A text message arrives from a dead friend. Since then, mysterious cases take place in a high school, which are intricately tangled with each other. Five mystery club members get together to reveal the truth of the mysterious incident at school.
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Episode: 1 Five Transfer Students Arrive At Saera Girls’ High School
Episode: 2 Five Transfer Students Go To The Mystery Club
Episode: 3 The Mystery Club Hideout
Episode: 4 The Curious Case Of The Cafeteria
Episode: 5 The Question Number Five
Episode: 6 The Secret Of Mr. Dokgo
Episode: 7 Suicide At The School
Episode: 8 Hee Sun And The Green Pills
Episode: 9 In Hye’s New Posts
Episode: 10 The Past Of In Hye And Ae Ri
Episode: 11 In Hye And Ae Ri’s Friendship
Episode: 12 The Suspicious Teacher
Episode: 13 It’s Mr. Dokgo
Episode: 14 Rooms with Numbers
Episode: 15 The Enrichment Study Building
Episode: 16 Series Of Switches And Jolli-G
