1girl bikini blush breasts brown_eyes cleavage cleavage_cutout closed_mouth clothing_cutout grey_sweater highres idolmaster idolmaster_cinderella_girls large_breasts long_sleeves looking_at_viewer mifune_miyu ponytail red_hair short_hair side-tie_bikini_bottom sitting smile solo sweater swimsuit tomajiyama turtleneck turtleneck_sweater window