2021 • 8 Episodes
November 12, 2021
In a late-night seance, the students of Grade 12 - Class 4 in Boseok Boys' High School discover the possibility of a ghost haunting their classroom. Their homeroom teacher coincidentally falls unconscious in the stairwell.
November 19, 2021
Ye-dam's music demo gets tampered with an eerie paranormal noise. Hyun-suk carries out his ghost-hunting tactics and notices something weird about Asahi.
November 26, 2021
Asahi disproves his classmates' suspicions about him. Jung-hwan films a ghost-hunting vlog inside their classroom, much to Do-young's anxiety. Jae-hyuk obtains an anti-ghost talisman, its magic unexpectedly working against Haruto.
December 3, 2021
Desperate to satisfy his online followers, Jung-hwan resorts to secretly fabricating fake paranormal events and filming his classmates' reactions to them. Jae-hyuk unexpectedly discovers the ghost's identity.
December 10, 2021
Yoshinori discovers Haruto's identity through tarot card reading. At the spring festival, Class 4 fails to scare their customers in their haunted house booth. Haruto decides to step in, but things quickly turn awry.
December 17, 2021
Jeong-woo is hospitalized after the school-wide paranormal event at the spring festival. Class 4 finds itself pointing fingers at each other. Do-young discovers the ghost's identity and Haruto is forced to explain himself.
December 24, 2021
Haruto reveals his sad tale to the students of Class 4. Do-young becomes resentful of Haruto after failing to obtain Mr. Ha's recommendation letter. In shock, Mr. Ha finally realizes Haruto's identity.
December 31, 2021
After confronting Haruto in fit of rage, Mr. Ha threatens to impose penalties on anyone who interacts with the ghost. Yoshinori's grandmother holds a classroom exorcism, putting Class 4's sympathy for Haruto to the test.