There's an excellent sequence near the start of "Brand New U" #2 - part of which is above - showing a flat-chested girl with a sensible haircut becoming a huge-breasted feral amazon. Very cool.
Check out this free sample of Brand New U., a comic from the BE Story Club. The premise of the story relies on a clinic called "New-U Cosmetics", which has the technological means to transform women into any form they desire. The protagonist seeks to become tall and chesty like her sister, and while she's promised the results are possible, of course there's a catch.
The art is very good and the story is interesting, suspenseful and very stimulating. (That's a transformation sequence, above.)