Premise: Saiyuki (最遊記 , Saiyūki ) is a manga series by Kazuya Minekura which was serialized in "G-Fantasy" from 1997 to 2002. It spawned multiple manga sequels, anime adaptations, video games and other media. The story is loosely based on the Chinese novel "Journey to the West".
Hypothesis: Kazuya Minekura knows the story of "Journey to the West"