The &quot;juvenile delinquent&quot; of the class, Katsuya Kimura (Kimura Katsuya 木村克也) acts much worse than he really is towards Nūbē and his other classmates. At the start of the series, Katsuya is consistently portrayed as a loner, either due to being misunderstood by his classmates, his own cowardice or from his delinquent behaviors such as smoking or stealing charity for a good cause. But as the series goes on, he slowly comes to grips with himself and joins in with Nūbē and his friends where he is one of the main members of the class. Katsuya is a huge pervert towards sexy females, an attribute that gets him into a huge idolation of Miki. (though she sees treats him like her dog) He also finds himself consistently with the worst grades in class alongside both Hiroshi and Makoto. But while he is a coward and a bad seed, he is amazingly also a loving, caring and protective big brother towards his little sister, Manami.    Source - Wikipedia

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)

Kumiko Ijima who is one of Nube's students recognizes that a man in a local park is really a criminal wanted for murder when she remembers drawing his face from the wanted photos posted by the police. Kumiko warns her classmate Kyoko while at the same time the man discovers the drawing with the name initials "K.I." written on Kumiko's drawing portfolio and briefly sees that Kumiko wears a red ribbon in her hair. The cops chase the criminal who crashes his car into a seal where a demon takes control over his soul. The demon is now on a killing rampage to find any girl that wears a red ribbon whose name initials are "K.I.".
 
(Source: Anime News Network)

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)

A new anime project for Jigoku Sensei Nube.
 
The story follows Meisuke Nueno, aka "Nube," a psychic teacher with a demon hand, as he battles evil spirits and monsters to protect his students in this saga that employs elements of Japanese mythology and folklore to tell a fan-pleasing action story.
 
Known for its occult and horror elements on school ghost stories and urban legends, Nube captivated readers across generations with his heroic efforts to save his students from supernatural threats.

The second cour of Jigoku Sensei Nube (2025).

In order to save the 5th year students taken into the world of ghost stories, Nube sensei has to travel beyond time and space to bring his students back

The legendary horror manga returns with treasured stories to add to the collection! This spin-off series follows Nube, Hiroshi, Kyoko, and the others as they experience untold stories in Domori. A short serialization to celebrate the new anime adaptation!
 
(Source: MANGA Plus)