The dev updated his test patch and added something that, personally, I've been waiting since FOREVER.
You can now toggle an option to see character's faces while doing stuff like doggytyle!!!
View attachment 4583550
Patch note:
NEW - Added face wipe function for rear-side play
- Added a large number of customizable character parts
- Added the ability to switch to contour-enhancing textures.
- Added the ability to customize characters just before starting a new game.
(*Clear data is required).
Hopefully someone can share it with us!