You know, just like you did a bit in the artwork last time, but this time the lineart in the hands, right arm, and tunic bottom change just a bit for the 18+ shots. You can finish the original one now, but keep your WIP sets to save time coloring in the changed hands. For example, the left hand can be holding a spell card in the 18+ as magic cards to modify his dick into huge long dicks and can even morph them into animal versions like horse and elephant for example. He can even be holding his tunic bottom up with his right hand. Getting the idea now?