Yui Kamio kind of reminds me of Hungry Marie, which was another series done by a returning veteran that involved supernatural and romantic elements (and even body switching to boot!) and both seemed extremely confused about what the actual subject was. I think Yui Kamio is actually better than Hungry Marie, because Marie was constantly introducing new lore, changing up the elements of the story structure, setting and subject, Yui Kamio at least has a stable base of Kito dealing with the chaos that comes with looking after Yui. It does go in a lot of different directions, and new characters come and go all the time, but the core element of the story is basically the same.