The manga i've been reading lately is Defense Devil (can be found at Mangareader.net) there's about 100 chapters i'm on 45 right now and so far it's really good. The main character Kucabara, a kind lawyer for people who have died and are sent to hell, finds evidence that proves that they should't go to hell and takes the dark matter from them that makes them sinners. The dark matter that he collects will determine if he can go back to the demon world or not. I would definitely recommend reading this.