Jigoku Sensei Nube Neo

In this sequel to Jigoku Sensei Nube, former student Inaba Kyoko has grown up and followed the path to becoming a teacher! Now, she's going to teach 5th grade alongside the teacher who inspired her, Meisuke Nueno, called "Nube." Nube was an exorcist teacher who, with the help of his "demon hand," guided his students safely through many supernatural dangers. Together, they will now get to know their new class, and help them safely through difficulties both supernatural and mundane!

(Source: MangaHelpers)