M'kay, I was drinking a cup of tea and thinking about this book and the ending of Death Note: Another Note and Agatha Christie's And Then There Were None, and an explanation popped into my head for the varying depths at which the young women were buried. More specifically, an explanation for
the way one girl in particular was found
. If I'm right, 1) whoa, weird mystery novel logic is finally seeping into my brain and 2) I hope Shimada has a good explanation for why the character did that.