(Average) The Devil Is a Part-Timer!

Series in one sentence:
Evil, heartless, murderous demons instantly turn into funny, hospitable people.

Series in more sentences:
During an intense battle, Satan and his right-hand man are teleported to Earth and forced to live like normal human beings. But their arch-enemy is there too, keeping a close eye on them.

This could've been so good, but it lost its charm quickly. I don't like it when demons or monsters get introduced as threatening villains, but then turn meek when they're put in a different setting. Satan was disappointingly docile for a power-hungry lord.

This would've been a more interesting show if he responded to set-backs and normal social interactions with anger and violence, whereafter we'd slowly see him develop a sense of humanity, thanks to the people around him and the petty jobs he's forced to do in order to sustain his weak human body.
But he and every other demon that shows up are just.. normal guys. Far from a threat. I don't understand why Satan allowed for this one traitor to live with him, either, and the hinted at romance between him and the hero could've been left out. It was hardly a subject and went absolutely nowhere.

Most of the episodes were bland, I got very little entertainment out of this, wouldn't recommend.