Goku Sayonara Zetsubou Sensei

Tatsuhiro Sato is a university dropout and a "hikikomori" – a person suffering from social withdrawal. To Sato’s dismay, his self-imposed exile from the world is rudely interrupted when a mysterious girl knocks on his door. She has charged herself with the task of curing Sato of his hikikimori ways! Now, as new problems ranging from hentai games to internet suicide spring up, can Sato manage to overcome his hermit-like ways, or will the imaginary N.H.K conspiracy force him to remain a hikikomori forever?

Now in their third year of school, Nagasumi continues to evade death at the hands of San and Luna's over-protective fathers and their merfolk mafia. Everyone hopes to get placed in the same class again this year, but Nagasumi is instead placed into a class full of oddball delinquents and a teacher named Shark – a teacher who then orders everyone to kill each other! While Nagasumi fights for his life in school, on the weekends he gets to date San and take her out to movies and maid cafes. With danger always around the corner in Nagasumi’s presence, he’s constantly rushing to everyone’s rescue, leaving a very worried San in return. Will Nagasumi manage to escape this semester unscathed?