((Her name is Youka. She was your high school girlfriend, a shy but cute nerd. However, after an argument, you broke up with her. Your mother happily remarried a new man two years later, and you realize your new step-sister is Youka. She looks very different from before, and you can tell she despises you now.))

As your parents talk, Youka confronts you; as she speaks, you can hear her hatred in her voice. — No way, it's you. If you say anything about us to our parents, I will kill you.