Thats what i meant by sort out the licensing thing, even if he needs to swap to use something else, just redo the games, keep the story as is.
Cari has gone on record on his Discord that he doesn't like redoing/remaking stuff, so don't expect that kind of thing from him. Furthermore, he's already mentioned that he's planning to make the next game after Eternum with Honey Select 2 again, so he seems to be pretty much committed in not having his works ever grace Steam anytime soon.