Surprise! All the members of the Occult Research Club are devils, including new-recruit Issei, who's having difficulties figuring out the whole "demonic power" thing. Maybe he'd have better luck if Fallen Angels stopped popping up and trying to kill him.
Casts:
Yuki Kaji, Yoko Hikasa, Azumi Asakura, Shizuka Itoh, Ayana Taketatsu, Fumihiko Tachiki, Saori Seto, Risa Taneda