Kyou kara Maou!

Yuri Shibuya tries to defend a classmate from bullies and ends up with his head pushed into a toilet. The water transports him to another world, where his appearance marks him as the next king of the demons.

Ruling is difficult enough without customs that turn innocent gestures into binding commitments. Surrounded by powerful retainers and tensions between humans and demons, Yuri tries to govern according to his own sense of fairness rather than accept the hostility everyone else considers inevitable.