Replaced by an AI Sister

Summary

My parents adopted an AI daughter.

The day they brought her home, I suddenly became the problem child.

My father called me a disappointment, and my mother decided I couldn't compare to Zya. My brother, Lucas, was the worst.

"All you do is take things from us! Why can't you be useful for once?" he'd snarl.

Heartbroken and furious, I once pushed Zya to the ground.

My mother's face went cold. She slapped me so hard my ears rang.

"Zya is your sister! If you were even half as obedient as she i