Missing

is a Japanese light novel series written by Gakuto Coda, with illustrations by Shin Midorikawa (Vol. 1 - 12). The series began publication on July 10, 2001 by ASCII Media Works under their Dengeki Bunko publishing imprint.

The first two volumes were licensed and released in english by Tokyopop before being discontinued.

Synopsis
Kyoichi Utsume, a.k.a. "His Majesty, Lord of Darkness," is a dark and compelling mystery, so much so that his fellow Literature Club members would rather discuss him than books! When "His Majesty" vanishes in front of their very eyes, his friends are left with several unanswered questions: what is the source of Kyoichi's long-standing obsession with the "other side"? And just who is Ayame, the eerily ghostlike girl Kyoichi brought to school as his girlfriend the day before he disappeared?

Light Novel Volumes

 * The Light Novel has been released under MediaWorks Bunko since May 2020.

Manga
The manga adaptation of the light novel: with art by Rei Mutsuki. It was released under the Dengeki Comics imprint from June 2005.