The idea of devils sending sinners to hell was really interesting, and the MC was really smart in trying to turn the list of potential/future sinners around by trying to prevent them from sinning in the first place. Also one of the devils was scared of girls but since he had to kiss to send them to hell, he was losing in the race to get rid of the most sinners. Very creative and very handsome and cute characters with funny personalities.
Jigoku No Enra