Yuta Okkotsu's Little Sister's Cheat Is Remi

At the age of three, Yangu Huajiu got an intelligent assistant.

Huajiu named it "Duoya."

As a result, she learned many stories she was never supposed to know.

She hated how one of those stories ended.

But back then, she had no choice to change it.

Not until she turned ten.

"Do you want to risk it and get [Tau Mier]?" was the first choice Duoya gave her.

From then on, countless choices unfolded before her.

Interfere or stand by? Save them or let things be?

The consequences behind every choice, the price of every choice...

No matter what, she would pursue a happy ending!

*

There are a few elements from Zenless Zone Zero, but it's mostly just background.

The protagonist is 10 years old, with no romantic pairing.

Aside from Yuta and Rika, everyone is paired platonically.

Theme: Even kids can do great things.