THE DEVIL'S SECRET (Akuma no Himitsu), by Hinako Takanaga. First published in 2007 and first published in North America in 2008.
PLOT:
Father Mauro is a priest in a small, rural village. One day while out on a walk he finds a strange, badly beaten young man in the bushes named Raoul. Raoul can't remember a thing, much less why he was injured in the first place or why he has horns on his head. He swears he can't be a devil, yet the more he molests Mauro the better he feels. When the truth is revealed, Mauro has to decide how much he values Raoul over his faith.
