Nube is a clumsy, easygoing, and very kind teacher, but he has a secret under his glove on the left hand. He has a monster hand, and he also has the ability to sense ghosts and evil spirits. So he protects his dear students from these evil spirits with his monster hand, proving to be very powerful.
 
(Source: Anime News Network)

Maruta Mari's parents both work in theatre: her father is a stage designer and her mother is an actress. Mari has been interested in paintings and manga since early childhood. She studied at a junior college of art, where she was also a member of the local manga research club.

Apart from voice acting work, Mari is active as a jazz singer and is currently a member of the unit Wild Strawberry together with Inoue Kikuko, who is also a seiyuu, and the pianist Ogasawara Junko. In June 2013, she married a person she's been dating for 10 years.

The series follows Meisuke Nueno, better known as Nube, an exorcist who also happens to be the teacher for a 5th grade class at Doumori Elementary. While he uses many various exorcism techniques, his main weapon is the Demon Hand which is the power of a chaotic oni sealed right where his left hand should be. The series follows Nube and Doumori class 5-3 though the many weird, chaotic, and downright silly and insane encounters they face with the many forms and elements of the supernatural.
 (Source: Wikipedia) 
Included one-shots: 
Volume 1: Jigoku Sensei Nubo (2nd pilot) 
Volume 2: Jigoku Sensei Nubo (1st pilot)

Mamoru Kazama