Umineko no Naku Koro ni Murasaki: Forgery of the Purple Logic(うみねこのなく頃に紫 Forgery of the Purple logic) is a manga-exclusive series by Kurumi Suzuhiro. The story expands on the use of the Purple Declaration introduced by Bernkastel in Twilight of the Golden Witch. The Red Truth still applies in this game even though there are lesser than usual games. Knox's rules are stated in red to show that it is valid in this game. It has not been translated yet nor has it been licensed for release outside Japan. The story takes place outside the main story.