Yes, it's the additional text patch that you have in mind - and it's available on Steam at this point, too.
Glad you don't mind the lack of CGs - we had to make some creative decisions with the patch and it just seemed like the better option for us back at the time (we explain that in more detail in one of the comments on the patch's page over here on itch if you're interested in checking it out). We hope you enjoy it for what it is!