1girl, o, black_socks, blush, breasts, brown_footwear, brown_hair, collarbone, cropped_shirt, idolmaster, idolmaster_shiny_colors, long_hair, looking_up, medium_breasts, midriff, navel, neckerchief, onpu_(ghkc2238), osaki_amana, red_neckerchief, school_uniform, serafuku, short_sleeves, simple_background, sitting, socks, solo, straight_hair, very_long_hair, white_background, yokozuwari