It's hard to say whether there's any process in this one. One page at least hints at it, but you'll have to judge for yourself whether it's actually there. The results are certainly nice, though. The fact that she bursts out of her bikini after expanding is great as well.
It was difficult to know where to put this thread. It may look somewhat like AP, but it's actually not AP since Akira's original female form is fully grown and there doesn't appear to be any aging going on with this other transformation. Therefore, I determined that this belongs in the BE forum. But if one of you moderators thinks it actually belongs in the AR/AP forum, feel free to move it there.
For those of you who don't know what's going on with this manga, it's about a guy named Akira who can transform into a girl by simply sneezing (and transform back into a guy the same way). He acquired this ability after some weird accident with an arcade machine. The girl he transforms into is a perfect copy of a video game character in the arcade game he was playing when the accident happened. His female form is very petite (about 4'11" if I remember correctly) and cute. Much later, he discovers that eating something called nattou while in his female form causes him to undergo another transformation into a voluptuous and ultra-sexy (not to mention much taller) version of his original female form.
He's done this "nattou transformation" twice before. Check out chapters 24 and 25 for the first one and chapter 30 for the second one. You can find links to these chapters on
Taruby's website.
This latest hourglass expansion comes from chapter 42. I can't read Japanese, but it looks from the images as though Akira's friend is getting really embarrassed in what appears to be a bikini competition and so Akira decides to enter the competition in his/her expanded form in order to take some of the heat off her. I might be completely wrong about that, though.