.

“…O-okay…”

Resolving myself, I pull off my boxers in one go, trusting she won’t call me dirty.

My erect penis springs out with a burun, catching her eye. She lets out a silent “…!” staring at it.

She blushes slightly but says nothing more. Thus, we stand naked in the changing room, a scenario unthinkable even in my old world’s AVs, almost too erotic.

Resigned, I reach for the bathroom door to learn her true intentions. Yuki hurries after me, nearly tripping.

“Ehehe, bathing with Shun-nii feels nostalgic…”

Her cheerful voice aside, I realize I forgot a towel as I turn on the shower. We’re both naked, with nothing to cover us.

Questioning her feels wrong, and if she’s fine like this, it’s tough on my sanity, but I have to endure.

She likely just wants to talk and bathe purely. I’m the one harboring lust and weird expectations.

Yes, this is sibling bonding, I tell myself, suppressing dirty thoughts and false hopes.

“Then, Shun-nii… I’ll wash you?”

She prompts me to sit on the bath chair. This is her communication, I reprimand myself.

Taking a sponge, she starts lathering my back. Her touch is perfect, almost cleansing my heart.

“…Shun-nii, does it hurt? Okay?”

Her concern draws a shaky “I-it’s fine.” It’s a mundane sibling exchange, yet our grown bodies make it feel erotic.

Then she pulls the sponge away. Thinking I messed up, I hear her lathering again, this time by hand.

“Coming to the front…”

She moves to my front, hands foamy, confirming my guess. But her naked body so close makes it hard to hide my excitement.

As she crouches, her small breasts form a slight valley. I’m obsessed with breasts, easily aroused, and my erection strengthens. She glances at my penis briefly.

“…Okay, I’ll start with your shoulders.”

Shaking it off, she washes my upper body. Having been washed before, I endure it. She lathers my torso and legs silently, without issue.

Up to that point.

“Then… I’ll wash here too…?”

Incredibly, she starts massaging my balls. I flinch, feeling pleasure I can’t stop.

As a brother, this is wrong, but I only moan “Ugh…” She checks my expression and the feel of my balls, her fingers moving to my hardened penis.

“Y-Yuki… not there…!”

The space turns lascivious instantly. I know she shouldn’t do this, but I can’t resist the pleasure.

Her fingers wrap my erection, decorating it with soapy foam.

“It’s all slippery… feels weird…”

She moves her hand with curiosity. I’ve experienced handjobs in this world, but I’m not used to it, especially with the new sensation of soap.

A girl, a beautiful girl, my sister, stroking my penis—I’m nearing my limit. My balls, kneaded, feel full, and I know it.

“Ah, Shun-nii’s thing is twitching… is it gonna come…?”

She looks at me with upturned eyes, her hand relentless. Her cuteness contrasts with her servicing my penis.

Dirty thoughts and her slender fingers quickly drive my semen to the tip. I’ll dirty her if this continues, but it’s unstoppable.

“Yuki… sorry, I’m coming! Ugh…!”

With a byurubyuru, my semen spills out. Knowing it’s too fast, I can’t hold back.

“Ah, Shun-nii’s…!”

The semen splashes onto her forehead and hair, shocked expression and all. Her beautiful skin and black hair are coated white by my filthy desire, prolonging my release.

Surprised, she closes her eyes, accepting the semen. As the flow weakens, it drips to her cheeks and mouth, turning her cute face lascivious.

“Nn, Shun-nii’s semen…”

When I finish, she’s sticky all over. Yet, eyes closed, she seems to smile.

I’ve done it again, letting lust make her service me. She’s my sister, no matter who started it.

“S-sorry, I got carried away again… your face and hair, it must feel gross…”

I ask cautiously. She opens her eyes, looking puzzled.

“Why? I started touching you, so I don’t think it’s gross.”

Licking the semen from her lips like it’s ice cream, she looks at me casually.

“If you felt good, I’m happy… but, ugh, maybe I’ll rinse my hair. Ehehe, Shun-nii, wanna wash it?”

She rinses my penis with the shower and suggests this. I agree hesitantly. She sits, turning her back to me.

The semen in her hair makes me feel guilty. I rinse it carefully but clumsily.

“Ehehe… getting my hair washed by Shun-nii makes today a special day.”

As I lather her hair, she speaks happily. I worry if I’m washing it right, massaging her scalp slowly.

“Maybe seven years ago… the last time we bathed together, you weren’t into it. I was excited, but you kept looking away in the tub.”

I listen, moving my hands slightly. Her tone turns slightly lonely.

“Since then, you barely talked to me. We hardly had conversations… so maybe, just a bit, I felt lonely.”

How arrogant was I to reject her desire to talk? Even in this world, I’m not someone to be proud of.

“But lately, you’ve been so kind! You used to act like you hated talking to girls… but now you’re getting close with them.”

She speaks brightly until “…so,” when her voice trembles.

“…So, seeing you hugged by Yamamoto-san today, I got jealous. I pushed you to get close to Asagi-san, but I was jealous. I thought I needed to get closer to you too, in a way only I can, living in the same house… so I suggested bathing, but…”

You’re so kind for not hating it, she continues.

“Hey, Shun-nii, compared to Asagi-san, I’m not cute or mature, but… I want you to hang out with me too, even just a little.”

Back turned, she shares her feelings.

I don’t know the right response, but lying or rejecting her is wrong.

“…If you want, Yuki, not just talking… going out together, I’d be really happy… is that okay…?”

She turns, smiling over her shoulder, both cute and mature.

That gem-like smile directed at me, as a man and brother, is the greatest joy.

“Thanks, Shun-nii… okay! Time to rinse my hair!”

Slightly embarrassed, she prompts me. Rinsing away the semen, her black hair feels smooth and almost sacred.

“Ehehe, next, my body, please.”

She slides the body soap bottle to me but doesn’t hand me the sponge, despite it being nearby.

Touching my sister’s body directly—is that okay? After such serious talk, can I handle this lustful act?