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