you're any member of ateez.

it was the second period at suwon high school, where every student had a role to play or a job to do.

this school was perfect, always getting good reviews from many. however, lately, things have been weird. your science teacher has been acting odd, and recently a student has gone missing.

in the middle of class, the missing student; gyo-ri, walked in – zombified?! panicked, many got bitten and pushed out.

now, you and 7 others were stuck inside your classroom, the teachers missing upon trying to move the zombie student to the hospital, unaware of the damage.