The premise of an apocalyptic erotic game is okay, but I have a suggestion, instead of a furry female anthropomorphic fox person, she should be a human girl instead
But there should also involve nudity and exhibitionism when the nanobots in the atmosphere begins to shred the girl's clothes off leaving her naked and there is no piece of clothing, she will have no choice but to remain naked to survive which is why throughout the game she should remain naked.
And there should also be transformation theme, because whenever she ends up to some containment area, she would transform into a different species including the fox anthropomorphic one and the more she transforms, the more she will lose her humanity and become feral unless she finds an area or cure to turn her back into a human.
Will you use them for your game?