世紀末オカルト学院
Four short spin-off episodes included in DVD/BD volumes.
Episode 1: よろしくツッチー (Yoroshiku Tsucchi) Vol. 2
Episode 2: なかよしツッチー (Nakayoshi Tsucchi) Vol. 3
Episode 3: がんばれツッチー (Gambare Tsucchi) Vol. 4
Episode 4: さよならツッチー (Sayonara Tsucchi) Vol. 5
