Kanzen Hozonban!! Jigoku Sensei Nube Chou Hyakka

完全かんぜん保存ほぞん版ばん!! 地獄じごく先生せんせいぬ〜べ〜超ちょー百科ひゃっか

A collection/recap of all the episodes (an encyclopedia of demons, spirits, the story of the Oni no te, the romances, etc.)