My Kurumi Isn't Tsundere

I transmigrated into the world of Date A Live and became Kurumi Tokisaki's older brother.

No golden finger, no System interface, not even a sign-in function.

The only upside is that my little sister Kurumi throws herself into my arms every day and calls me "Onii-chan."

I have to go with her to the school festival, make two servings of lunch, and help her brush her hair...

I'm getting more and more used to this ridiculous setup.

Until one day, she turned beneath the moonlight, a golden clock face appearing in her pupils.

"Brother," she said, "when did you figure it out?"

It turns out the scariest thing isn't having no System. It's realizing that my little sister's "everyday life" has all been an act for my sake.