I can't say about this chapter (haven't completed it yet), but have you played the first chapter (Dollhouse District) of the series? There was some of this. The whole plot was about coprporation which was abducting girls from town, then placing them in deep trance and transforming them into mindless androids (aka dolls) used for sexual pleasure. There were scenes with injections to transform their skin in plastic, branding them with barcodes and changing their limbs to robotic one's. I won't say that game had much erotic content tho, a lot of boring quests and useless time spending, but some of the scenes I personally enjoyed.
After completing the game I thought that maybe I can find simmilar stuff in developers Pixiv comics, but unfortunately no. There were no transformation scenes itself, just hypnosis and then warping the story to the point where they already became androids. So I bet this game has the same issue probably.