I'm looking for a story I read not long ago. In it, a box is delivered to a group of women, possibly in a sorority house, containing lots of bondage gear. The women, or one of the women, proceed to tie each other up. The main character of the story is in a particularly bad bondage situation and sneaks upstairs, luckily missing the group of guys that comes in and grabs all the girls downstairs, possibly the same guys that "accidentally" sent them the gear. Of course, in part two she isn't all that lucky...

Anyone have any idea what story I might be talking about, and where to find it?