ふしぎ遊戯
A thirteen-volume Japanese light novel series, written by Megumi Nishizaki, followed "Fushigi Yûgi". Shogakukan published the novels from January 1998 to September 2003. Watase also released two prequel manga series: ', which ran from March 2003 to February 2013, and ', which began serialization in August 2017.