1. Download both files, and put them in a seperate folder. It should look like this: 

2. Click on the executable. You may get a smart screen warning. Click on more info than run anyway.

If it does not show the following screen, stop:

If it tries to open it in 7zip or WinRAR - right click on the file, and make sure it runs instead of  opening in an archive.

3. Click on extract.

4. You will see a folder labeled vol4_steamR18DLC. Click this and you will see this folder:

5. Click on 'nekopara_vol4_Steam_R18DLC.exe'. If you not have yet installed NekoPara Vol 4 from Steam, you may get this warning:

6. Make sure to read the readme when installing.

7. Follow the prompts to install.

If this doesn't work, please contact us and inform us you've followed this guide.