1girl, backpack, bag, barefoot, bikini, black_bikini, black_hair, breasts, breasts_apart, crossed_arms, expressionless, idolmaster, idolmaster_cinderella_girls, looking_at_viewer, randoseru, red_bag, sasaki_chie, side-tie_bikini_bottom, simple_background, small_breasts, solo, squatting, swimsuit, tsunenorip, white_background