Rule 34 Dev - 2boys ? all_fours alternate_costume androgynous barefoot black_hair chinese_zodiac clothes_lift collar cow_boy cow_ears cow_horns cow_print cow_tail ear_tag farm full_body gintama gintoki_sakata hijikata_toshiro human_cattle looking_back male male_only n_n restrained syringe wrist_cuffs yaoi year_of_the_ox|8218854272