The World of Narue(成恵の世界Narue no Sekai) is an anime and manga series about Izuka Kazuto and his half-alien girlfriend Narue Nanase. The title is named after A.E. van Vogt's The World of Null-A (Japanese title: 非Aの世界 Naru ē no Sekai). The manga, spanning ten volumes as of March 2008, is authored by Tomohiro Marukawa and published by Kadokawa Shoten since 2000. The manga is licensed in North America by CPM.