Rule 34 Dev - 1girl alternate_costume animal_ears breasts brown_eyes brown_hair closed_mouth collarbone detached_sleeves hair_between_eyes hair_ornament jewelry long_hair looking_at_viewer medium_breasts nannacy7 necklace satono_diamond_(umamusume) solo sweater turtleneck turtleneck_sweater umamusume white_background|24876112482