My Clingy Yandere Stepsister Turned Out to Be My Ex’s Twin Sister [Dropped] - Chapter 06: A Pure Angel in Public, A Seductive Devil at Home

Chapter 06: A Pure Angel in Public, A Seductive Devil at Home

It had been ten days since my stepsister, Yuzuki, transferred into my class.

This morning, I had early practice for club activities.

After losing a game of rock-paper-scissors, I got stuck with mopping duty.

Once I finished, I headed back to the boys’ locker room.

“Yo, Ryo-chin~ Good work out there~”

Inside the locker room, there was a girl with short hair.

Her chest was surprisingly big, and her thick thighs made her curves stand out.

She had sharp, double-lidded eyes, and a playful fang that gave her a mischievous look.

She was sitting on a bench, casually flipping through a shonen manga magazine—

One that I had brought with me.

“Yotsuba. What the hell are you doing? This is the boys’ locker room.”

This girl was Yotsuba Niekawa.

My childhood friend—

And my eternal pain in the ass.

“There aren’t any boys here, though?”

“I’m right here, dumbass.”

“Yeah, but you don’t really count as a guy, Ryo-chin.”

What the hell was that supposed to mean…?

She was sitting cross-legged on the bench, completely relaxed, flipping through my manga magazine.

Nothing about her posture screamed “17-year-old girl.”

“Can you seriously just buy your own damn magazines?”

“Our household has strict financial policies, Ryo-chin.”

She casually turned the pages of my Jump Magazine, completely unbothered.

“Man, Digimas is so good right now. Don’t you think so too?”

“You can just take that one, so get out already. I need to change.”

“Oh, I don’t mind. Go ahead~”

“I’M the one who minds, dumbass.”

She wasn’t moving.

Not one bit.

Sigh… Guess I’ll just change quickly and get this over with.

“Oh yeah, Ryo-chin, about your stepsister—”

“Huh? Ah… yeah.”

Yotsuba asked while still flipping through the manga.

“She’s already, like, crazy popular in class, huh?”

Since Yotsuba and I were in the same class, she obviously knew about Yuzuki.

“She’s all bubbly and playful, like a little puppy. Laughs at everything, super bright and friendly with everyone—Oh, and she’s got huge tits. Yeah, no way a girl like that wouldn’t be popular.”

It was true.

Yuzuki was loved by both guys and girls.

At this point, she had basically become the class idol.

“She got a boyfriend yet?”

“No…”

“Hah?! No way! With that face, that body, and that personality? She should have at least one or two boyfriends by now! C’mon, c’mon! You live with her, so you must know something, right?”

I had just finished changing, and when I turned around—

Yotsuba’s eyes were practically sparkling.

“She doesn’t have one.”

“Pfft, lame. Well, I guess she does seem pretty hard to get.”

“Y-You think so?”

“Yeah. She’s, like, constantly flexing her brocon side, isn’t she?”

Yuzuki was really popular in class.

Guys hit on her all the time.

And every single time, she answered with—

“Sorry, but I already love my Onii-san~♡”

She said it so casually.

Of course, no one actually took her seriously.

“Cute, big boobs, AND a brocon? Damn, that’s like, peak male fantasy.”

…So basically, everyone just thought she was a harmless brocon.

“By constantly playing up the ‘brocon’ thing, she’s actually pushing guys away. But I can tell—that’s just a strategy. A cover-up to hide her real target.”

Even when Yuzuki clung all over me in class, none of the guys ever got jealous.

“Well, they are siblings.”

“Man, they’re such a close-knit pair.”

“Iida’s her brother, so obviously he’s not a romantic option for her.”

For now—

No one suspected anything when Yuzuki stuck to me like glue.

“She’s definitely got someone she likes.”

“…Yeah, probably.”

“Doesn’t that bother you?”

…Well, considering that someone was me, there wasn’t really much for me to say.

“C’mon, Ryo-chin, let’s head back to class.”

“Yeah, yeah.”

I grabbed my manga magazine, and we left the locker room together.

“While Yuzuki-chan’s popularity keeps shooting up, your ex seems kinda… out of it these days.”

My chest tightened for a moment.

She was talking about my ex-girlfriend—Mishiro Azusagawa.

“She used to be, like, insanely popular. Always kind to everyone, smart, super polite—people even called her the ‘Angel.’ But lately, she’s been different, y’know? Feels kinda off. Like, whenever someone talks to her, she’s just not there.”

That was true.

Ever since Yuzuki transferred in, Mishiro had completely changed.

She used to be loved by everyone in the class—

But now, she was starting to rack up haters.

“As her ex, does that bother you?”

“H-Hah!? N-No, it’s whatever…”

…Still, it was hard not to notice how Mishiro had been acting lately.

Something must’ve happened.

“…Huh. So you still can’t forget about her, huh?”

“What? What did you just say?”

“Nothing at all~.”

With a loud smack, Yotsuba slapped my back.

“C’mon, get it together! If you’ve got problems, just talk to Yotsuba-chan! Oh, wanna go on a date?”

“Let me guess—on my dime, right?”

“Damn straight! No other way!”

“Yeah, hard pass.”

“Tch, so stingy~.”

She laughed loudly, making it easy to relax around her.

“Y’know, out of all the girls, you’re the easiest to be around. You don’t even feel like a girl.”

“…”

For just a second, Yotsuba’s expression went completely blank.

Then, she immediately grinned again.

“Shut up. Now, c’mon, let’s go back to class!”

…What was that pause just now?

★

After school ended and practice wrapped up, I finally headed home.

“Ryota-kun~! Welcome home~!♡”

Right away, Yuzuki ran out to greet me.

At school, she always called me “Onii-san”.

