And Then There Were None

Information: This is a work-in-progress web-based visual novel engine. I'm playing with the idea of making Agatha Christie's "And Then There Were None" into a touhou-based visual novel.
What originally inspired this idea is the fact that Flandre Scarlet's theme is called "U.N. Owen was her", U.N. Owen being the name the murderer in the novel goes by.