Sayonara, Zetsubou-Sensei Vol. 6 (Kodansha, 2013)

Those suffering from this peculiar condition, according to Zetsubou-sensei, blame themselves for everything that goes on around them. But as Zetsubou-sensei explores this affliction, he realizes that he himself is a victim! Luckily, the sensei has a foolproof plan for putting an end to Delusional Self-blaming Disorder which happens to involve a long rope dangling from a tree. Could this be the end of Zetsubou-sensei?