Neither are. Well, at least not entierely. Khemia is a "half-sequel" in which you don't play the human, but another wolf. It's half sequel and half spin-off, while Interea is a spin-off only.
So we don't get to see more of the human and Amicus? Khemia and Interea are just what happens after Amicus goes back to adastra after leaving the human back in Rome?
Interea happens before Marco (the human) goes back to earth, this is the tour on the moon that Amicus mentioned. While Khemia happens 2 years after Marco has been dropped on earth and you play as Scipio, a scholar wolf.
