Kim Hyung-min was born in Jinju, Korea, on December 29, 1978. In 2002 he entered the manga world, and in 2007 he debuted as an original storywriter with March Story, published in Sunday GX.
Yang kyung-il was born March 26, 1970. His debut work, Soma Shinhwa Jeongi, appeared in Weekly Shonen Champ in Korea. Notable works include Zombie Hunter (original story by Kazumasa Hirai) and Shin Angyo Onshi (Blade of the Phantom Master, original story by In Wan Youn). Yang also works on Defense Devil, currently serialized in Weekly Shonen Sunday.