If you're looking for manga similar to Nora, you might like these titles. All recommendations are made by Anime-Planet users like you!
Both of these series are action/comedy shonen series about a young and powerful male character from a hidden society (in Anagle Mole, it's aan undergrowd civilization, and in Nora it's Hell) who ends up in the human world. Although the circumstances are different both characters must eventually fight different super-powered members of their own race and befriend humans. Although Anagle Mole is a bit heavier on the comedy, I think if you liked one, you'd enjoy the other.