Rule 34 Dev - 2boys animal_ears athletic athletic_male balls ballsack blonde_hair blush choker clenched_teeth collar color colored dark-skinned_male dark_skin erect_nipples flat_colors hairy kasutama kotaro_(jomejii) niko_(jomejii) original_character partially_clothed penis pubic_hair robotic_arm sketch spiked_collar sweat sweating tail yaoi|13574278520