I don't think this is the right way to collaborate.
Viewing post in Lustful Sin v0.6.9 update! comments
So two VN games are "collaborating" by swapping character models to create sex scenes while claiming it has nothing to do with the original works? Who in their right mind would jump from one fandom to another for this digital whoring? This isn't cross-promotion - it's cringe-promotion. What even is this? Cyber pimping with extra steps?