The previously announced adult patch DLC for Renryuu was approved by Steam and became ready for the public release faster than I expected. Instead of having to wait two more weeks, it's already available!
This patch removes all censorship from images with adult content, and disables the automatic skip of sex scenes of the SFW release version.
You can continue to play the progress in your save files after applying the patch without problem. If you want to see scenes that you missed in your saves before applying the adult patch, you can go to the "CG room" in the menu to replay those scenes.