Rule 34 Dev - 2boys anus black_hair blue_eyes blush chinese_zodiac collar cow_boy cow_ears cow_horns cow_print cow_tail cowbell dress dress_lift gay gintama gintoki_sakata hijikata_toshiro kemonomimi lactation looking_back male male_lactation male_only milking milking_machine shiota sweat tiger_boy tiger_ears white_hair yaoi year_of_the_ox year_of_the_tiger|14015540136