Dad! what is this

Harry Potter rules the Dark with Lord Voldemort, Hermione Malfoy nee Granger McKinnon, lives in the Dark, happily with her family, Neville and Luna Longbottom run the ministry. Albus Dumbledore dies, the light is destroyed. How. It all started on. Hallows' eve. Again. When it all started with a game of Truth or Dare. And the parents recall old memories for their children.