Well the story is Sadao, basically Satan, with his 2nd in command, Ashiya, go to Earth Tokyo, of course, after beating narrowly beaten in their homeworld by the hero and the forces of good, then tries to gain power there, though he is working as a part timer at a parodied McDonalds and trying to rise in the ranks there till eventual takeover of the world... omg I just realized how Invader Zim that sounds. Anyways, they are not alone as other members of their world comes to Earth as well including the hero, Emilia, who tries to figure out the reason as to why Sadao doesn't just evil it up in this world like he did before.
The design of the characters are pretty stellar to me, nothing about them really got on my nerves and even the background no name characters were honestly good to look at. A few of my favs are Ashiya, James er I mean Sarue, and Suzuno. As for how the characters are, just get in there, watch the anime, see if your personality allows you to like them like mine does.
Sound and enjoyment are pretty top since I never skipped either op or ed and the ost is something I need to hear more of on youtube.
On a side note, that seal punch Sadao did on Lucifer was just amazing in execution.
