One day Haruya Suketo is murdered whilst going about his daily life. However when he awakes he finds himself neither in Heaven nor Hell. He has been reincarnated into a fantasy world as Melicsto, the personal servant to the Devil King. But this Devil King doesn't seem scary at all; more like an over-excitable child. And what's with his servants? They're all weirdos too. What adventures will Melicsto get up to? Is there some kind of dark side to the Devil King, and how many people will Melicsto have to kill in his name?