Demon Diary (originally Diary of a Demon King) is a 7 volume manhwa (Korean comic) illustrated by Kara Lim (who usually just goes by the pen name "Kara"). It was originally published by Sigongsa and has been licensed in North America by TokyoPop.

Demon Diary has had a number of authors who worked with Kara. The story for volume 1 was written by Lee Chi Hyong . The stories for volumes 2 through 7 were written by Lee Yun Hee and Jee-Hyung Lee .

Story

Demon Diary is a BL/shōnen-ai story about Raenef, a newly appointed Demon Lord, and Eclipse, his tutor and instructor. Raenef is lazy, slow, humble, and easy mannered, the very antithesis of a proper Demon Lord.

Bonus stories

Volume 1 of Demon Diary includes two bonus stories illustrated by Kara and written by Soome Lee : "Crystal Heart" and "Terra".