1girl ^_^ aino_nagisa backstage bare_arms bike_shorts bottle bow breasts brown_hair closed_eyes commentary crop_top curtains facing_viewer fingerless_gloves from_behind gloves grin hair_bow idol idolmaster idolmaster_cinderella_girls long_hair looking_back medium_breasts midriff miniskirt miridereningen ponytail skirt sleeveless smile solo suspenders_hanging sweat towel v water_bottle yellow_gloves yellow_skirt