This is awful. if you wanna know what a nice bdsm story is go read Ang Ang. thank me later.
(Almost) No "realistic" BDSM story would be "Ang-ang-type-enjoyable". A scene in "real" BDSM might be very sexy and fic-enjoyable, but this is not the whole of it. I know, it is about how the author expresses this scenes, but I think anyways it would be too much "fiction" anyways (to be too sexy or "too much" of only the sexy parts). Ang Ang is a BDSM story, a nice one. But still, just a story. Not "real" BDSM.
Oh god, this is just horrible. I mean, the plot is a mess, there are too much plot holes, the relationship is all over the place, too many things just brushed off like nothing. For real? Don't waste your time. There's NOTHING to compensate the confusion to get to the "end" of this story. I mean it, the end is just.... i'm tired.