Rule 34 Dev - 2boys back_muscles black_hair blush bottomless chinese_zodiac cow_boy cow_ears cow_print dutch_angle gay gintama gintoki_sakata hijikata_toshiro implied_sex kemonomimi lactation male male_lactation male_only milk mozhi muscular muscular_male neck_ribbon official_alternate_costume outercourse outside pale-skinned_male pale_skin shirt_in_mouth shirt_lift sitting_on_lap sitting_on_person sweat tiger_boy tiger_ears tiger_tail topless_male twink white_hair yaoi year_of_the_ox year_of_the_tiger|7284201592