Rule 34 Dev - anthro anthrofied anus biped black_hair bowed_string_instrument butt cello clothing cutie_mark female footwear fur genitals grey_body grey_fur hair legwear long_hair looking_at_viewer looking_back musical_instrument purple_eyes pussy rear_view smile socks solo stage string_instrument sajik slowtolearn friendship_is_magic hasbro my_little_pony octavia_(mlp) earth_pony equid equine horse mammal pony 2014 2d_animation 9:16 animated motion_tweening short_playtime|2486475215