When you acquire an unlabeled plant, it is really difficult to nail it down with certainty. When I put this on the Plant ID forum some time ago and did my Google search for images as best I could, I ended up being satisfied that it was Kalanchoe. That was as far as I got. My personal data entry reads "Kalanchoe - maybe thyrsiflora, luciae or tetraphylla – maybe aka 'Flapjack Plant" and that's where I left it. If it truly blooms successfully, perhaps that can be narrowed down? Maybe?