01. 우리 반에 귀신이 있어 (There's a Ghost in Our Class)
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.
02. 누가 귀신일까요? (Who Could Be the Ghost?)
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.
03. 귀신이 우리반에 미치는 영향 (The Ghost's Insidious Influence on Our Class)
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.
04. 귀신이 척 하면... 귀신한테 혼나. (If You Pretend to be the Ghost ... The Ghost Itself Will Punish You.)
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.
05. 진짜로 귀신들린 교실 (The Classroom That Is Truly Haunted)
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.
06. 꼭꼭 숨어라 귀신 정체 들킬라 (Hide Well, The Ghost's Identity Will Be Discovered)
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.
07. 이제 우리반에 귀신은 없다 (There's No Ghost In Our Class Anymore)
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.
08. 귀신과 친구가 될 수 있을까? (Can We Be Friends With the Ghost?)
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.