The World God Only Knows has some very interesting aspects to it when it
comes to Keima's view of the world. While Elsie is eternally fascinated
by real world idols and the like, particularly the beautiful Kanon,
Keima couldn't care less about them as they'll never hold up over time
like virtual idols. As he says, they'll get older, skin will sag, retire
and so forth. Virtual idols will be forever young. And easily tossed in
the trash once they're no longer quite as interesting, but that doesn't
get covered. In Keima's world of virtual purity, the end of the real
wold idol existence is long overdue so that the true idols can flourish
in the virtual space.
So when said idol comes to the school, apparently a student there who has been away for some time, she's thrilled to be known and popular. Except that Keima doesn't recognize her in the slightest, which sets her off even more and makes Elsie realize that she's got a loose soul in her. While Elsie is all set to deal with this, Kanon is really racking up th ehits as we get a fun little montage showing her popularity and all the usual idol activities such as concerts, signings, sightings in the street and a whole lot of costume changes. As a snapshot of the usual tropes, it captures it all pretty nicely with a good bit of animation to it. The series has been really good with its animation and designs in general and this segment highlights how nice a job they do with things.
The loose soul angle of it comes in the form of Kanon trying to win over Keima and that's again a surprisingly small part of the show. Kanon doesn't go to extremes to win him over with how she wants to show him the value of being the idol she is, at least for quite awhile, Keima doesn't even seem to be aware of her for the most part. And Elsie is no help at all with all of it since she's just smitten with the idol concept itself. When it does go over the top, similar to the rich girl episode, it does keep to the usual ideas as Kanon goes big with it. The interplay between Kanon and Keima when they get rolling is definitely worth it though since he's so (un)intentionally oblivious to her that it only infuriates her more and makes her try even harder.