Rule 34 Dev - 1girl arm_behind_back aston_machan_(umamusume) black_background black_bow bow breasts brown_hair buttons crown double-breasted dress ear_piercing green_eyes hair_between_eyes highres large_breasts piercing pointing pointing_at_self red_dress ruisuke short_hair simple_background smile solo tilted_headwear umamusume|18129047391