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

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.