No panties today, Nikolaus. Remember how you dared me? Short skirts and no underwear, would I dare do it? This is the third or fourth day running I've travelled to work without my knickers on; they're scrunched up inside my handbag, a wisp of modest I've brought with me just in case I lose my nerve. We both know that I won't.   Nikolaus only knows her from the name badge she wears on her jacket--Cassie. But he wants her more than anything. Cassie sees him every morning on the train. The affair that develops takes place entirely in their minds. Will they become lovers in the real world or will they part as strangers?