Some more ideas for potential AR stories/artwork/what-have-you:
* A "bizarro" version of those old "Milk: It Does a Body Good" commercials where a sexy adult woman wearing a bikini drinks milk while talking to the audience about wanting a smaller, less developed body.
Of course, as she takes a drink, she grows progressively younger, with her bikini *not* changing or shrinking along with her.
By the end of the commercial, the bikini's fallen completely off, but she's utterly pleased with her now-very young body (about 6 or 7).
* A pair of young women in their 30's are staying in an old chateau while vacationing in Europe, when one of them randomly comes down with flu-like symptoms after trying out an old bottle of perfume she found hidden in a dresser.
The woman recovers but starts to slowly but surely regress in physical age: the other woman is strangely okay with this and goes from finding the regression adorable and teasing her friend to becoming increasingly infatuated (even seductive) with the latter as she grows younger and younger.
As the woman is close to leaving her mid-teens (with the regression seemingly not going to stop), she finds herself essentially being groomed by her friend into a little sister or daughter-like figure (and a lover to boot - not that she seemingly minds as the regression might also be indirectly affecting her on a mental/emotional level).
* A schoolboy who's secretly a warlock-in-training becomes infatuated with a young and attractive teacher who he's convinced is also in love with him (she adores him like a little brother, but that's really it).
During Spring Break, the boy sees the teacher at a local pool, and is utterly enamored by seeing her in a revealing swimsuit: he decides then and there that he needs to make a move...with a little magic.
The boy first casts a spell that makes him and the teacher completely unseen/unheard by everyone else, then approaches her and says hello; the teacher (despite feeling a little odd that her student is seeing her in such a skimpy outfit) is happy to see him and asks him to join her in the water.
While they make small talk, the boy casts another spell on the teacher: the teacher finds that her brotherly adoration for the boy is becoming more intense...almost more romantic; while she continues speaking with the boy (and becoming increasingly tender and loving in tone to the former), she's also been growing younger and younger (again, with the swimsuit not changing or shrinking along with her).
By the time the teacher is the same age as her student, she's fully given into her younger body and mind's desires, making out with the boy (not knowing or caring that she was an adult - or that the boy's cloaking spell was starting to fizzle out).