When the clock strikes midnight, we're trapped in After School. In that world, there's no right answer, no end, no game clear. There's only our lifeless bodies, stacking up one by one.
One day, Kei Nimori, a young elementary school student, suddenly notices his name scrawled on the classroom blackboard, alongside the mysterious words “After-School Duty”.
Thus begins a dark, midnight fairy tale of several young boys and girls risking their lives to record and contain monsters in a bizarre realm known as “After-School”.