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.
1972
2006
2016
—
2009
2023
2010
2007
2008
2012
2015
2013
2022
