My Clingy Yandere Stepsister Turned Out to Be My Ex’s Twin Sister

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Ryota Iida, Second-Year High School Student.

One day, my girlfriend suddenly asked to break up with me.

Turns out, she was a germophobe—couldn’t handle kissing, hugging, or even holding hands with a guy. I still wanted to make it work, but she completely shut me out and walked away.

Heartbroken, I was on my way home when I saw my ex being attacked by a group of thugs. I jumped in to help… but the girl I saved wasn’t actually my ex. She just looked exactly like her.

Her name was Yuzuki.

And as it turns out—she was my ex-girlfriend’s long-lost twin sister.

Around the same time, my dad announced that he was getting remarried.

His new wife’s daughter?

None other than Yuzuki, the girl I had just saved.

And so, my new life began—living under the same roof as Yuzuki.

“Hey, Onii-san… wanna do it?”

Unlike her prim-and-proper older sister, Yuzuki was an openly flirty, dangerously seductive gal—at least when it came to me.

Every night, she would sneak into my bed. She kissed me, hugged me… and before I knew it, I had gone all the way with her.

“Everything Onee-san never let you do—I’ll do it for you. So… let’s make a baby, okay? ♡”

And just when I thought things couldn’t get any crazier, Yuzuki transferred into my class.

Right in front of my ex, she clung to me, sweet-talking and doting on me like I was her boyfriend.

And for some reason… even my ex, the one who broke up with me, started coming after me too.

But it was too late.

Yuzuki was everything I never knew I needed—caring, affectionate… and insanely good at both cooking and that.

She had already stolen my body and soul.

And now, I could never be satisfied without her.

Associated Names
One entry per line
My Clingy Yandere Stepsister Turned Out to Be My Ex’s Twin Sister ~ The Day My Germophobic Girlfriend Dumped Me, a Gal Who Looks Just Like Her Became My Sister. But It’s Too Late to Turn Back—This Little Devil of a Girl Gives Me Everything You Never Did, and Now I’m Completely Addicted to Her.
俺に甘えてくるヤンデレ義妹が、元カノの妹だった~潔癖症の恋人に振られた日、瓜2つのギャルが妹になった。今更もうやり直せない、君がさせてくれなかったこと全部してくれる小悪魔な彼女に身も心も奪われてるから (Web Novel)
俺に甘えてくるヤンデレ義妹が元カノの妹だった (Light Novel)
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Latest Release

Date Group Release
02/16/25 Zetro Translation c6
02/15/25 Zetro Translation c5
02/15/25 Zetro Translation c4
02/14/25 Zetro Translation c3
02/14/25 Zetro Translation c2
02/14/25 Zetro Translation c1
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Not Porn Folder
New Not Porn Folder rated it
June 18, 2025
Status: Completed
Its a mess in every possible way: The characters suck; The story does not make sense; and its honestly rage inducing.

I love it.

Reading this novel is like witnessing a car accident. Its a bad time, but you can never stop looking at it and sticking around until the situation ends.

Overall the novel is a good read for some recreational rage.
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