Hell Teacher: Jigoku Sensei Nube.

A number of inexplicable phenomena have been plaguing the town of Domori. In order to protect the town's children, a new homeroom teacher known as “Nube” arrives. Normally gentle and a bit outgoing, Nube has a secret side: he is, in fact, the only psychic teacher in Japan. Rumor also has it his left hand is possessed by a demon! Hell's messenger of justice is here to take on the school's seven mysteries, ghosts, and evil spirits attacking his students.