For an anime, Jigoku Sensei Nube, this one would have been really good. For a live action, however, things didn't go as great as they should. The story was kind of odd, but cool at the same time. One thing that I really loved was the characters, actually, and, especially, the teachers. However, that demonic hand was not well presented. The action scenes were not good as well and the monsters, although kind of scary, there weren't that interesting. The romance, at least, and the friendship dynamics, as well as the teacher-students relationship, were all good. So, 5 out of 10.