Let's not get into the piracy discussion again, but let me add one thing.Technically speaking, at this time... Nobody can
The dev make his DRM more stronger than before, so we have to wait for the free release
Technically speaking there are multiple ways to get nsfw access for r13 right now.
1.) Ofc it's possible, technically speaking, to modify the game to get access to the nsfw part (without having legitimate access).
2.) If someone pays for access (i.e. personal code) and shares this access, this access is not really reversable. For future versions it could be revoked by dev. (Only way to revoke for current version is to force always online and that is 1. bad for legitimate customers and 2. still avoidable)
Practically speaking, it's unlikely to get a r13 code right now. Because 1. requires time and expertise and 2. requires money which is then practically "lost".