Oh I have an idea suggestion that may go well with this. Since he wants to play as a human and we want to go with a similar theme what if we have a game centered on keeping power? Sort of like a dark lords theme where you go around stopping rebellions and carefully threading the line between taking what you want and not upsetting the nobles that are your keys to power. You can even expand it to include netori content or some other fetish I don't know just spit balling.