But at home, she always made a point to call me “Ryota.”

“Oh… yeah.”

With that angelic smile, she called me Ryota, and it was impossible not to see Mishiro overlapping with her.

Even when I told her to stop, she never listened.

“The bath is ready~♡”

“…I’m good.”

For certain reasons, I really didn’t feel like taking a bath.

“Nooo way, Ryota-kun~!♡ You were sweating soooo much at club today!♡”

The clubroom showers were shared among all sports teams.

Since our school was a powerhouse for athletics, we had tons of student-athletes.

Which meant—

The showers were always a battlefield.

Yuzuki, still smiling, stepped closer.

I tried to lean away, but she pressed herself tightly against me.

A sweet fragrance drifted into my nose, and before I knew it, she was gleefully pressing her chest against me.

“Snuuuuu~~~~~…♡ Haaaaa~~~~~…♡ Onii-san’s sweat… it’s so naughty♡ Just sniffing it makes me go into heat~♡”

Her eyes sparkled, practically filled with hearts.

Like a beast in heat, she nuzzled her nose against my chest, writhing against me in an eerie, seductive way.

I gulped.

Her soft body, her sweet scent—it was all making my head feel light.

But—

No.

With all the willpower I had left, I pushed against her shoulders.

“See? That’s why you need a shower~♡”

“…Yeah.”

Dragging my heavy feet, I headed for the bathroom.

I tossed my dirty shirt and laundry into the hamper, then stepped into the bath.

Click—

I locked the door behind me.

Then, without wasting another second, I let the cold water hit my head.

“…”

The bathroom was filled with a sweet, intoxicating scent.

Yuzuki always used the bath before me.

And because of that—

The entire room was flooded with that intense floral fragrance.

The problem was—

It smelled just like Mishiro.

Click—

The lock disengaged.

Again?

With a heavy sigh, I turned around, already half-expecting it.

“Ryota-kun~♡”

“…Yuzuki. How many times do I have to tell you to stay out?”

It had been ten days since we started living together.

And for all ten days, this girl had barged into the bathroom while I was bathing.

I locked the door every time.

But she somehow always found a way in.

…She was using a coin to pop the lock open.

Damn it! Who designed bathroom locks to be so useless?!

“Get out.”

“Nope~♡”

At school, she was the perfect angel.

Bright, friendly, and obedient.

That’s what everyone thought.

But I knew the truth.

“You see… Ryota-kun~♡”

With a flick, her towel slipped.

A flawless, naked body stood before me.

Pure white skin without a single blemish.

Unrealistically large breasts.

And—

A thin strip of soft hair at the base of her thighs.

“Nnn~♡ Your eyes are so naughty, Ryota-kun~♡”

I shouldn’t be looking.

I knew that.

But—

Her face, her voice, her body—

They all belonged to Mishiro.

And I couldn’t look away.

“G-Get out!”

“Noo~♡”

“Then I’ll get out!”

I shoved past Yuzuki, ready to leave the bathroom.

But from behind, she suddenly wrapped her arms around me.

“…Are you sure?”

She whispered into my ear, her breath sending a shiver down my spine.

“You really don’t want to look? At Mishiro’s… naughty little body~?♡”

“Tch—You’re not Mishiro!”

I turned around, only to see Yuzuki grinning devilishly.

At school, she wore Mishiro’s smile—sweet and angelic.

But at home—

She smiled like a devil.

Only for me.

“Say, Onii-san? Why are you resisting?”

“Because we’re siblings, damn it!”

“Exactly~♡” 

She giggled, stepping even closer.

“And since we’re siblings… there’s nothing wrong with bathing together, right~?♡”

Then—

She nibbled my ear.

A chill ran down my spine.

“Aha~♡ Ryota-kun’s so big~♡”

“—!”

Yuzuki’s eyes lowered, locked right onto my crotch.

I instinctively pulled my legs together to hide myself.

“It’s sooo big~ And such a naughty shape~♡ You must’ve made sooo many girls cry with this~♡ Aaah~ So lucky~♡ Onee-san got to have it first~♡ I’m sooo jealous~♡”

Her wicked smile sent a deep chill through me.

Jealous? Of Mishiro…?

“Don’t be stupid… That’s impossible.”

Mishiro was a germaphobe. She wouldn’t even hold hands without gloves.

There was never a chance.

“I see… Onee-san is so mean, huh? She’s got such a naughty body, teasing Ryota-kun like that~ but never letting him use it~♡”

“T-The one doing the teasing… is you, damn it!”

“Fufu~♡” Yuzuki giggled, pressing closer.

“It’s okay, Ryota-kun~♡ You can take all those desires that Onee-san refused… and release them inside me instead~♡”

From behind—

She wrapped her arms around me.

Thump. Thump. Thump.

My heartbeat pounded in my chest like a drum.

That skin, so smooth it felt like silk—

Those soft, perfect breasts, pressing against my back—

And her voice—

A sweet devil’s whisper—

Exactly the same as Mishiro’s.

“Onii-san~♡ If looking at your little sister like this is getting you all big and hard… then go ahead~♡ Stuff that throbbing thing into your sister’s body~♡ You’ve been holding back, right? Let it all out~♡ It’ll feel soooo much better than just using tissues~♡”

I almost—almost wavered.

But—

I shoved her off and stormed out of the bathroom.

“Aww~ Too bad~♡”

Mishiro’s face. Mishiro’s voice. Mishiro’s body.

But—

Saying the things Mishiro never would.

Giving me the things Mishiro never could.

A girl with the same face as the one who rejected me—

Yet completely ready to take me in.

I was going insane.

Every. Single. Night.

It never stopped.

It was hell.

A hell where I was trapped with a devil—

And I was the only one who knew it.