UPDATE!
We have updated the patch to fix the issue with the DLSite version.
Instructions:
1. Buy the game here:
https://www.dlsite.com/pro/dlaf/=/t/s/link/work/aid/SaikeyPtrn/id/VJ009471.html
2. Download the patch attached to this post.
3. Extract the zip file inside the root folder of the game.
4. Run the .exe file and enjoy!