FURVERT!

5_fingers against_surface against_wall anal anal_penetration animal_genitalia animal_penis anthro anthro_on_anthro backsack balls blue_eyes blue_hair blue_markings bodily_fluids bound brick brick_wall brown_body brown_fur butt canid canine canine_genitalia canine_penis canis clenched_teeth close-up clothing cum cum_in_ass cum_inside cum_on_balls cum_on_ground cum_while_penetrated cumshot curatrix dark_room domestic_dog duo ejaculation erection facial_markings fingers fur genital_fluids genitals german_shepherd green_eyes grey_body grey_fur hair head_markings herding_dog hi_res knot looking_pleasured male male/male mammal markings matt_wolf medieval neck_grab night open_mouth pastoral_dog penetration penis prison prison_cell prisoner rough_sex sex shadow standing tail teeth torn_clothing vallhound wall_(structure)window wolf