No otherwordly stuff, just real world.
The reason for this, I imagine is because it's a quick idea. See, before the Artifact, he made Incest Adventure, and after the Artifact, he started a crossover between the two, but due to reasons the project got scrapped. I would like to say it was because of the Patreon Purge to get rid of incest games and non-reluctant sex (including mind control), but I'm not a 100% sure. But since both featured a large component in this game, and both were hard to alter (since it was a sequel), no one expected it to return. But after a relative short time, this suddenly popped up. And while the story may be flimsy and unoriginal, it's still works and his renders have improved as well (also the choice to go Ren'Py instead of RPGM worked also in his favour). He has started a new game, though (which is why this is onhold, although he plans to return to this), which has time travel. I haven't played it yet since it's only in v0.2.