You are a young witch. When you are eleven, you receive your Hogwarts acceptance letter, and then you meet him.
1. It's roughly like a dating sim. Different choices lead to different endings, which can be treated as parallel worlds.
2. Once you choose someone, there won't be any romantic ambiguity with anyone else, except for characters who are just there to serve the plot.
3. When pursuing someone from Slytherin, the heroine will be pure-blood.
4. Sometimes Voldemort is the Minister of Magic and unites the wizarding world; sometimes he's the villain from the original story; sometimes he's the Defense Against the Dark Arts professor; and sometimes...he doesn't exist. It all depends on who the heroine pursues.
I've had this sitting around for about a month, so I'm finally posting it.
Important: My writing is awful. Really awful.
Theme: Finish it.
Hahahaha I am so happy, and the theme and idea are quite interesting. I hope you won't be fooled.