like the art and character design. Personal preference: I'd like to see a bit more hetero sex in the equation (if male on genderbent male is considered hetero or not, i don't know but that'd be good too). I feel like putting the MC in that kind of situation would add a lot of complexity to his mental state after being gender swapped.
It might be a limit of your method but the MC getting fucked by a much larger thicker cock sometime would be appreciated instead of the shorter and pointed stuff.