This guide provides methods to R18 Patch of Rebirth2:Beware of Mr.Wang, there are multiple way to get it, and the method of install are explained below as well.
How to instal
So use a browser and look on this page:https://steamdb.info/app/1761550/
In the upper right, you find an “Install”-button.
If you push that, the page tries to install this DLC – maybe you will be asked, which program you want to use (Answer ist Seam, of course).
After that, the patch should be shown in the DLC-Sector of the game in your library.