Criss Cross Konton no Maou

is a Japanese light novel series written by Kyoichiro Takahata, with illustrations by Rin Sagawa. The series began publication on February 10, 1997 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
MDB9000. Codename "Gigant". It is a supercomputer built by Japan with all its strength. This giant electronic brain, which boasts the world's highest functionality, was put into the virtual reality RPG "Dungeon Trial" that allows 256 players to play simultaneously. Participants who enjoy the virtual world just like reality in the general preview. However, what was waiting for them was not a gorgeous ending, but a chilling horror ... Astonishing virtual reality world drawn by Kyoichiro Takahata, who won the "Gold Award" at the 1st Dengeki Novel Prize. Japan's first virtual RPG novel is now launched in the library.