In the past, succubi were portrayed as being quite ugly and evil. Nowadays, succubi are portrayed as being quite beautiful and often sweet. So how did succubi get here?
The Devil is a Part-Timer Episode 1 Review-The Devil Arrives in Sasazuka
It is nice to see the evil villain protagonist who wants to rule the world is actually a nice and friendly guy who cares about others, as this sets up for many hilarious engagements when you have a villain protagonist who also has a soft side.