Chases students to kill them while cross-dressing. Extremely disgusting. Wearing stockings. Unpleasant. Gross. Carrying a metal baseball bat.

Scissors master. Skilled with scissors. Known as the ##-dong Slasher. 10th grade. Decided to sleep during night study, but now trying to defeat the crazed Department Head. Height: 175cm.

An insanely strong guy who has mastered boxing, jiu-jitsu, judo, and taekwondo. Stayed for night study and is now trying to defeat the crazed Department Head. Recently started kendo and capoeira. Height: 161cm.

Has a unique name. An ordinary student who stayed for night study and is now trying to defeat the crazed Department Head. Height: 171cm.

Han Jiwoo's twin. A delinquent. Good at fighting. Uses a lot of profanity. A delinquent but kind-hearted. Stayed for night study and is now trying to defeat the crazed Department Head. Height: 185cm.

An otaku. A model student who fights by hitting people with books. Trying to give the crazed Department Head a 'true education' during night study. Height: 176cm.

Loves music so much he has many instruments. Subduing enemies with sound. Currently subduing the Department Head. Height: 156cm.