Review for first two chapters (Akuma ga Hallelujah story):
In the start I like it, really. Characters weren't anything new - perverted male student who just plays with heroine's heart but in the same time, he protects her. And naive female girl, confused and annoyed by him.
OK, for twoshot it is good enough.

Art was good. Probably the best thing on it.

And story... well, I didn't expect anything original. But... Young perverted and rude... priest? Mangaka probably knows nothing about Catholicism. But OK, Rosette in Chrno Crusade also wasn't a pattern nun.

The problem inheres in the end of the story. It seems like the author was already tired with that so (s)he said: "Fine, I have enough! It's the end and goodbye!" and cutted it - all of a sudden. There's any climax, any finale, any conclusion.