The manga series Sayonara Zetsubou Sensei by Kōji Kumeta begins serialization in the magazine Weekly Shōnen Magazine.
The first season of the Sayonara Zetsubou Sensei anime adaptation premieres on Japanese television.
The second season of the Sayonara Zetsubou Sensei anime adaptation begins airing.
The original manga series concludes its serialization after several years.
An announcement is made about a live-action film adaptation of Sayonara Zetsubou Sensei.
Nozomu Itoshiki, a pessimistic teacher, begins his job at a new high school where he meets his eccentric students.
Nozomu holds his first class, introducing various students who embody extreme personalities and quirks.
Kafuka Fuura reveals her overly positive outlook, contrasting Nozomu's despair.
The perfectionist and strict girl Chiri Kitsu becomes a part of Nozomu's class, creating new dynamics.
The class organizes and participates in their school's cultural festival, highlighting their quirks and interactions.
In typical dark humor style, Nozomu tries to commit suicide but is repeatedly thwarted by his students or circumstances.
The violent and fanatical student council president Matoi Ritsu interacts with Nozomu and the class.
The school year ends with the class reflecting on their bizarre experiences and preparing for the next year.
