Mmm, I love your frustration. There's no bigger a turn-on for me.
Now, there should be a nice, black satin plunge-bra. I know you don't have the breasts to fill it yet, but I'll fix that soon enough.
Now slave, you'll see there's also a nice under-bust corset for you, to help give you a nice, feminine figure, all black smooth satin. Put it on and I'll tighten it just a little bit for you. Eventually, it'll be fastened all the way, tight, but we need to train you to take it first.