Rule 34 Dev - 4_fingers anthro arm_support barefoot big_penis biped breath breathing erection feet fingers fur genitals grey_background half-closed_eyes head_tuft holding_penis long_tail looking_at_genitalia looking_at_penis looking_down male mane masturbation narrowed_eyes nude on_ground open_mouth panting penile penile_masturbation penis side_view simple_background sitting solo tail throbbing tuft twitching roy_arashi roy_(chuki) chuki mammal rodent 2019 2d_animation animated black_and_grey digital_drawing_(artwork) digital_media_(artwork) frame_by_frame hi_res line_art monochrome short_playtime sketch unfinished|9696318555