Allison's Fashion Passion Fiasco!

Allison, a cute blonde 19 year old with a passion for fashion. She's charmed so that she can only wear one layer over her skin at a time, with clothes disappearing and reappearing to compensate. If she tries to have more than one layer, whatever is covered will disappear and will reappear when it is the only layer. For example, she can almost never wear underwear, and if she's wearing a coat, she's bare beneath it, until she takes it off. However, if she wears a layer for too long, whatever is covered by it will not reappear. So, sleeping or snuggling under a blanket? She's bound to wake up naked underneath!

This enchantment results in a lot of embarrassment for poor Allison!

Where do we join her story?