Simple desires here; Catboy getting bought as a sex slave, and training him into the new situation. Either as a pet person setup ("natural" or with the catboy being changed into such before being sold off, potentially as part of the new owner's specifications), or part of a fantasy/sci-fi race/species. (The owner could even be a cat person himself if going with a fantasy/sci-fi setting.)

I'm definitely open to expanding on this, but otherwise a very focused scene is great. Other possible kinks: heats/ruts, height difference kink, mild petplay which he would resist every step on the way (nothing fully dehumanizing, but keeping the catboy naked, leashes, caging maybe), bondage - we can talk about others if something appeals.

I'd be looking to play the catboy (an OC with a drawn PB). I don't have any preferences for the other character!