I'm afraid it's probably not very feasible, just because the volume of work required would be really considerable and it may impact all kinds of other aspects of the game's appearance -- character positioning, text display and so on would be very poor without really heavy modifications, more than we can really afford to commit at this time. The conditions of making this game were a bit unique in that way!
I'm sorry for the inconvenience! It may seem like it would be distracting, but while we're a short game, we have a large body of text, written almost in novella format. It's like having a page next to the illustration.
The game does have CGs! There are five or so CGs that occur regardless of branches, and each story branch has 3 unique CGs each. The PG-13 scenes and the R scenes are roughly the same, though the PG-13 CGs are edited into a more tasteful form, with less suggestive imagery. :)