Demon x his door to the human realm and demon realm
So many side characters, so many side couples, absolutely scrumptious
Erotic painter x master of the house
Twink royal (?) x buff servant
So the twink is supposed to get married to the servant's master, so the servant is trying to teach him the correct ways of sex, how to please, what to do, etc, before they meet. The twink top starts to catch feelings for the servant, and it goes from there
Aliens x human
Would you like to get fucked by an alien? How about three that are the same person? How about four? Why are there so many of the same alien??
Esper x guide
Both of the espers that want the guide are brothers. I'm not sure what happens
Actor x normal person
They get together because of a misunderstanding
Demon x human
Porn star x "I need money"
Cake x fork
Dear Door