FURVERT!

4:3 anthro armpit_hair blue_eyes body_hair bound butt canid canine canis chain cuffed_wrists duo ears_down eye_contact fangs fur genitals gradient_hair grey_body grey_fur hair hi_res knot knotted_penis larger_sub leash leash_pull legs_up looking_at_another lying male male/male mammal muscular muscular_male naevus nipples on_back pawpads pecs penis pivoted_ears purple_body purple_fur shiryu_(shiryu080)simple_background size_difference smile smirking_at_partner submissive submissive_male tail teeth wolf yellow_eyes