Jo is studying alone in class, however she doesn't yet realise that earlier today Mercedes covered all her uniform & lingerie, including her socks, in slow acting itching power! As she sits at her desk she starts to feel its effects, using a pen to scratch her back under her shirt, but it is about to get worse. She feels itchier & itchier so in her frustration, and feeling more uncomfortable, she starts to slip off her uniform, it is the only way she can think to suppress the terrible itch. Off comes her top, tie, shirt & shorts, but she is still very itchy. So she slips off her bra, but she is still so uncomfortable. Off come her shoes & socks but she is still scratching away at her soft skin, it is no good; the panties have to come off too! Finally, completely naked, she can feel some relief at last!