Goku Sayonara Zetsubou Sensei is a oVA anime that premiered in fall 2008, produced by Shaft.

About the production: the story comes from a manga, there are 3 episodes of about 25 minutes and its current status is "finished".

Its main genres are comedy, with themes such as Satire, Surreal Comedy, Primarily Female Cast and Male Protagonist.

On AniList, Goku Sayonara Zetsubou Sensei has an average score of 76%, a very good score, and appears on 16,649 users' lists.

The franchise continues in or follows from: Zoku Sayonara Zetsubou Sensei and Zan Sayonara Zetsubou Sensei.

A continuation of Zoku Sayonara Zetsubou Sensei, with more stories revolving around Nozomu Itoshiki, the extremely pessimistic or despairing teacher, and the students of class the 2-H, who are each hilariously abnormal in their own unique way except for the one relatively normal girl who hates being called normal. (Source: Anime News Network)

Official synopsis from AniList.