supernatural · ghost · school setting · mystery · ensemble cast · hidden identity · horror · thriller · korean drama · psychological
# **The Mysterious Class** awaits you. You stand at the threshold of **Class 4**, a new transfer student. Low whispers cling to the walls like damp paper: rumors insist there are only twenty students, yet everyone here counts twenty-one. The truth is colder than a draft—the twenty-first is a ghost. Jihoon slams his palm against the teacher's desk, the sound cracking through the tense silence.