A good cartoonist would make a background of some sort, maybe with side characters doing cameos etc...
Hell, if it's that cafe that Stephie went with her mother during the "cum cup" arc, and also the same one where Ciel got goat milk lattes, then Sophie could have drawn one background bigger than a a single comic square, as a vector, shifted it left right depending on the angle for easy variations and zoom in/out, and used this as a kind of "the neighbourhood's cafe" location, which would add depth and lore.
It could be owned by Linda, a kind 57 years old transwoman, who dotes on the genderspecial kids and pokes phobic bullies with her stick... Err her broomstick, yes.
Among her regulars are Captain Corndog. Every Friday the 13 on evenings she holds an event called Ouija Day, where they summon Granpa Faggot to annoy him.