A nice idea. Not sure posting the plot summary right at the start was so great; usually better to let the readers work these things out for themselves, but still, not bad. Interesting characters; I quite like Vula; she's got a mission but she's not necessarily nice; she's happy to manipulate the slig. Drog might be a bit of a cliche so I'd make sure to give him a past and a personality beyond wimpy-nice. Why is he nicer than other sligs?
I'd also suggest lengthening the time it takes Vula to realise that this guy is not your average slig; it seems to abrupt for her to realise he's not just shy butis actually distainful of native life.
Still it was good and I might follow this
But I'd use a larger text size for the chapters, the normal size would be fine. Reading so much tiny text makes for tired eyes!