Mukaii Kouku

is a Japanese light novel series written by Harumi Mizuochi, with illustrations by Kaya Kuramoto. The series began publication on December 10, 2000 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
"Let's forget everything and sleep. Close your eyes, curl your limbs, fall into a deep illusion, and dream sweet and sweet like chocolate-" A girl who refuses reality and keeps sleeping ... Benimi, a psychodiver who entered her dream to treat her, can no longer return to her reality. In order to rescue her Benimi, her peer Rin invades the girl's dream world. However, what awaited him was a perfectly managed chalky "city", a "parliament" that maintained the dream world, and "dongjin" who lived underground in the sun.