He is hanging by the neck in one of his many suicide attempts. She, being endlessly optimistic, thinks he is simply trying to make himself taller. Needless to say, this is where things get quite strange...and hilarious.
He teaches a class full of strangers, from the hikikomori, to a Disassociative Personality Disorder suffering transfer student, to a stalker, to a ridiculously OCD psychopath. And a normal girl.
The series does not take itself seriously at all, and is probably the darkest, strangest, and most disturbing comedies in existence.
AND I LOVE IT.