An anime television series adaptation produced by Atelier Pontdarc aired from July to September 2024.

The title of the series and its protagonist are a reference to Osamu Dazai, author of the novel No Longer Human, who died by lovers' suicide.

Sensei suddenly finds himself in another world, where an elf priestess named Annette says she summoned him to be a hero.

After inadvertently saving a catgirl he names Tama, he realizes that Sacchan might have arrived in this other world as well, and vows to reunite with her to complete their suicide pact.

'Shura Diary') performed by Kashitaro Ito [ja], while the ending theme song is "Sayonara, Subarashiki Sekai yo" (さよなら、素晴らしき世界よ, lit.