Secret of the Demon Hand (Part 1)
The Demon Hand begins to break free from its seal on Nube's Day of Annihilation, the one day when his psychic powers are at their weakest. Without the seal, Nube's body and soul will fall completely under the demon's control. When Tamamo realizes the danger, he dives into Nube's memories to find a way to reseal the demon. However, nothing can prepare him for the shock he is about to face.
Aired 25/03/2026EP 12 - Secret of the Demon Hand (Part 1)

Hell Teacher: Jigoku Sensei Nube (2025) Part 2
Meisuke "Nube" Nueno, a teacher at Doumori Elementary School and expert in the occult, finds it increasingly difficult to protect his students against dark forces. After one of his students is sent to a parallel world, Nube encounters an unusual spirit that sends him back in time to change one regretful event.
Although Nube manages to fix the situation, this succession of unlikely events suggests that a more serious menace may be threatening the peace of Doumori. To protect everyone he holds dear, Nube will have to overcome the demons of his past and uncover the nature of the looming supernatural danger.
(Source: MAL Rewrite)