Excellent beginning to a story. You make it sound like this is posted somewhere else, but i haven't read any before so i will give my fresh opinion:
You start of great, leaving the reader already trying to figure something out within the first few paragraphs. You are also leading us along with anticipation about something, but not quite enough info to figure it out. Since this is Harry/Ginny ship, i can guess where this might be going, but im not really sure.
Either way, I look forward to reading more.
I hope I'm not too predictable!
Thank you very much for the review - and I hope you continue to enjoy the story.
Chapter 1: Prologue: Sibling Rivalry