A homeroom teacher of Yosan Private High School has an accident, and thus a substitute comes to fill in. Han Bong-Gu is a mysterious man, and after strange occurrences the class president Ye-Rim tries to get to the bottom of this mystery.
as Han Bong-goo
as Kang Ye-rim
as Seo Sang-woo
as Kim Seul-gi
as Oh Ki-chul
as Do Do-hee
as Cheon Jae-su
as Ahn Si-yeon
as Lee Jong-seok
as Ko Ki-tae
as Kang Sang-tae
as Park-byul
as Sang-mi
