Two possible ideas here.
One, I'm backpacking or working my way across America or Europe. I walk by a bdsm/fetish store, and the owner talks me into trying on one of their catsuits, hoods, collars, armbinders, ballet boots and gags, then refuses to release me from them, keeping me as their new slavegirl and model there.
Two, I'm working at a bar and are invited by a co-worker to a special club., one where people into the bdsm/fetish lifestyle frequent. Someone there talks me into trying on all of the above, and ends up keeping me.
If either idea sounds good to anyone, let me know.