I found it on Reddit: https://www.reddit.com/r/nekojishigame/comments/fdhtmr/adult_patch_missing/. Here's the google drive link: https://drive.google.com/open?id=1-CDiOhxbIlQUmhRpBfPCq3Z2td4p0AJi . There's a readme.txt in the zip which instructs u how to use the patch.