While I've never heard of EpicLust I assume it's this
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If so I'd pretty much say it screams Daz for characters and wouldn't be surprised if everything else too. Just assuming however probably bought from some store or just pirated...
There are 3 major ways 3D assets are made ...
1. One makes them in Blender, Maya, 3dsmax, Zbrush, and other software like that or Daz, Character creator 3(I don't know of any case where it's used for VN style, however, might be) for characters
2. Purchase them off a store or if lucky get them for free from there too can occasionally happen and use them within whatever program
3. Pay someone to make them for you
4. not being so legit rip them out of a game using whatever methods or just pirate them I mean it is a pirate forum so screw it.