This had the potential to be great, but they failed to bring a well paced story.
Story
The story was really interesting, Sai Akuto had a dream, and that dream was to be the Pope but little did he knew that he was destined to become the opposite of that, and that was to be the Demon King, every one in the Academy sees him as a treat and evil, when in reality he's not, he is a good person, who even wants to marry a woman and therefore he doesn't do anything with the girls that follows him, even when they try to seduce him, the problem with this, is that this was too short to rush the last episodes to be serious and throws you a lot of things that you didn't know and a lot of new factions and people, it was too much for just three or four episodes, it could have work with 24 episodes, but they failed with this, but that doesn't mean the story was bad, it was good, what i didn't get was if he hated god why did he wanted to become Pope, why don't just become the president of the country? if he wanted to help people or anything else related to help people and not something related with what he hates? and the ending was pointless seeing the last scene where he goes to see in which career he's good and following the story logic that can't happen but it did.
Art & Sound
The art was really good for being from 2010, sometimes was odd in some scenes but was good and the sound matched with the art style and the music background was good, the OP was great but the ED song was meh, the VA was fine.
Character
The characters were interesting at some point, but there's little back story for the majority of them they don't go nowhere, they don't have development but the characters are really good or at least Akuto was really interesting and this was because this just only had 12 episodes, they needed more to develop better the characters, Akuto was a badass, and i liked a lot Junko, she was my favorite girl.
Enjoyment
I really was enjoying it, but like i said i couldn't because everything felt too rushed and the ending logic was a little disappointing.
