overview : 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.

First Air Date : Mar 14, 2016

Last Air Date : Apr 05, 2016

Runtime : 16m

Episodes : 19

Seasons : 1

Genre : Mystery,Drama,

Companies :

Countries : KR

Keywords : time travel, investigation, supernatural, high school, teacher, school, spirit, mysterious, school bullying