Rule 34 Dev - 2020 abs anthro biceps brown_body brown_fur clothing collar dog_tags erection fist flexing_both_biceps fur geometric_background harness human human_to_anthro jockstrap kangaroo long_tail macropod male mammal marsupial mid_transformation muscular muscular_anthro muscular_male open_mouth pecs simple_background solo species_transformation tail thestory transformation underwear|10271668544