1girl, black_hair, black_skirt, black_thighhighs, blush, border, bow, bowtie, brown_eyes, cosplay, green_vest, hair_bobbles, hair_ornament, hands_on_own_knees, idolmaster, idolmaster_million_live!, legs, lielos, long_sleeves, looking_at_viewer, nakatani_iku, open_mouth, otonashi_kotori, otonashi_kotori_(cosplay), panties, pantyshot, sandals, shirt, short_hair, side_ponytail, skirt, solo, squatting, thighhighs, thighs, underwear, v-shaped_eyebrows, vest, white_border, white_footwear, white_panties, white_shirt, yellow_background, yellow_bow, yellow_bowtie