1x25 - Hell Teacher: Jigoku Sensei Nube

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.