Goku Sayonara Zetsubou Sensei

Nozomu Itoshiki, the pessimistic high school teacher at the center of Sayonara, Zetsubou-Sensei, tries to hang himself at the very start of the show. He is saved by a youngster named Kafuka Fuura who is incredibly upbeat (though in her effort to save his life, she almost kills him). She tells him that it is absolutely inconceivable that he would hang himself on such a pleasant day, particularly in front of such lovely trees. She chooses to call Nozomu "Pink Supervisor" and makes a payment offer of 50 yen in exchange for the moniker. Nozomu has had it with the odd Kafuka, so he runs to the school and begins his homeroom class. However, his attempt to flee is in futile since he discovers that she is one of his pupils. In addition, Kafuka is simply the tip of the iceberg because every kid in his class has a unique personality trait or strange passion that presents hurdles for him to overcome against himself.