Coincidence is not something that happens frequently. Part I

"There are three of us in our house..."

Because I do not know which part of my memories I forgot, my sister informs me about it from the start, just in case I remember anything.

"You and our eldest brother were the children of...um, the first wife." My younger sister's face becomes slightly paler before she continues. "I was the mistress' child. However, after our father died, there was no one to send money to support my mother, so she took me to our grandmother. That's all there is to it. You didn't like me in the past—"

"Skip the bleak chapter of my past right now!" I quickly object... I used to hate my sister so much that she was the person I despised the most. I teased her because of the chuunibyou and the self-centered way I lived my life. I wish I could go back in time and smack my own head.