I.O.I's Mysterious City·Naver TV
All episodes
1 season · 11 eps
Season 1
Women's dormitory bathroom Episode 2
Abandoned building (1) Episode 3
Abandoned building (2) Episode 4
Haunted village (1) Episode 5
Haunted village (2) Episode 6
Abandoned school Episode 7
Abandoned amusement park (1) Episode 8
Abandoned amusement park (2) Episode 9
Abandoned ship Episode 10
Last back story Episode 11
11 episodes in Season 1
Some details come from TheTVDB.