Rule 34 Dev - 1girl aged_up black_sports_bra blush breasts collarbone drying female grey_eyes grey_hair highres hood hooded_jacket idolmaster idolmaster_cinderella_girls jacket navel open_mouth otokura_yuuki outdoors partially_unzipped pink_jacket sg_(esujii) short_hair small_breasts smile solo sports_bra sweat towel zipper|3141330392